How to improve my Andromeda image?

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NeedSomeHelp New Member • Posts: 7
How to improve my Andromeda image?

Hi all,

my first serious attempt to take a good image of andromeda with my normal DSLR + photography gear. However, my image came out poorly and I could use some tips. I have followed this tutorial: https://www.youtube.com/watch?v=pXcRKoxTPVg&t=1233s

I used:

Canon 80D, stock (iso 3200 and a shutter of 2s)

Canon 100mm f2.8 Macro USM (@f2.8)

Tripod and the internal intervalometer of my camerabody

SiriL for the processing

I took:

around 370 light frames (should have been more but something went wrong..) every 80 pictures I reframed and refocused on the andromeda galaxy, then took another 80 pictures.

75 bias frames

10 dark frames

25 flat frames

Regarding the ISO, the tutorial mentions a chart (https://www.photonstophotos.net/Charts/RN_e.htm) and picking the ISO that marks the start of this chart "levelling off". For my camera (80D) that would be at ISO 5091. Isn't that an extremely high ISO? For this reason I used 3200, which is the same ISO used in the tutorial. The image shown here is directly after SiriL-based

stacking, after slightly cropping the image.

Canon EOS 80D
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