I have a question to all you manual focus lens experts.
I recently bought the wonderful Rokkor 58mm f1.2 lens for my Canon 5d2 and I noticed that it's really hard finding the focus through the viewfinder. I decided to point the camera towards a tape measure, using f1.2 and 0.6m distance. I found that the lens consistently focuses about 2 cm closer than visibly indicated in the viewfinder (Ee-S focus screen). It did several tests and I don't have an idea if there's anything that I can do about it.
I'm new to the MF world and would appreciate any leads on how to fix this.
I had the same problem with mine; the position of the focus screen needs to be adjusted.
- when I first installed it, the defocus was obvious - I was using AF but it looked visibly OOF in the viewfinder - however the shot taken was sharp, so the AF had it right
Turns out the focus screen wasn't seated properly, I just took out the focus screen, and reinstalled it, and the problem was fixed. Washers/shims are an option if that doesn't work
I checked the focus screen and it seems to be installed correctly.
I then did a test with thin layers of tape and an old focus screen.
I think I need to move the screen up a tiny little bit...
HawkEyeMedia wrote:
hm... interesting. I do have the Ee-s focussing screen. The problem persists when I use the original screen that came with the camera.
Could be shimming. Mind you, the accuracy with the original focus screen will be off at f/1.2 anyways, as it is incapable of providing that small of a depth of field.
