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Which 90mm Mak for tiny Apartment and travel?

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#151 RafaelP

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Posted 11 January 2013 - 10:31 PM

Since I don't have a camera attachment for the C90, I did some pencil sketches last night. I used the sketches for a little oil painting to try to illustrate what Jupiter looks like through the scope.

Celestron C90
7:30 EST
Roof in Midtown Manhattan
x125 magnification using GSO 20mm plossl with a x2 barlow(I think!)
moons from left to right:
Io, Ganymede, Europa and Callisto

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#152 Quinn

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Posted 12 January 2013 - 03:19 AM

I've had a Orion StarMax 90mm for about a year now and have been more than happy with it. I purchased the tabletop mount with the 90º diagonal and the 25 and 10 mm Plossl e/p. Well on a table top the mount sucks. Pointing the scope to zenith and you'll be beating your chin on the table. The mount will screw on to a 1/4"-20 3/8"-16 photo tripod and that works well if the tripod is rigid enough. Optically I don't think there is a difference between the Orion or Celestron Maks.

I use mine mostly for viewing the Moon where it excels. With a tFOV of around 1º you won't be viewing many nebulas or open clusters. If the sky is dark Globs are wonderful.

Enjoy
Quinn

#153 t.r.

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Posted 12 January 2013 - 08:19 AM

Actually RaphaelP, that is a very realistic rendering viewed at about 8 inches from the screen! The right color too. The only thing I'm seeing additionally is a gradation in the polar regions which you show as just a solid shading,a more jagged edge on the two main belts and the ragged edges on the inside of the North equatorial belt where the gray/blue festoons begin to drift into the equatorial zone. I can't see the streamers of the festoons going into the middle of the zone by any means so far. You will just have to catch a time that the red spot is transiting...you will see that too! Your Jovian moons are portrayed slightly fuzzy...mine are nice, hard round airy disks with a single diffraction ring...at least when the seeing is good! Check out these Jupiter pics through the C90...

http://www.celestron...ting-scope.html




#154 azure1961p

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Posted 12 January 2013 - 08:37 AM

That's acrylic not oils. Nice job.

Pete

#155 azure1961p

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Posted 12 January 2013 - 08:40 AM

Why Mr. Barnett, it would appear you've shaved your beard and colored out the grey!

Pete

#156 RafaelP

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Posted 12 January 2013 - 09:31 AM

I will have to check again when the weather is good to see how I saw the moons! There may have had the single diffraction ring too. It was also I little less yellow and a more grey pinkish color. I attached another little Jupiter painting that I think is a little closer. It is oil on a 2"x3" panel.

Pete- It is oil paint for sure! I squeezed the paint out of the tubes myself. ;)

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#157 rmollise

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Posted 12 January 2013 - 09:56 AM

Since I don't have a camera attachment for the C90, I did some pencil sketches last night. I used the sketches for a little oil painting


Very cool!

#158 azure1961p

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Posted 12 January 2013 - 04:43 PM

And it's dry?

Pete

#159 RafaelP

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Posted 12 January 2013 - 05:06 PM

Pete- Nope, they are still wet. I just took some quick shots with my cellphone camera. They take just take several days to dry to the touch and several weeks to be completely dry.
R

#160 RafaelP

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Posted 23 January 2013 - 12:50 PM

I took to C90 to Los Angeles and finally felt I was able to put it through it's paces with some clear and semi-dark nights. I had been struggling using printed star maps (Cambridge, Turn Left at Orion)to find anything. I ended up downloading Sky Safari Plus which made star jumping so much easier for me. It felt a little more free form too.

There is a lot of light pollution in LA, and with the small aperture perhaps the views were not amazing, but here is the list of some DSO I was able to find:

NGC 457 - Owl Cluster in Cassiopeia
Andromeda Galaxy(I could fit the center bulge in at x56)
M 36 - Pinwheel Cluster in Auriga
M 35 in Gemini(it may have been the more compact NGC 2158 which is close by)
Hind's Crimson Star(hard too see due to LP!)
M 44 - Beehive Cluster in Cancer
M 67 in Cancer
NGC 2264 - Christmas Tree cluster in Monoceros(was unable to make out the Cone Nebula)

I was hoping to get some nebulae(besides M 42)but a narrow pass filter is really needed to separate them from the background LP. That is all for now!
~Rafael

#161 Cepheus Elf

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Posted 23 January 2013 - 05:39 PM

Great that you are using your Mak for deep sky observing!!! Too many people dismiss Maks as just " lunar and planetary" scopes which is just plain nonsense!!

Clear skies,
Mick

#162 Stephen S

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Posted 25 January 2013 - 09:56 PM

RafaelP, your paintings are fantastic! Don't know if I've ever seen astro items in oil. I love good art. The combo of oil painting and astronomy, just awesome!

By the way, I currently have a Questar I got in a trade. This post has convinced me to get the C90. Very interested (and a little scared) to try them side by side. Love the Questar but I could buy some really nice eyepieces for the price difference.

