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Finally--a stock 6" f/5 w/2" focuser--Omni XLT 150

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#26 Pinbout

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Posted 02 March 2013 - 07:57 PM

is it 50 times less useful? lol



I put it up to my tv genesis that it's next. looking at saturn it was only a little softer. I was realy suprised at the magification it took.

so $60 compared to tv genesis could go for $950 but when original how much was it? :p

#27 Starman81

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Posted 03 March 2013 - 01:29 PM

Is the 6 X 30 straight through finder correct image or mirror image?

Thanks.


Not a correct image but an upside-down image, not sure if it is mirror image but I never considered using it anyways.

#28 Sarkikos

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Posted 04 March 2013 - 11:03 AM

The 6x30 finder looks like the same that is supplied on many Celestron, Orion and SkyWatcher telescopes. It produces an inverted image, same orientation as in a refractor without the diagonal or in a Newt. The image is just turned 180 degrees.

Mike

#29 Sarkikos

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Posted 04 March 2013 - 11:10 AM

Well, I ordered one of these 6" OTA's this past Saturday night. I've been looking for a 6" f/5 Newt with a 2" focuser for a long time. I want to maximize the aperture and ease of portability and minimize the weight and cool-down time for a grab-n-go scope. I define grab-n-go as one trip out the door, telescope on mount. Anything else is not really grab-n-go.

I also like the image orientation in a Newt: inverted. Ideally, I'd want the natural orientation, but that is difficult to accomplish optimally except for binoculars. I don't like a reversed image as in a refractor+diagonal, Mak or SCT.

The fact that the Woodland Hills vendor verified that these XLT 150's are shipping with a 2" Crayford closed the deal for me. :ubetcha:

Looks like I might be selling my 130mm f/5 Newt soon.

Maybe I'll do a three-way shootout among my 6" f/5 Newt, 6" f/12 Mak and 6" f/15 SCT. It's difficult to justify keeping all three now.

:grin:
Mike

#30 Sarkikos

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Posted 04 March 2013 - 11:23 AM

Get this from the ad patter for the Omni XLT 150:

Using aspheric shaping technology in conjunction with hand-figuring the optics, the Omni XLT presents an image with virtually no spherical abberation.


A fancy-shmancy way of saying the primary is parabolic. :thinking:

:grin:
Mike

#31 Night2Fire

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Posted 04 March 2013 - 03:37 PM

Is anyone or has anyone use this scope to image with and if so, How well did it do?

#32 Astrojensen

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Posted 04 March 2013 - 04:22 PM

Several Danish imagers use 6" f/5 dobs and they do very well indeed. You need a coma corrector, of course, like for any other f/5 newtonian.

This image, for example: http://www.astronomi...m81-m82.ed1.jpg

is taken with a Sky-Watcher Explorer 150 on an EQ-3 mount with a Canon EOS500D, by danish amateur Henrik Rosenørn. The Explorer 150 is virtually identical to the Celestron Omni XLT 150.


Clear skies!
Thomas, Denmark

#33 Joe Bergeron

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Posted 05 March 2013 - 11:32 PM

Oh, that's tempting. I berate myself for selling my Omni 150 for some pittance a few years ago, and I'd be happy to have one back.

#34 Starman81

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Posted 06 March 2013 - 12:55 AM

Oh, that's tempting. I berate myself for selling my Omni 150 for some pittance a few years ago, and I'd be happy to have one back.


Joe, I enjoyed reading your excellent review of the Omni XLT 150 (old focuser version) while I waited for mine to arrive in the mail. The comparison versus the Astro-Physics 155 f/9 EDT was enlightening. Also, you're right about that faux-Pentax freebie EP that comes with the scope--it's not too shabby!

#35 Joe Bergeron

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Posted 06 March 2013 - 01:05 PM

Thanks. Maybe I'll have an addendum for my review soon.

#36 waso29

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Posted 06 March 2013 - 09:51 PM

Orion discontinued their 6in imaging newt.
It had 2in crayford with fine focuser and built-in extension tube.

Try using WO binoviewers with the newt.
Nice comet scanner.

#37 coopman

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Posted 06 March 2013 - 10:10 PM

I'm trying really hard to convince myself that I don't need this scope.

#38 coopman

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Posted 06 March 2013 - 10:14 PM

I also noticed that the WH website's description of the scope has not been revised yet.

#39 Locoman

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Posted 06 March 2013 - 10:16 PM

I'm trying really hard to convince myself that I don't need this scope.


