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Your favorite 90mm Mak?

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115 replies to this topic

#51 Jaimo!

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Posted 14 March 2021 - 06:14 PM

Does it really makes sense to get a slower telescope for planetary imaging? I mean, can't you just use a barlow lens to slow down any fast telescope?

You are absolutely correct.  Most planetary imagers are using larger SCT's with barlows to achieve f/ ratios of 20+ depending on the camera and seeing conditions.   

 

I was also trying to steer the topic back to the C90 and the OP's original question...


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#52 Mitrovarr

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Posted 14 March 2021 - 08:22 PM

That's exactly what I do when planetary imaging. I was worried there was some downside I didn't know about.

#53 Mitrovarr

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Posted 14 March 2021 - 08:24 PM

That's exactly what I do when planetary imaging. I was worried there was some downside I didn't know about.

#54 M5-ST

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Posted 16 March 2021 - 07:43 PM

I have to go with the vintage C90 1000mm I do not have any of the newer maks at this time I am sure from all the reviews and talk here on cn that they are very very good maks and I hope to get one down the road, for me the vintage models have some good points- metal construction, compact size, little bit wider fov, easy to transport, unique look. I own two of these a late 70s mirror lens and a early or mid 90s rubber armor model, both give great views the mirror lens model is a little better but the rubber armor model is easier to focus!!!



#55 barbie

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Posted 17 March 2021 - 08:42 PM

I've already split many brighter double stars with my present day 90mm Mak. This Summer, I will be using it a lot for this kind of observing as well as for the moon and planets. It does everything a 90mm aperture long focal ratio scope is supposed to and it is well built mechanically and excellent optically. It is a Bushnell Northstar 90mm F14 Mak and is a clone of the popular C90 present day model.


Edited by barbie, 17 March 2021 - 08:55 PM.

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#56 infamousnation

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Posted 18 March 2021 - 11:09 AM

Buy several and keep the one you like best, they are so cheap! Let kids use it to look at the moon, saturn, Jupiter. 


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#57 barbie

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Posted 19 March 2021 - 08:58 PM

I was observing the waxing crescent moon Friday evening with my 90mm Bushnell Northstar Mak and the views were razor sharp at 208X!! Truely a delightful scope to own and use!!



#58 barbie

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Posted 20 March 2021 - 09:07 PM

I had an absolutely sensational evening Saturday with this little Mak!! I had excellent seeing and transparency and got views of the moon and a few double stars that rivaled many small ED refractors I've owned and used in the past!! I will not be parting with this 90mm Mak!! It's definitely a keeper and lighter than a 90mm apo.
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#59 erin

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Posted 20 March 2021 - 11:05 PM

You all have me wondering if my 90mm f8.8 achro needs a 102mm mak to do the heavy lifting on planets when I’m too lazy to take out the 8”....??? I know, this thread is about 90’s, but wouldn’t the 102 mak be more equivalent to the 90mm achro?

 

This place is dangerous! grin.gif


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#60 Jaimo!

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Posted 20 March 2021 - 11:29 PM

barbrie, 

I know what you mean, I was out this evening imaging the moon with this tiny titan, C90.

 

PXL_20210321_011721357 - small.jpeg

 

Lightweight/Mobile Solar System Imager:  C90, Omegon flip mirror, Svbony SV305, Old CG-5 ASGT, Talent Cell Battery.

 

Jaimo!


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#61 Mitrovarr

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Posted 20 March 2021 - 11:44 PM

Wow, so much mount and so little telescope! Those setups always amuse me (although they are perfectly sensible for imaging). I had my AT80ED on my AVX the other night and the setup just looked goofy.



#62 Jaimo!

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Posted 20 March 2021 - 11:52 PM

Don't Laugh....  C90 on CGEM, it's rock solid...  This is the rig I photographed Jupiter on the previous page.

 

C90 on CGEM - small.jpg

 

In all honesty, I want a go-to mount for even basic astrophotography, the Celestron 'All Star' Polar Alignment tool included in the go-to software is a key to my polar alignment and keeps the planet or moon in frame.  It's not perfect, but good enough for a few minutes of video recording for planetary.


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#63 Jaimo!

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Posted 21 March 2021 - 03:21 PM

Here is what I did last night with the C90.  HERE is a link to the full size image, it is WAY is too big to upload, it is my first mosaic.

 

Celestron C90, SvbonySV305, AS!3, GIMP

 

Moon Moasic 20-Mar-2021 FINAL2 - small.jpg


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#64 rocketsteve

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Posted 25 March 2021 - 02:17 PM

I took this afocal moon pic with my Orion StarMax 90 about 15 years ago. Really nice scope and sharp optics...

 

Moon 009.jpg


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#65 ETXer

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Posted 25 March 2021 - 03:13 PM

I have 3 90mm Maks, a 1965 Questar Quartz Standard, a Meade ETX-90EC, and a vintage orange C90 Astro. I love them all for different reasons, but for all their plusses and minuses they can all deliver outstanding views and results

 

I like the Q for its versatility, especially when it comes to ease of setup, especially for imaging. It's optics are the best of the bunch.

 

50451476376_cc784212fc_n.jpg

 

50518205586_21f2b85ec1_n.jpg

 

I like the ETX-90 for its ease for travel and minimal accessory requirements; I can set it up on a picnic table and start observing or imaging after a 2-minute alignment procedure. And its optics, while not quite as bright and contrasty as the Q's, are most excellent.