#163 jrbarnett

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Posted 25 January 2013 - 11:00 PM

Here's a 3-way shootout by Ed Ting featuring the Questar, C90 and Meade ETX:

http://www.scoperevi...0mmComparo.html

It'll be interesting if you reach similar conclusions. Looking forward to your findings.

Regards,

Jim

#164 RafaelP

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Posted 26 January 2013 - 10:17 AM

Thanks Stephen! The little painting was fun to do. I love the C90 and it traveled very easily as a carry on for 4 flights already.

I must say though that I am considering a larger scope that would also fit on the Dwarfstar(anyone have a C5 or C6 they want to sell?)
~Rafael

#165 jrbarnett

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Posted 26 January 2013 - 10:28 PM

You can get a brand spanking new C6 here for $400:

http://www.highpoint...n-C6-A-SCT-A...

The C6 is a big, little scope.

Regards,

Jim

#166 Stephen S

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Posted 26 January 2013 - 11:22 PM

You can get a brand spanking new C6 here for $400:

http://www.highpoint...n-C6-A-SCT-A...


Great price for a very nice scope! Alas, at 10 lbs, it might be a bit much for the Dwarfstar, especially after you add diagonal and eyepieces.

I totally understand the temptation to upgrade in size. I started with a 125mm Mak and two eyepieces. I now have six scopes ranging in size from 3" to 12.5" and three times as many eyepieces. Optically speaking, the 12.5" out shines them all (pun intended). That said, I find the small ones get the most use. Sold my 3" refractor and miss it dearly for this very reason. Very excited to be getting the C90 as a possible replacement.

#167 jrbarnett

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Posted 26 January 2013 - 11:51 PM

Hmm, that is probably too hefty for a Dwarfstar.

The C5 is just 6 pounds, but costs more at $449.

http://www.bhphotovi...5314&is=REG&...

Of course that also gets you a soft case with the C5.

Regards,

Jim

#168 RafaelP

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Posted 27 January 2013 - 12:14 AM

I emailed Larry at UA several weeks ago to ask. He said the Dwarfstar has the strength to be able to handle the C6 but to make sure the tripod can.

#169 Stephen S

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Posted 27 January 2013 - 02:12 AM

Nice! I have a Unistar Deluxe that I really like. Perhaps a Dwarfstar for my soon to arrive C90 makes sense...

#170 curiosidad

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Posted 27 January 2013 - 05:36 AM

Hello,
And you have not thought of a mak 4 "? Opening a little more, a little more resolution and not much more weight ..
regards
PD.: Many years ago I could use a Mak 3.5 ", later a 105mm (both ETX), and the latter was better!

#171 t.r.

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Posted 27 January 2013 - 08:21 AM

Hmm, that is probably too hefty for a Dwarfstar.

The C5 is just 6 pounds, but costs more at $449.

http://www.bhphotovi...5314&is=REG&...

Of course that also gets you a soft case with the C5.

Regards,

Jim


Why is this? I never understood the disparity in the pricing of these two scopes. The C6 clearly has more to offer for the money and IMHO is just as portable, although of different bulk.The C5 should be around $300 max or the C6 priced higher...that case apparently is pricey! :grin:

#172 moynihan

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Posted 28 January 2013 - 11:40 PM

Just had to chime in here re my C90 tonight. An unusually good seeing night, just now, for around here anyway. Jupiter at 178x was loaded with detail. Could see a pale dot as a moon began a transit (Europa i think). Ended up using a 6mm ortho (208x)no detail increase, just bigger image but still sharp. Ended up trying 250x without image breakdown. The scope is an absurd bargain.

#173 Crow Haven

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Posted 29 January 2013 - 06:43 PM

I'll jump in too! I used to have one of the older C-90's from 1986, but I don't think it was an especially good one and I later gave it to a friend.
With all the good reviews of the new model, and the incredible price, I bought one last year and have been really pleased with it! It's so portable (I also enjoy my C-5) and I never worry about it when traveling.
I use it with 3 different mts. An old Bogen 3246 tripod w/ 3063 panhead/ Scopestuff vixen saddle and Orion alt/az fine motion tripod adapter, a Voyager alt/az mt. w/pier extension, and sometimes the GT mt. (and Orion L-bracket)from a Nexstar 102 achro I picked up from Costco thinking about using the mt. with my PST (but have discovered the 102 achro to be a good performer as well). :grin:
The new C-90 delivers nice views and can't be beat at these prices IMO.
---Maya

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#174 Binojunky

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Posted 30 January 2013 - 11:28 AM

Well I had one and (like an idiot) sold it as I tended to use my Orion 127 mak.
Now I,m planning a trip so the C90 would be ideal, maybe end up getting a replacement?, DA. :shrug:

#175 t.r.

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Posted 30 January 2013 - 12:21 PM

This brings up a good question...many of us intend to travel with the C90, what then is the ideal travel mount? Lets say we want it and the scope to fit into a standard airline carry-on of 45" total. What would you all recommend? Remember the StellarVue "Route 66" travel kit...something along those lines. Ideas...






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