1: Introduction, why use this lens?
Lately I bought a used transportable mount, the Star Adventurer,
it was broken but after two weeks of work it's repaired. Now I need some high quality lenses to it.
I can't have my 5" 680mm APO refractor, it's too far heavy for this lightweight mount.
Among all things I collected under all years I have a Sigma APO 150mm f2.8.
I liked it very much and used it to ordinary photo, I feel this lens is of high quality. But will it work for astronomy photography?
Is it sharp enough?
Not too heavy? I have a full frame Canon EOS 6D DSLR camera to it, will that give me vignetting problem?
Here I have done a very simple test of the vignetting of the lens.
It's taken as jpg photos so it's not linear but will give some ideas about how it vignettes. I also did a simple test if corners are sharp enough.