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Equipment Discussions >> Refractors

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ASTROLAWYER
member


Reged: 01/25/08

Loc: Cook County, IL
Celestron 100 mm f 9.8 achro with goto at Costco
      #5475452 - 10/17/12 04:53 PM

I've been around long enough to know to stay away from department store refractors or anything which says 450x on the box, BUT Costco has this thing for $200. I figure the tripos has to be lousy, but if the optics are even decent then this thing seems like it would be a good buy. Anyone want me to pick ne up and test it?

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Zamboni
scholastic sledgehammer
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Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: ASTROLAWYER]
      #5475483 - 10/17/12 05:12 PM

The optics are the same as the Omni 102. I plan on getting one so I can remount the OTA down the road and use the mount for my PST.

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tomchris
professor emeritus


Reged: 12/22/10

Loc: Connecticut, U.S.A.
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: ASTROLAWYER]
      #5475647 - 10/17/12 06:26 PM

I don't think I could buy a scope from Costco unless I wanted to use it's parts for something, as it appears Tristan is doing. I can't believe that the optics would be decent at all. I'd use the $200 toward some worthwhile eyepiece....only my opinion.

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Zamboni
scholastic sledgehammer
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Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tomchris]
      #5475709 - 10/17/12 07:16 PM

As I said, the optics are exactly the same stock Synta f/9.8 as the Omni 102 and the old C-102 HD. The Skywatcher 102 f/9.8 in Canada is also from the same optics. These scopes have VERY respectable optics, but are undermounted in this circumstance. Still, the OTA is worth the asking price in my opinion.

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Jim7728
Postmaster
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Reged: 04/10/05

Loc: Stoop Landing Observatory, NYC
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5475768 - 10/17/12 07:56 PM

What goto mount could a Celestron 100mm f/9.8 ota be on other than a puny LCM for $199? Or is this a 100mm f/6 ota on a SLT mount?

I should just renew my Costco membership, could use some bulk supplies of kitty litter.


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Zamboni
scholastic sledgehammer
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Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Jim7728]
      #5475896 - 10/17/12 09:22 PM

This thing is WAY undermounted in this case, but I have been wanting a Synta 4" f/10 OTA for a really long time, and I've been seriously eyeing the little nexstar mounts for my PST (just need a dovetail rail and an L bracket and I'll be golden!

I would pay the asking price for the OTA alone. Gettin a decent small mount for the PST as a freebie is a great bonus. I should have the funds to snag this next month and I hope they still have them in stock.


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KWB
Postmaster
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Reged: 09/30/06

Loc: Westminster,Co Elev.5400 feet
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Jim7728]
      #5475902 - 10/17/12 09:27 PM

Quote:

What goto mount could a Celestron 100mm f/9.8 ota be on other than a puny LCM for $199? Or is this a 100mm f/6 ota on a SLT mount?

I should just renew my Costco membership, could use some bulk supplies of kitty litter.



It's the 102mm F/9.8. There is an every growing thread about it here. Nexstar 102GT


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Jim7728
Postmaster
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Reged: 04/10/05

Loc: Stoop Landing Observatory, NYC
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: KWB]
      #5476015 - 10/17/12 10:38 PM

Thanks!

Looks like one person was having fun with it.


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Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Jim7728]
      #5476157 - 10/18/12 12:46 AM

Looking over the specs, it looks pretty certain that the mount itself is the Nexstar SLT. Same tripod, vixen style dovetail rail, skyalign, etc. Considering the mount itself typically costs 300 when purchased individually, and the OTA costs around 230 when purchased individually (from Skywatcher Canada, since it's typically not available individually in the US), this is possibly the single most insanely good bargain I've ever seen as long as you intend to use the mount and scope separately.

I'll be picking mine up in about a month. I'll provide a comprehensive test report.


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watcher
Carpal Tunnel
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Reged: 11/21/07

Loc: St. Louis, MO
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5476225 - 10/18/12 01:49 AM

Saw one a few weeks ago. Considering the short 4" on the SLT has been more than double the price..... Well, if I had 200 in my pocket at the time, I would have bought one just because!

