Archived posting to the Leica Users Group, 2001/05/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The topic of the difference in film register between Leica and Konica gives some insight into the working of the Lug and the level of image quality Leica users are willing to accept or demand. When presented with my facts (K=28.00), the response is as to be expected: to kill the messenger(Puts has no qualifications (Stephen Gandy), to question his sources (Dante Stella: I do not trust the person from Germany), to diminish to impact (Cummer family: I do not see any difference, therefore none exists). Then Dante Stella calls a repair person in New Jersey with identical info and now it is credible ! Were is Stephen Gandy to question the status of Dante Stella: does he have 20 years of engineering experience which is Stephen Gandy's limit. Then the Cummer family does a quick survey and finds that from 15 individuals 15 are happy! Therefore there is no issue! Of course if I had done such a survey Stephen Gandy would have asked for my 20 years of experience in social surveys and statistical methodology. Any one knows that a survey based on a non-random sample is worthless, especially as the main criterion: image quality is not all defined in a way that is repeatable with a control group. But the results will without any doubt please the group that will deny that there is an issue. What we have here is the very classical case of negating the evidence, which started with the burning of the scientists who claimed that the earth is not flat (contrary to common sense), the earth moves around the sun (again), that atoms are the basics of the fabric of our universe, that ours is a relativistic universe etc. At stake is the reputation of all those journalists and dealers who claimed that the statement of Konica that their mount was not identical to the Leica M-mount, was just a figment of the imagination to circumvent possible legal actions by leica (which were unlikely as the patent had been expired as amply documented). Here we have a unique case: the manufacturer (who in most cases knows best) says that his product is not fully compatible with that of a competitor. This is denied by many individuals who without any facts other than a quick scan of the fitting of the lens and some pictures declare that the manufacturer is wrong. As soon as it is established that indeed the manufacturer has been right all the time the full barrage of user experiences, fact negating, semantic word twisting is brought in place. Bottom line the issue is more fundamental: there is without any doubt a difference between the film register of a Leica body/lens unit and a Konica body/lens unit and mixing these systems brings incompatibilities and a drop in image quality. If some argue that they do not see this difference, does that proof there is no difference? Beauty is in the eye of the beholder, someone of lost fame wrote in the past. I would paraphrase: "image quality is in the eye of the photographer". The classical discussion about which lens is best (Summicron DR or current one) can be illuminated by the insight of the Konica/Leica compatibility issue: if you do not see a difference, it does not imply that there is no difference, but that the standards of image quality/optical performance need to be upgraded or redefined. Quoting from Zeiss for once: if a lens has a potential of 100%, most users would have trouble extracting 50% of that. To extract 80% or more needs considerable expertise and years of experience. If the Konica/leica incompatibility will reduce image quality significantly but not enough to get below the 50% threshold with which most users seem to operate, all is fine? In a wellknown German book (by Mr Scholz) the author fitted a Leica body with a simple glass element from his spectacles (he could have used the bottom of an empty bottle of whiskey with equal results) to prove that a simple meniscus (box lens) would suffice for highly acceptable image results. The resulting picture is very convincing. As long as we seem unable to differentiate between a 9 element super quality optical system and a simple spectacle glass in front of the M-body (or Konica body) why question the impact of a mere 0.2 mm of defocus. Would it not be time for a re-calibration of our standards of image quality? Erwin