I have a prime Sigma f1.4 50mm lens on my Nikon D90 in P mode and focus mode on a set point of the field and notice that when I am using a tripod and change the f-stop that the camera changes the ...
I've been using the Pentacon 50mm f1.8 with pleasure on my Canon 550D with the help of a M42 to EOS adapter. Some weeks ago however the lens housing got damaged in my luggage such that turning the ...
Recently switched from a D3s body to a Df body. My 50mm f1.8D worked perfectly with the D3s, now doesn't seem to be working on the Df. (I'd rather get rid of the bulkier special edition 50mm f1.8G ...