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tomharri
sage
*****

Reged: 09/19/08

Loc: USA
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: watcher]
      #5476497 - 10/18/12 08:00 AM Attachment (101 downloads)

AND IT'S GOOD!!! For an achromat. Max power on Jupiter is 250x, 4mm, before the scattered colors smear out the image. Couldn't see the E & F stars in Trapezium, had light high cirrus clouds. But at high power the stars are little airey discs with 1 diffraction ring.
For a Chinese mass-mass produced scope, this is as good as the Jaegers leftover scopes I've been building. And their lenses cost $200. Gotta use the mount for something else however, hang flower pots or something.


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Zamboni
scholastic sledgehammer
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Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tomharri]
      #5476539 - 10/18/12 08:46 AM

Not at all surprised. Every time i've looked through a C102HD/CR-4/Omni 102/Skywatcher 102 etc. the views have always been pretty top notch. I've been wanting one of these OTAs for about ten years but didn't want a CG4 mount. I wanted to get the OTA and mount it on a CG5. Well, I'm getting a CG5 next year so this is beyond perfect.

Also, since I picked up a PST two months ago I had been taking some long looks at the Nexstar SLT mount to use as a dedicated PST tripod. I do a lot of outreach so tracking is important, but the $300 price turned me off. Now I see this and I'm pleased as punch.

Maybe I'm a bit overexcited...


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watcher
Carpal Tunnel
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Reged: 11/21/07

Loc: St. Louis, MO
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tomharri]
      #5477866 - 10/18/12 10:18 PM

The SLT mount is actually a very nice little G&G goto mount for a shorter scope, especially if you replace the legs with wooden ones. Use mine with my TMB 80SS. It's a perfect match.

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Raldo
member


Reged: 03/24/11

Loc: PR
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: watcher]
      #5482858 - 10/21/12 11:16 PM

Hi, I want to change the dovetail of my scope to tube rings. Which size and what extras do I need. I have a cg5 gt. Where can I buy the rings. I don't want to spend to much money. Thanks.

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Zebra24601
Postmaster
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Reged: 10/09/05

Loc: San Gabriel Valley, CA 91770
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Raldo]
      #5482899 - 10/21/12 11:45 PM

scopestuff.com has all sorts of rings and stuff.

Why do you want to replace your dovetail with rings? You'd probably still need to buy a dovetail to attach your rings to a mount.


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Raldo
member


Reged: 03/24/11

Loc: PR
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zebra24601]
      #5482930 - 10/22/12 12:16 AM

Hi and thanks for your reply. I added a 2in diagonal. With the diagonal and my 2in eyepieces I am having balance problems on the mount. The dovetail is to short, and I am afraid that eventually will hurt the gears of the mount. Maybe my concern does not justify the change, I don't now.

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Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Raldo]
      #5482955 - 10/22/12 12:38 AM

Your concern does justify the change. When I get mine I'll be adding a 9x50 finder, a 2" diagonal and replacing the focuser with a dual speed crayford. That wil definitely throw the balance off and that short little dovetail just doesn't give you any room to rebalance.

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Raldo
member


Reged: 03/24/11

Loc: PR
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5483131 - 10/22/12 06:03 AM

So, going back to my original question, what size of rings I need for this OTA and any extras?.

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Starhawk
Space Ranger
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Reged: 09/16/08

Loc: Tucson, Arizona
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Raldo]
      #5483379 - 10/22/12 10:38 AM

Put a tape measure around the barrel, measure the circumference, then divide the result by 3.14159. That's the size of rings you need.

From eyeballing and handling, I'd guess maybe 4.5" in diameter. But measuring is a much better idea.

-Rich


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Starhawk
Space Ranger
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Reged: 09/16/08

Loc: Tucson, Arizona
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5483383 - 10/22/12 10:40 AM

Indeed- a great deal on two pieces of equipment, but ones which are unusually poorly suited to each other.

