M8 DSLR vs QHY

[graham.hobart]

Greetings, thought I would post same scope but different cameras. Namely Canon 60Da no cooling - Exif was 19'c even though ambient was 8''c. Exif dropped to 17'c after a while. Same scope and QHY 8 OSC. Same night. This has a TEC cooler but no control for cooling.
Air was 74% humidity. with a Moon heading towards it's last quarter..
I tried same objects but had to adjust for sensitivity.
Lagoon 60Da- Messier 8


and then QHY 8 OSC



oh and here is some grus Galaxies with the qhy

dslr was 3.4 hrs. QHY was about an hour between clouds.:shrug:

[silv]

Thank you for the comparison, Graham.

Why is the FOV sooo much smaller on the Canon chip?

[graham.hobart]

I think, from experience- it isn't, but I think I cropped more.
My own feeling was that the QHy 8 gave a 'warmer' vibrant sort of glow to the stars. They were post processed much the same. I have to say though- if someone comes up with a cooled DSLR mod that doesn't involve hours of tweaking (I have a shed corner dedicated to old TEC and heat sinks!), and doesn't weigh a ton- I am in.
Having said that, The QHY - I really like the colour representation so juries still out here.
:question:

[silv]

in these adjusted images, judged from the color alone, I prefer the Canon version. because it is less yellow and the stars show their different tones better.
I'm a "winter color type" - yellow tint (summer type) doesn't suit me, makes me look pale. Maybe I have developed an aversion against yellow over the years. I prefer blue tints.
:)

[gregbradley]

There's an Orion cooling box that is not that expensive. It cools the whole camera and encases it. It sounds like a really bright idea.

Also you should use a power supply fake battery setup. Discharging batteries give off heat and will add to the temperature of the camera.

Greg.

[Ross G]

Nice photos Graham.

Yes, a cooled, current model DSLR would be the ideal all purpose astrocamera.

Good luck.

Ross.