I am really fascinated by capturing really really low mag stars and then finding them on charts and researching their properties, details, etc . That and planetary imaging is all I ever do in my astroimaging. No widefield stuff.
With my 150mm MAK, I am starting to hit a limit at mag 17.5 .. ish stars . I want to go even lower. Changing the scope is not an option for me (I travel a lot and it has the perfect, weight, resolution and mirror size for going into luggage). The only improvement I can think of is upgrading the camera ... Currently I have a Cooled Colour CMOS and I was wondering if mono luminance camera can help me get fainter stars?
Below are the specs I'm thinking about. I want a cam specialized at really narrowfield stuff - as I normally select an study just a few stars at a time. Shipping & Customs add to about 200% where I live so I do not want anything not needed.
Monochrome CMOS Sensor : I'm assuming point objects like stars also throw out different wavelengths and Mono will help collect more starlight in shorter times?
Backlit Sensor: I am assuming it will also help collect more starlight?
Small Chip : I am going for very, very narrow starfields ... so FOV has never been an issue for me.
High well Depth: So that I do not oversaturate my images with brighter stars
Uncooled camera: I'm not going for diffused objects. Until now, stars always stand out pretty obviously for me, no matter if I have the cooling on or off. Especially when I select best pixels during stacking and then invert the image. I'm quite sure going 1 or 2 mags lower will be okay for me, with the noise.
Are the above choices correct?
Finally, is there anything which can help with atmospheric seeing to resolve fainter stuff ? I usually always image objects above 50 degrees. Will an ADC help me get fainter stars?
I will really appreciate your support with this. Thank you.
Edited by Agreegator, 23 September 2021 - 01:15 AM.