I already have the C6- N and I did it! :foreheadslap:

#40 cordite33

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Posted 07 March 2013 - 01:56 AM

Interesting! This looks like it would be a great grab and go scope. I don't have any mount for it.

What would be a good but simple mount for this scope? Something like the mount in the op photo? What is that one?

#41 Locoman

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Posted 07 March 2013 - 04:31 AM

The Orion VersaGo ll is what I use.

Attached Files



#42 KerryR

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Posted 07 March 2013 - 09:30 AM

Do you have any interference issues on that Versago?

#43 BoldAxis1967

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Posted 07 March 2013 - 11:37 AM

Mr. Bergeron,

The main reason I bought the Omni XLT 150 last May (2012) as my first scope was because of your review. It was excellent! As a matter of fact I still refer to it.

I did update the mount to a GPD2 in part in anticipation of buying a larger OTA.

My only real complaint of the scope is the slop in the focuser, which has become more apparent with the GPD2.

So, now I formally thank you for your informative and well written review!

#44 Locoman

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Posted 07 March 2013 - 11:43 AM

Do you have any interference issues on that Versago?


It cannot go 90 degrees, maybe 80 degrees if my memory serves me well. It is like a dob on a tripod and with degree circles. Very smooth, light, transportable and easy to use.

#45 Locoman

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Posted 07 March 2013 - 11:51 AM

Mr. Bergeron,

The main reason I bought the Omni XLT 150 last May (2012) as my first scope was because of your review. It was excellent! As a matter of fact I still refer to it.

I did update the mount to a GPD2 in part in anticipation of buying a larger OTA.

My only real complaint of the scope is the slop in the focuser, which has become more apparent with the GPD2.

So, now I formally thank you for your informative and well written review!


I did this to the focuser on my C6-N and it is very smooth with no slop. I added two strips of teflon to the upper draw tube directly opposite of the ones on the bottom and the focuser is now light years from what it was!

#46 BoldAxis1967

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Posted 07 March 2013 - 12:11 PM

Thanks Locoman!

I just did quick scan of the link you included. Will certainly investigate this option further. Could be just what the doctor ordered :).

Thanks again.

#47 Starman81

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Posted 07 March 2013 - 12:54 PM

Interesting! This looks like it would be a great grab and go scope. I don't have any mount for it.

What would be a good but simple mount for this scope? Something like the mount in the op photo? What is that one?


The mount is the Astro-Tech Voyager as seen with the extension pier accessory. With this configuration, I can see up to the zenith without any issues. With the tripod legs fully extended, the eyepiece height is quite high, which I like since I am 6'2" and can standing up without having to bend at all. You do have to be careful that you don't accidently bump the setup, especially at certain angles as it can tip over due to the uneven weight distribution. Overall though, great mount and a nice setup so far. The problem is that the mount (and extension) are tough to get new. Astronomics had them on backorder most of last year, now both items are on a wait list. Best bet is the used market.

#48 Sarkikos

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Posted 07 March 2013 - 01:32 PM

I have the AT Voyager mount and extension. The extension is useful - maybe necessary - for some longish telescopes that might hit the mount when pointing toward zenith. But the extension adds appreciably to the weight and cumbersomeness of the Voyager mount. That's not good for optimal grab-n-go. I'd rather leave the extension off if I can.

One way to get around needing the extension, is to mount the OTA higher up on the dovetail saddle. Then the bottom end of the OTA will clear the mount when the scope is pointed toward zenith. I was able to do this for my 5" f/5 Newt OTA, but I had to add some weight toward the bottom end of the OTA as a counterbalance. Hopefully I'll be able to do the same for my 6" f/5 OTA.

By the way, I like to sit when I'm observing. I was able to do that with my 5" f/5 scope.

Mike

#49 KerryR

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Posted 07 March 2013 - 03:10 PM

Do you have any interference issues on that Versago?


It cannot go 90 degrees, maybe 80 degrees if my memory serves me well. It is like a dob on a tripod and with degree circles. Very smooth, light, transportable and easy to use.


Got it. Thanks.

Tube interference is something I find difficult to resolve with 6" scopes on grab and go type alt-az heads and tripods.

I have a Unistar on a heavy duty surveyor tripod that works perfectly with my 6" f5, but not with my 6" f6. On the f6, the tube hits the mount near zenith, and the ep is just out of standing height (tall tripod, even compressed, for refractors). Funny how much difference f5 vs. f6 can make...

#50 BoldAxis1967

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Posted 07 March 2013 - 05:55 PM

I should have added to my above comments regarding your conclusion that “a diligent observer could occupy himself for years with this scope” is true, and that I have enjoyed this scope immensely.






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