Archived posting to the Leica Users Group, 2007/04/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jeffery It's the digital rangefinder cameras that allow to check the focusing accuracy much better and quicker than with film cameras. But the problem is old. I guess every RF lens always had it's own tolerance and focusing behaviour. Past january I had received an email from a Robert White employee who told me about the focus accuracy tests they had made with some Epson R-D1. This test concerned focusing an object at 1m distance with open apertures, but I'm quite shure it would look similar with varied distances and aperture. Let me quote him: >...we also tested 6 different lenses in our shop, these lenses were a >mixture >of new and old and from several manufacturers. We were truly amazed by >the different results. A number of well known manufacturers lenses faired >poorly with regards to this problem. Didier >>I suppose that I should set up some sort of contraption to find the "soft >>spots" on all of my lenses. It would have been a prohibitive pain in the >>ass >>without the M8. But the test I ran on the Nikkor tells me that if I took a >>portrait of someone at 5' and at f/5.6, her eyes would be out of focus. >> >>For now, I think I need to decide which one of my 28's, 35's, and 50's will >>reside most of the time on my M8 and test them. >> >>Jeffery Smith >>New Orleans, LA