-Rich

Quote:

Looking over the specs, it looks pretty certain that the mount itself is the Nexstar SLT. Same tripod, vixen style dovetail rail, skyalign, etc. Considering the mount itself typically costs 300 when purchased individually, and the OTA costs around 230 when purchased individually (from Skywatcher Canada, since it's typically not available individually in the US), this is possibly the single most insanely good bargain I've ever seen as long as you intend to use the mount and scope separately.

I'll be picking mine up in about a month. I'll provide a comprehensive test report.




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Raldo
member


Reged: 03/24/11

Loc: PR
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Starhawk]
      #5483451 - 10/22/12 11:21 AM

Thanks, starhawk.

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Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Starhawk]
      #5483585 - 10/22/12 12:37 PM

Quote:

Put a tape measure around the barrel, measure the circumference, then divide the result by 3.14159. That's the size of rings you need.

From eyeballing and handling, I'd guess maybe 4.5" in diameter. But measuring is a much better idea.

-Rich




This is too complicated of a step for this particular scope. Orion, scopestuff, Astrotech, Agena and more all sell tube rings explicitly sized for this OTA. Since the tube is the same diameter as all Orion, Celestron, Skywatcher and Synta 4" Achros, just look for tube rings rated for those tubes. You'll find them easily.


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core
Pooh-Bah
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Reged: 02/23/08

Loc: Mostly in Norman, OK
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: watcher]
      #5483589 - 10/22/12 12:42 PM

Quote:

if you replace the legs with wooden ones. Use mine with my TMB 80SS. It's a perfect match.




Wondering if you replaced the entire tripod (pics?), or just the legs? I'd thot the legs on the SLT were riveted in. Looks like I may pick one up as well, mainly for the mount to use on smaller OTA's.


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KWB
Postmaster
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Reged: 09/30/06

Loc: Westminster,Co Elev.5400 feet
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5483603 - 10/22/12 12:47 PM

Quote:

Quote:

Put a tape measure around the barrel, measure the circumference, then divide the result by 3.14159. That's the size of rings you need.

From eyeballing and handling, I'd guess maybe 4.5" in diameter. But measuring is a much better idea.

-Rich




This is too complicated of a step for this particular scope. Orion, scopestuff, Astrotech, Agena and more all sell tube rings explicitly sized for this OTA. Since the tube is the same diameter as all Orion, Celestron, Skywatcher and Synta 4" Achros, just look for tube rings rated for those tubes. You'll find them easily.



There is more than one way to tree a coon,as in however one finds a needed tube ring size is all that matters. Using a caliper is a 3rd way of helping to resolve the problem.


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watcher
Carpal Tunnel
*****

Reged: 11/21/07

Loc: St. Louis, MO
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: core]
      #5484771 - 10/23/12 04:26 AM

Quote:

Quote:

if you replace the legs with wooden ones. Use mine with my TMB 80SS. It's a perfect match.




Wondering if you replaced the entire tripod (pics?), or just the legs? I'd thot the legs on the SLT were riveted in. Looks like I may pick one up as well, mainly for the mount to use on smaller OTA's.




Mine's a little buried in the garage right now. Moved here in February and haven't even used that one since I got here. The legs are swappable. no need to change the whole tripod. Here's a pic of someone else's with additional mods in a different thread


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BigC
Carpal Tunnel
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Reged: 09/29/10

Loc: SE Indiana
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5484958 - 10/23/12 09:53 AM

Quote:

Looking over the specs, it looks pretty certain that the mount itself is the Nexstar SLT. Same tripod, vixen style dovetail rail, skyalign, etc. Considering the mount itself typically costs 300 when purchased individually, and the OTA costs around 230 when purchased individually (from Skywatcher Canada, since it's typically not available individually in the US), this is possibly the single most insanely good bargain I've ever seen as long as you intend to use the mount and scope separately.

