Originally posted by paperbag846 I have a lot of trouble focusing the A50 1.7. You might want to consider a split prism focusing screen like you had in the film days... because these digital ones make the DOF look larger than they actually are!
Although, you likely shot have shot at f2-2.8, but I would still consider the focusing screen. The lens tends to be razor sharp at 2.8.
EDIT: This lens is sharper than it's peers at f1.7, but not as sharp as a 1.4 stopped down to 1.8. I don't care for my A50 wide open.
Thanks! I'll try some shots at 2.8 next time, just to judge sharpness and keeper rate. Since I am accustomed to shooting f/2 and wider on a FF body, the DOF I get from a crop sensor at 50mm and f/1.7 is somewhere in the ballpark, but ultimately this won't be my go-to portrait lens. I have a 77/1.8 coming at the end of the week, and that's what I plan to use most often for this kind of studio work.
I may try a KatzEye one day, but I reeally don't want to. Though I could probably get used to it, my limited experience with them has been no great pleasure.
I don't know what the functional "aperture" of the stock K-7 screen is, but watching things pop in an out of focus through the VF, it seems like it's better for manual focusing than the D3's VF, so I have high hopes for getting to the point where I can shoot MF lenses without changing screens.