Archived posting to the Leica Users Group, 2002/05/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Tue, 21 May 2002 08:15:00 -0500, "Eric" <ericm@pobox.com> wrote: >Paul: > >>I tightened up my procedures and picked a section of the neg closer to >>infinity to examine. Lo and behold - there's just no dang difference. >> >>http://www.chefurka.com/Misc/BackFocus.html > >I'm not interested in disputing your results. I really don't care if there >is a difference. Many people in real life seem to get great performance >with the Hexar + Leica lenses. Only way to know for sure is to try it for >yourself. > >I would dispute your conclusion that this closes the case. There are too >many variables. It could be that your rangefinder or rangefinders are >slightly out of alignment. Could be that your way of focusing favors the >Hexar slightly. Could also be that the Hexar is superior and your focusing >favors the Leica, making them both look similar. :) That's why I did the test at infinity - at least that takes focussing technique and the RF mechanism out of the equation. I should have qualified my statement - this closes the case for me, using my cameras and that particular lens. >That's my main objection to a "test" like this. If it's not scientific, it >doesn't really answer anything for other people. Only for the tester. >Everybody's technique is slightly different. The only way to answer the question for everybody is to test a statistically significant sample of cameras using an accepted valid technique involving only that single variable. That ain't going to happen in user-land. So all we have to go on is the accumulation of anecdotal reports. Mine is just one of those data points, nothing more or less. >If they look fine on the light table, I wouldn't worry about trying to >measure something that's so hard to measure. :) That's my feeling exactly. Frankly, where the Hexar is concerned, I'm much more annoyed by the quality of the finder, the shutter delay and the misloads I keep getting than by any possible back focus problem. Paul - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html