I'll be picking mine up in about a month. I'll provide a comprehensive test report.



Looks like some people don't want to recognize a good deal This scope has been reviewed elsewhere,including one of the websites in England and rated well.This would be a good starter scope ..


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Meadeball
sage


Reged: 10/22/12

Loc: Midlothian, Virginia
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: BigC]
      #5485048 - 10/23/12 10:56 AM

GM everyone -- I'm new here; I read this thread after doing a Google search and had to join to make a couple of comments. I'm 47 and have been into amateur astronomy since I was 11. I started with a $19 2-1/2-inch reflector from Sears and at one time owned an 8-inch Celestron SCT, and in the interim have owned about 10 other scopes of various design including Maks, SCTs and newts. Right now I'm divorced and just casually into the hobby. The last scope I had was an Orion Starmax 127 that replaced a Meade ETX-90, but I got rid of the Starmax about five years ago.

Last fall I was in Costco and came across the same deal you guys are talking about this fall. I picked up the 102GT and have been enjoying it casually ever since. Yes, the mount and tripod is its Achilles Heel; the tripod needs to be taller and beefier. I've been looking for a way to modify it because it could stand being about a foot taller. Anything near overhead and I'm on my knees in the dewy grass.

Tell you what, though, this "little" scope has one heck of a set of optics for the price. I'm splitting close doubles all the time, and the Orion nebula surprised the heck out of me. I guess a little chromatic aberration can be a good thing when it comes to celestial beauty, lol! Truth be told, the aberration is low considering some other refractors I've used. The focuser is actually metal and well-lubricated -- it shines compared with the plastic one Meade put on the 8-inch Starfinder reflector I once purchased for more than twice the price of this little refractor. The rubber inlays in the focuser knobs are helpful on cold nights too. I've considered buying something like a CG-4 mount and putting the OTA on it, but I'd be doubling the price of the scope and then some, and I'd lose the GOTO capability. I'm still undecided on what I'll do to modify that mount.

One thing I think Celestron took the cheesy approach on is the battery setup. Most of their Nexstars have a battery compartment inside the base. For some reason this one has a cheap little battery holder that you have to plug in to the base and set (or hang) on the tripod. It doesn't bespeak high-quality. If you buy one of these scopes, go ahead and spring the ~$20 for the AC and/or DC power adapters, because (a) they're a much more elegant solution, and, more importantly, (b) the 8 AA batteries will only last a few hours at best. The mount EATS batteries. One other quibble; there's no "on-off" switch on the mount. Plug in the power from whatever source and it's running until you pull the plug.

Bottom line? This scope isn't perfect, but it's worth every bit of $199. It belongs in the $300-$400 category. It's a great scope you can one-hand-carry out at a moment's notice, or if you prefer to pack it up, here's a great accessory I purchased:

http://www.telescopes.com/telescope-accessories/cases/zhumellmediumtelescopecase.cfm

The best telescope is the one you're going to use most, right? Well, by that standard, this may be the best telescope I've owned!

Like last year, this scope was a bit of an enigma at Costco. It never appeared on their website, and the store even had a hard time locating it in their inventory list when I called asking how many they had left.

But if you're considering one, keep a close eye on the stock and WAIT. Last year, when they started to run low in early November, they enacted a $50 instant rebate which brought the scope down to $149. I didn't hear about it until January and successfully went back and had the rebate applied retroactively, but it took two visits and some phone calling. Do yourself a favor and watch what happens over the next few weeks. It's a great deal at $199, but a steal at $149!


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Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Meadeball]
      #5485156 - 10/23/12 12:09 PM

I'll definitely keep an eye out for the rebate deal!

What you said about the battery pack indicates that it isn't the SLT mount after all. It looks like they took the older Nexstar GT mount (which is still sold under the Skywatcher brand in Canada) and added the SLT tripod and dovetail rail setup and supplied it with the current Altaz hand controller. Will still make a great mount for my PST.

