Learning Astrophotography: Andromeda

[GMPhotography]

 

Andromeda M31 shot with Pentax K3II and William Optics ZS 71ED APO 20th Anniv. edition.

Stacked in Beta of Starry Sky Stacker finished in Affinity Photo and Lightroom.

Made from 11 images x 3 minute exposures, ISO1600, f5.9, 418mm

 

 

GREG6874-compositewhite by Greg Murray, on Flickr

[jer]

Nice! Just wondering what magnification if any is in your photos, in terms of telescope "X" like 1X or 2X or 10X. Maybe that info is in the 418mm if I knew how to convert it.

So, from 1st image to last was minimum 33 minutes causing all the objects to show elongation from universe motions and earth rotation, right? Except in Canada, being north, you are spinning fewer miles per second than someone on the equator, I guess. Hmm, I better stop thinking now as my spinning head is starting to hurt.

(Looking upward)

[GMPhotography]

No magnification in terms of how you'd usually think of a telescope. It's behaving as a straight up 418mm lens at this point, mounted directly to the camera.
Not sure I understand the wording in your second question. I use a proper astronomy tracking mount to negate the earths rotation, and it doesn't matter where you are on the earth, all stars will rotate at the same speed, if there is any difference, it's negligible.