With my current astrophotography setup it is not possible for me to capture the full andromeda galaxy in one picture.
- Telescope: Celestron C8 SGT XLT (f: 10, focal length: 2003mm)
- Mount: Celestron Advanced VX
- Camera: Canon 7D Mark II (EOS)
- Optics: f/6.3 Barlow lense (reduces f to 6.3, focal length to 1200mm)
So now I am wondering, what if I mount two f/6.3 Barlow lenses behind each other, will the focal length then get multiplied by the factor 0.63*0.63=0.3969?
This way it would be possible for me to capture some of the wider entities.
The base magnification with my setup (with no barlow lenses) is at around 80x.