I'm thinking when ai build the L bracket for the PST I'll make a YouTube instructional video for it. I already have the parts list and blueprint written up. I have an iPhone with a tripod adapter and iMovie app. Might as well spread the joy.


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Meadeball
sage


Reged: 10/22/12

Loc: Midlothian, Virginia
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5485245 - 10/23/12 01:02 PM

Thanks for the kind reply. Yep, I'm out there for a deal too -- money's tight these days. How's this for a deal -- you guys should keep your eyes open for stuff like this too -- back in 2008, KMart offered a Meade RB60 -- your basic, 60mm "department store" refractor -- for Christmas for $79.99. I was browsing the store sometime in January and found the store's "clearance" aisle, and there were two of these scopes, still in the box -- they had been picked over because their boxes were a little dinged up -- but they'd been reduced twice since Christmas, and they were currently asking only $28.99 for each of them! I couldn't pass up such a deal, even for a cheap little throwback to my first days in the hobby.

I've played with the scope a few times; as expected, it's not much -- but it came with two Meade MA eyepieces (25 & 9 mm) -- Meade has redesigned the MA's into Plossl lookalikes, complete with fold-down rubber eyecups, and even though they have "China" stamped on them, they don't look (or see) bad. The eye relief is OK on the 25 (I wear glasses), but sucks on the 9. Here's a pic:



They have a 40mm FOV, which, like somebody said over on the eyepiece forum, was state-of-the-art when I was getting into the hobby. I figure, hey, two OK eyepieces and a toy telescope for $28. Whadda bah-gain!!! Motto of story: Watch those closeout and clearance sections!


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Meadeball
sage


Reged: 10/22/12

Loc: Midlothian, Virginia
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Meadeball]
      #5485641 - 10/23/12 04:51 PM

BTW, I skimmed the posts in this thread and didn't see anyone provide the link to Celestron's page on this telescope. Believe it or not, it's on Celestron's site ... it's just not easy to find. Here's the page ...

http://www.celestron.com/astronomy/telescopes/nexstar-102-gt-computerized-telescope.html?opentab=support

Scroll down the page and you'll see an instructional video, a .pdf of the manual you can download, and an accessories sheet. (You can read my review -- the author is "M" -- too!) Hope this helps someone.

Meade

Edited by Meadeball (10/23/12 05:00 PM)


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tnakazon
sage


Reged: 06/26/10

Loc: Los Angeles
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Meadeball]
      #5486272 - 10/23/12 11:39 PM Attachment (33 downloads)

Thanks for the link! I also saw that this scope was on the Celestron website, but that it can't be purchased online (only through Costco). I'll need to register this scope online.

Still having some problems with the GOTO - I can only get the two-star alignment to work in a light-polluted setting. But the SkyAlign (3-star) worked in a dark-sky site.

Also sometimes the hand controller power goes off (a faulty cord?) and I have to play with the connection to get it back on again and reset the alignment.


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BigC
Carpal Tunnel
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Reged: 09/29/10

Loc: SE Indiana
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tnakazon]
      #5486384 - 10/24/12 01:47 AM

Poor power connection is a weakness of Celestron scopes;they use a slightly non-standard power connector but if your cord is Celestron it should be correct.

It is best for reliable operation to have good batteries in the mount as well as the external power tank.The internal batteries will get you through the cord being pulled out,etc. Be careful about leaving batteries internally too long,after some time (months)they may leak and corrode.


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Meadeball
sage


Reged: 10/22/12

Loc: Midlothian, Virginia
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: BigC]
      #5486758 - 10/24/12 10:34 AM

Quote:

It is best for reliable operation to have good batteries in the mount as well as the external power tank. The internal batteries will get you through the cord being pulled out, etc.




Not possible. This telescope doesn't provide internal battery storage -- the batteries are inserted into an external 8-AA pack that plugs into the same connector on the side of the fork that you would also plug external power into. It's either/or, not both.

