Slr Camera Lens Adapter Works Great. Will My Telephoto Sigma Lens That I Have Been Using On My Film Camera Fit On Any Digital Slr Camera? ?

Will my telephoto sigma lens that i have been using on my film camera fit on any digital slr camera? ? - slr camera lens adapter works great.

I want to buy a digital SLR camera, but the use of my current target. I need help to understand how to recognize whether they have the right size. If this is not possible, there is some kind of adapter to make this work? Thank you! :)