 

49955615098_853f5ab509_w.jpg

 

Last but not least is the no-frills vintage C-90, also a quick scope to set up. It's so light and yet it's practically bulletproof. And its optics can hold their own as well.

 

49945478002_812f194a51_w.jpg

 

The winner? It all depends on my goals on any given day, which is why I still have and will keep all three. ;)


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#66 Nicole Sharp

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Posted 26 March 2021 - 03:43 AM

I really like the 1000/90 (f/11) Omegon MightyMak, though I have not used any Maks other than that one.

 

https://www.omegon.eu/p,48702/

 

https://www.nicolesh...p-casino-resort

Attached Thumbnails

  • IMG_20210217_145319446_HDR-small2.jpg

Edited by Nicole Sharp, 26 March 2021 - 04:51 AM.

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#67 barbie

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Posted 28 March 2021 - 02:21 PM

I enjoyed some high magnification lunar viewing Saturday evening with my Bushnell Nortstar 90mm Maksutov. Great little scope for moon, planets and double stars!!
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#68 GreyDay

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Posted 28 March 2021 - 02:29 PM

I've had a few 90mm Maks over the years, two of the old Celestron orange tube C90's and a Skywatcher 90. I also have a Skymax 102 which is the only one i've kept, this is a clear indicator of performance. The Skywatcher 90 gave a better view than the C90's and it was also easy to collimate. I haven't tried the new C90 but all reviews rate it highly.


Edited by GreyDay, 28 March 2021 - 02:30 PM.

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#69 RichA

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Posted 28 March 2021 - 05:54 PM

Quite a few options out there from every mfgr in this class but I’m looking for the best optics for Lunar AP. I think it’s safe to say we can cross Questar off the the list as it’s just waaaaay to expensive. Was thinking Vixen might be a quality scope but user reviews report very soft images and focus.....what’s your experience and thoughts on these gems!

ETX Field Model.  No crappy plastic, squeaky mount but excellent optics, near as good as Questars I've owned and highly consistent from one to another.

Well-built (the plastic mirror housing masks a fully aluminum, machine mirror cell) and light as a feather.



#70 barbie

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Posted 29 March 2021 - 08:02 AM

My Bushnell 90mm Mak is optically very close to many Questars I've viewed through and mechanically well built with the only plastic part being the rubber ring around the focus knob. Collimation adjustment is very easy and the collimating bolts are easily accessed on the back of the primary mirror cell. While it doesn't have the built in clock drive or super refined craftsmanship of the Questars or ETX, it does an excellent job on the moon,planets, and double stars under good seeing conditions. I've been able to use just over 200x on excellent nights. Extremely pleased with the razor sharp images this little gem produces!! My Synta made C90 from five years ago was just as good as are all of the 90mm Synta Maks I've viewed through so these seem to have high quality consistency as well, at least that I've seen. 90mm seems to be a sweet spot for these Maks.


Edited by barbie, 29 March 2021 - 08:40 AM.

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#71 tombaty

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Posted 31 March 2021 - 12:34 PM

What about the Orion 90 MM Mak. How does that compare to the C90 in optics and build quality. The Orions are more costly than the C90 are they worth the extra bucks or all things considered about the same.????? Looking for a small portable scope to use in a semi light polluted area. I am a 79 year old guy so I want it kind of inexpensive light and easy. Been in astronomy since I was 10 so yes I have had big dobs and Televue but I have to limit myself now. Your advice is appreciated.

.



#72 barbie

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Posted 31 March 2021 - 05:03 PM

Hi Tom

The Orion 90mm Maksutov is an excellent choice and will be perfect for your needs. It's made in the same factory using the same optics as the C90. Hope this helps.

Barb

#73 Nicole Sharp

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Posted 31 March 2021 - 05:04 PM

What about the Orion 90 MM Mak. How does that compare to the C90 in optics and build quality. The Orions are more costly than the C90 are they worth the extra bucks or all things considered about the same.????? Looking for a small portable scope to use in a semi light polluted area. I am a 79 year old guy so I want it kind of inexpensive light and easy. Been in astronomy since I was 10 so yes I have had big dobs and Televue but I have to limit myself now. Your advice is appreciated.

.

I still like 1000/90 better than 1250/90 (or 1200/90).  The shorter focal length makes it easier to use, and the faster focal ratio provides a brighter image (f/11 vs. f/13 or f/14).

 

Note that the C90 (as opposed to the 90SLT) cannot be fitted with a ring-style Solar filter, whereas the Orion Apex 90 (and 90SLT) can.

 

Unmentioned in this post so far is also the Bresser Messier 1250/90, the Omegon MC 1250/90, the iOptron MC 1200/90, and the Levenhuk MC 1250/90.


Edited by Nicole Sharp, 31 March 2021 - 05:14 PM.

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#74 CCD-Freak

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Posted 01 April 2021 - 09:41 AM

I recently picked up an USA made ETX 90 at a great price and I hope it turns out to be a good as I hear they typically are.  I found that one of my solar filers fits it perfectly so I plan to use it for solar as well as a compact travel scope.

 

DSC01607.JPG

 

 


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#75 Joe1950

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Posted 01 April 2021 - 11:14 AM

I have one like that, John. They are all optically exceptional. The idea making them back then and making the optics domestically was to compete directly with the Questar 3.5, and many experienced observers were very impressed. Of course the mount was no where near Qs quality.

 

You’ll like it I’m sure. Just check for the secondary baffle movement. That was a problem with ETX-90s from that time.

 

Enjoy!


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