The arrangement is just visible in the photo below, which I found using Google. Celestron provides a little "leatherette" snap-case with a loop hanger on it for the pack -- the user here has elected to hang it on one of the tripod leg adjustment screws. I place mine on the accessory shelf. I've been thinking about going to Radio Shack and "upping" the battery pack to an 8-D cell pack, or retrofitting the cord to a small 12-volt SLA battery I have for a piece of camping equipment. Either way will provide lots more observing time than the 3-4 hours a set of fresh AAs will provide. (And as a bonus, the heftier weight of a heavier battery pack, placed on the accessory shelf, will help a bit in stabilizing the mount and tripod. ...)



Meade

Edited by Meadeball (10/24/12 10:51 AM)


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mclewis1
Thread Killer
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Reged: 02/25/06

Loc: New Brunswick, Canada
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: BigC]
      #5488689 - 10/25/12 02:00 PM

Quote:

Poor power connection is a weakness of Celestron scopes;they use a slightly non-standard power connector but if your cord is Celestron it should be correct.



The connector is hardly "non standard" ... it's a 2.1mm x 5.5mm DC power connector which is very popular and used in a whole variety of products including the whole Celestron scope/mount family. The other popular connector is 2.5mm x 5.5mm (used my Meade and others) and this is where the problems sometimes occur ... the two look identical but the 2.5mm connector fits too loosely and causes intermittent power problems.

The first number in the specifications is the diameter of the center pin, the second is the diameter of the barrel of the connector. Seen side by side the two different connectors are obviously different but on their own it's almost impossible to differentiate a 2.5mm opening from a 2.1mm one.


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*skyguy*
Carpal Tunnel
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Reged: 12/31/08

Loc: Western New York
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tnakazon]
      #5489296 - 10/25/12 09:27 PM

Quote:


Also sometimes the hand controller power goes off (a faulty cord?) and I have to play with the connection to get it back on again and reset the alignment.




I used to have the same problem with my SLT mount. The center pin on the SLT connector is split. Take a very small screwdriver or knife and carefully widen the pin. It will now hold the plug tighter and you won't loose the connection anymore.


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BigC
Carpal Tunnel
*****

Reged: 09/29/10

Loc: SE Indiana
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Meadeball]
      #5489457 - 10/25/12 11:16 PM

OOOPS!

So many battery powered scopes have internal battery compartments I just assumed the scope under discussion also had that compartment.

I have enough computer and other stuff that all use different size connectors ,it would be nice if all scopes used the same one!


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stevew
Now I've done it


Reged: 03/03/06

Loc: British Columbia Canada
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: ASTROLAWYER]
      #5489464 - 10/25/12 11:20 PM Attachment (42 downloads)

I was at my local Costco today, and all they had was this 90mm Meade.
I don't think I have ever seen so much plastic.
Even the silver focuser draw tube was plastic, and when I turned the focuser the draw tube would flex up and down not just in and out.
The mount fork arm was also plastic.
Don't you love it when they set up scopes the wrong way...


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stevew
Now I've done it


Reged: 03/03/06

Loc: British Columbia Canada
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: stevew]
      #5489471 - 10/25/12 11:21 PM Attachment (33 downloads)

I'd love to see this scope pull in 30,000 objects....

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Jim7728
Postmaster
*****

Reged: 04/10/05

Loc: Stoop Landing Observatory, NYC
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: stevew]
      #5489534 - 10/26/12 12:01 AM

LOL I also went to Costco and the Celestron was set up the same way.

However, I did put the ota in it's correct position...then security swarmed around me. Not!

Still tempted to pick one up, but have too much astro clutter.


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tnakazon
sage


Reged: 06/26/10

Loc: Los Angeles
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: *skyguy*]
      #5489576 - 10/26/12 12:38 AM

Quote:

Quote:


Also sometimes the hand controller power goes off (a faulty cord?) and I have to play with the connection to get it back on again and reset the alignment.




I used to have the same problem with my SLT mount. The center pin on the SLT connector is split. Take a very small screwdriver or knife and carefully widen the pin. It will now hold the plug tighter and you won't loose the connection anymore.



