Thoughts on a ZWC OSC for use on an 11", f/10 Cassegrain - Forums

Topic starter

Feb 14, 2022

Hi all,
Just looking down the road, I'd appreciate thoughts on what ZWO model OSC camera would work best on a full f/ratio 11" Celestron Edge HD. I currently have an ASI 183MC Pro on my 80mm refractor, but arc-second-per-pixel ratio wouldn't be correct, I believe. I'll certainly keep using the QSI 683 mono with filters on the 11", but would like some long-term suggestions from any users of similar equipment.

Many thanks,
- - Steve

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Vitali

Feb 14, 2022

Hi Steve,

I've used ZWO ASI071 MC and now I have ASI2400 MC with an EdgeHD11 scope. Both cameras worked very good. Of course ASI2400 is much more sensitive and better suited for an EdgeHD 11. The pixel scale of ASI2400 is 0.435"/pixel at 2800mm focal length.

IMO ASI2400 MC is the best ZWO OSC camera for an EdgeHD 11.

Hope this helps,
Vitali

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Steve Solon

Topic starter

Feb 14, 2022

Thank you, Vitali. That's actually the model I've been thinking about. Do I assume you bin 2x2, or keep it at full 1x1?

– Steve

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Vitali

Feb 14, 2022

I always image at 1x1 and process my images at the native resolution (6Kx4k). But often I downsample the final image, if the object is large enough.

In my gallery some images have pixel scale 0.435 and other 0.87"/px.

Vitali

andrea tasselli

Frequent contributor

Feb 14, 2022

I do hope you have a very dark site to image from. At that pixel scale. And very good seeing too.

Gernot Schreider

Feb 15, 2022

I found this article very helpful for deciding which camera to match to my equipment

https://diffractionlimited.com/matching-camera-optics/.

Cheers
Gernot

Steve Solon

Topic starter

Feb 17, 2022

Thank you all for your input - now it's time to do some thinking (and saving!)

- - Steve

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Eric

Feb 18, 2022

I have the 2400MC as well and it is excellent on the 11 Edge. I typically bin 2x2 with ok seeing and go 1x1 as seeing improves from good to exceptional. it works well with the .7X reducer as well with just minor adjustments in binning.

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Steve Solon

Topic starter

Feb 18, 2022

Thanks, Eric. Until the 2400 decision, I'm going to put my 183MC-Pro on the 11" for some experimentation - smaller pixels, yes, but we'll see what results come about. This whole thinking is coming about from a desire to get results sooner (I'm 65). Depending on weather, fire smoke in the summer, etc., I can spend months or even a year getting all the LRGB and Ha data for one object. Yes, the pleasure is in the acquisition, to be sure, but if I was 30 years younger, there might be more time. As it is, there are a few restrictions that are raising this consideration. OSC captures would certainly reduce the number of days, weeks, months, etc. it takes to acquire all the data. If things work out, I'll certainly keep the QSI 683 for H-alpha work on the 80mm APO, etc.. We'll see.

- - Steve

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Eric

Feb 18, 2022

Oh heavens I get it! I learned first hand what smoke can do when I lugged most of my equipment across the country to Yellowstone last fall only to not see the sky with my eyes let alone a camera. I think you’ll do very well! It’s all about expectations and for me I can still see any image in the sky and feel absolutely joyous that I’m standing in my backyard, looking at things Carl Sagan captured my imagination with 35-40 years ago. Clear skies and good luck!

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Torsten Mueller

Feb 21, 2022 · Edited: Feb 21, 2022

I would give another upvote for the ASI2400MC.
I decided to use it on a 12" RC with 2000mm fl as an upgrade from the ASI294MC in terms of FoV and noise issues.
and i'm super happy with it. Yes its really pricey, but works like a charm! Very good dark signal and overall performance.
Nearly a perfect match for those long FL scopes.

The ASI2400 as mono would be awesome…

Cheers
Torsten

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