I have an use a 183MM for my GT81IV and flattener combo. Been having the upgrade itch lately, but not really ready to let go of a "working" system (figured out my issues from previous threads, dont use Gain 0) unless I can find something that does not compromise too much.
The William Optics GT81 only has a dedicated .8x reducer flattener, and the Hotech SCA did not work for me to work at its native FL - stars were very pushed in, yet since it was not adjustable I was stuck. So I have the Flat6A and am working at a 382mm F4.7 imaging system. The 183MM has 2.4 micron px and is a 1.24"scale.
With this scope, seems like the 183MM is kind of what I am stuck with. The 294's large pixels are great, but will definitely net me a softer image, the 1600 is cool but old and doesn't offer much above the 183MM - at least as far as I can see. I could be wrong!
Can someone chime in with what they are using currently?
I got 2 cameras, and I am torn between the 2 which one to use, both have their advantages and disadvantages.
QHY183C - It's the same sensor as your 183MM, but in color. I like how sharp subs it produces, but I don't like how it's only 15k welldepth.
ASI533 - square shaped sensor, nearly more than 3x the welldepth of the 183 but larger sensor size and produces softer images.
Using both with small focal length refractors (560mm and 360mm) stuck on top of each other on my mount, I did some imaging and while taking subs with both of the same target, I still couldn't decide which one I liked better!
Both still had edge over the other in different criterias.
At the end of the day, I realized that I'm still not taking full advantage of either cameras' capabilities, but I'm slowly learning how to bring out the best from them and it's a lot of trial and error.
Forums and social media can only point me to a direction, but there are no rules carved into stone to follow , because sky and conditions and equipment are always different.
If there is one rule I would carve into stone is that sky conditions are always different and require adjustments, even with the same equipment from one night to the next and cannot depend on what worked for someone else to work the same way for my setup and current conditions.
It comes down to setting up my gear what worked before, take a sub and look at it and take an educated guess whether it's gonna work or needs adjustments. The educated guess is the key, meaning - to know if I change a certain aspect - gain, exposure length, filters, or even the scope itself- what direction that's gonna take me and how it's gonna effect my imaging capabilities.
Edited by unimatrix0, 10 April 2021 - 12:03 PM.