Thanks for the tip! I'll try it out.


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Crow Haven
Pooh-Bah


Reged: 01/09/09

Loc: Oregon USA
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tnakazon]
      #5491841 - 10/27/12 03:31 PM

This past Thurs. Paul and I had to go to Portland so on our return trip we stopped in Eugene at the Costco there. I found the boxed Nexstar 102 GT scope on a pallet underneath some shelves, easy to miss, and no model on display. I thought this might be fun for parts -- particularly the mt. as a tracking grab & go for my PST and other light otas like a new model C-90 (another incredible bargain @ $148 -- I have already a mt. L-bracket and AC adapter that fits). What a surprise -- it all works!!! Actually, the 4" scope is fun too, the CA isn't bad, and the ota is sturdy with a usable 2" focuser and metal parts. The Huygens eyepiece set is funny but later I'll check them out...not expecting much.
I plan to use the 4" scope on other mts. mainly.
Fun!
---Maya


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Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Crow Haven]
      #5492286 - 10/27/12 09:15 PM

Welp, looks like my local Costco doesn't carry it. Unfortunately, that doesn't kill my ambition to have a 4" achromat.

Might be biting the bullet and getting an Omni 102 XLT in a few weeks. Also a motor drive, a piggyback adapter for my PST and a herschel wedge...

I'll be in my bunk.


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5492561 - 10/28/12 01:41 AM

I'll see what I see at ASAE. The mount is a slam dunk for little scopes like the PST, up through a C5, it looks like. The long 102mm OTA appears to be the only complication.

I'm wondering if my little one could find an OTA she liked for it.

-Rich

Edited by Starhawk (10/28/12 01:43 AM)


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Locoman
scholastic sledgehammer
*****

Reged: 03/09/09

Loc: Abilene, Kansas
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5532840 - 11/21/12 07:23 PM

Quote:

The optics are the same as the Omni 102. I plan on getting one so I can remount the OTA down the road and use the mount for my PST.



The optics are the same as the Omni 102 XLT or is there a Omni 102 I've never heard of? If its the same as the XLT is this really true?


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Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Locoman]
      #5532900 - 11/21/12 08:10 PM

They're the same 4" f9.8 synta objective as the Omni XLT. The only dofference is the lens cell on the costco refractor is non-collimatable.

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Danieljtb
member


Reged: 04/12/11

Loc: eugene OR
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5533069 - 11/21/12 10:42 PM

Crowhaven Im in Eugene did costco have more of these scopes,or just the one you picked up? if they had more will need to find someone with a costco card

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Meadeball
sage


Reged: 10/22/12

Loc: Midlothian, Virginia
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5533073 - 11/21/12 10:43 PM

I was just in my local (Richmond, VA) Costco this evening. They had about 15 of them left on the floor.

As for the non-collimatable objective, I dunno whether that's a good thing or a bad thing. (As Forrest Gump said, "You know ... one less thing." )

I guess, should the need ever arise, you could unmount (dismount?) the cell from the GT and replace it with a cell from an Omni and still come out a few hundred bucks ahead in the game.

I've had my 102GT for about 13 months now, and it continues to deliver stellar (ahem) images. No doubt the mount on the Omni is light-years (ahem ahem) ahead of the less substantial mount on the GT, but then again, I didn't have a $500 budget for a new scope, having just gone through a divorce and a job change in the wrong direction. This way I know I have a good OTA, and later I can change mounts or whatever as the need/desire arises. I feel it was a good way to get back into the hobby on a shoestring budget but still have enough aperture, and decent mechanicals, to enjoy a "real" telescope instead of the usual crapola available in this price range. Or, if I decide to move up into another scope, I've seen these GT's going for $50 over retail on ebay. I baby everything I own, so I should be able to get nearly everything out of it that I put into it -- especially if I sell sometime in the summer months since this appears to be a "holiday special" that Celestron ships to Costco only at this time of year. (Even the GT's page on Celestron's website notes, "Available at Costco.") Like last year, we probably won't see any more of these until late October 2013.

