This time I tried 20m subframes (polar alignment not good enough — much field rotation) and settled on 10m subframes (lots of detail but no star trails). I forgot to change the number of subframes when I switched, so it came out to 18 frames total, 3 hours of data.
I could have easily done 2 more hours of data and chased the sunrise. Oh well.
3 hours is a lot of data for one object. The result has a lot of depth of nebulosity and a lot of intricate detail, considering the huge image scale. I am going to have a lot of fun with narrowband this summer.
As well as the DSLR is doing so far, there’s something to be said for a dedicated astrocam for narrowband. With the same scope and exposure, I am getting a noisier image than people who are shooting with astrocams. This will not stop me from continuing, of course.
Here is NGC7000, The North America Nebula. 3 hours of data (18×10m).
2 thoughts on “Another attempt at NGC7000”