If you really want one of these and can't locate one near you, PM me here. I'll be happy to arrange a third-party purchase and ship one to you at whatever the cost comes to. I know, I know. I'm such a good guy. Hey, it's the Christmas season.

Meade

Edited by Meadeball (11/21/12 10:50 PM)


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Sky Muse
sage


Reged: 10/26/12

Loc: De Soto County, MS
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Zamboni]
      #5533211 - 11/22/12 12:45 AM

That's rather bizarre that Costco, of all places, would have a four-inch, relatively long-focus achromat on their premises, much less for sale, though the inclusion of Huygenian oculars make it somewhat less surprising, granted.

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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Sky Muse]
      #5533294 - 11/22/12 02:01 AM

Well, the kids fell in love with it. I've had my 7 year old daughter explaining how they could set it up, and I could set up a telescope, also. I'll have to be quiet until they can be surprised with it. I know some may disagree, but I've always thought the little NexStar mounts like this were neat.

-Rich


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Crow Haven
Pooh-Bah


Reged: 01/09/09

Loc: Oregon USA
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Danieljtb]
      #5534074 - 11/22/12 03:05 PM

Hi -- yes, the Eugene Costco had them on a floor pallet under some shelves in the section near the kids toys and musical instruments/keyboards etc. and holiday decos. At the time there was about a dozen left. I'm really shocked at the value still! The mt. works great and I got the adapters thru Amazon so as not to have to deal with the batteries. The scope itself is sharp and a nice achro for the price. I have smaller lt. wt. scopes (mt. is rated for about 8 lbs. I think) and a PST I'm primarily using the mt. for.
---Maya


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BigC
Carpal Tunnel
*****

Reged: 09/29/10

Loc: SE Indiana
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Meadeball]
      #5534447 - 11/22/12 08:46 PM

My sympathies on your personal troubles;went through the same things "last century"

Despite some opinions I think this Celestron Costco special 102 goto is a nice scope for the money ,and even the unusual inclusion of Huygenian EPs isn't that bad considering the long focal length.Although I would have thought Celestron would incluse at least MA or SMA as with other scopes.

Nexstar controllers just seems to be easier to use than Autostar although both work well once aligned.

THe naysayers who insist you must spend $500 (or more) and thus disuade many would-be hobbyists from ever getting that first scope deserve a lump of coal in their stockings!


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Meadeball
sage


Reged: 10/22/12

Loc: Midlothian, Virginia
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: BigC]
      #5534849 - 11/23/12 04:07 AM

The eyepieces are budget quality, but they aren't bad. In fact I kind of like the little MH 25mm one -- it has a decent FOV (seems like maybe 40 degrees) and a good amount of eye relief -- I can keep my glasses on while using it. The 20mm Huygenian one is similar. They've got threaded metal barrels and the lenses are actually screwed into their plastic housings with metal O-rings. (I've seen cheap eyepieces whose lenses were merely GLUED into their barrels!) Where you might get one or maybe two MAs with most scopes in this price range, Celestron opted to go a little more budgety with the optics and give you a nice range of 5 eyepieces (4, 8, 12.5, 20 & 25) in a nice little padded case embossed with the Celestron logo.



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tnakazon
sage


Reged: 06/26/10

Loc: Los Angeles
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: Meadeball]
      #5541223 - 11/26/12 10:45 PM

I find that this 5-eyepiece set works very well with my 50mm F/10 Galileoscope.

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ASTROLAWYER
member


Reged: 01/25/08

Loc: Cook County, IL
Re: Celestron 100 mm f 9.8 achro with goto at Costco new [Re: tnakazon]
      #5579011 - 12/19/12 02:10 PM

Just thought you should know, my local Costco is now selling these for $199 with a $40 "Instant Rebate" from Celestron, yielding a $159 final price.

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