Hallo Leute,
an diesem Aufsatz, den ich von Cameraquest kopiert habe, seht ihr, dass nicht nur Erwin Puts sich über die Kompatiblitätsprobleme zwischen den Hexar-Objektiven und den M-Leicas und Leica-Objektiven an Hexar RF gewundert hat.
Ich fand diesen Aufsatz in
http://www.cameraquest.com/konicam.htm
"Some Hexar RF users report focusing problems with Leica M lenses, others do not. How could that happen?
The EXACT cause of this is a hot source of controversy on the net. Konica is not helping the situation. So far, I have received different answers from every Konica employee I have discussed the issue with. Konica USA offered to adjust the rangefinder of my camera, but admitted this would not be a complete solution. I am told Konica UK actually offers to correct Hexar RF bodies to Leica M specs, for a fee. Konica USA seems to give me a different answer every time I talk with them.
Some people swear nothing is wrong with the Hexar RF with Leica M lenses, because THEIR camera has had no problems. Others report focusing problems. Personally MY Hexar RF did NOT have correct back focus specs for Leica M lenses -- I had it repaired.
I believe the KEY to the controversy is the INCONSISTENCY -- some people have back focus problems, others swear THEY do not. How could that happen?
As suggested to me by a Konica insider, the answer may be the plus/minus tolerances used by Konica. In this scenario, depending upon how a particular camera body's set of parts tolerances add up, that particular camera MAY or MAY NOT exit the factory with back focus specs within Leica lens tolerances. I am not sure this is the solution, but I know of no other explanation which satisfactorily explains the inconsistent results reported by Konica Hexar RF shooters.
Some internet sites make a seemingly strong argument that there is NO Hexar RF back focus problem. Ask yourself a few questions before you buy into that line of thinking:
1. Hexar RF problems came into the public eye because SOME, not all, Hexar RF owners definitely were not getting sharp shots with the same lens on their RF, as they were from Leica bodies. If there was no problem with the RF, what was the cause of these focusing problems?
2. If there is no problem, why does Konica UK offer a repair service to adjust Hexar bodies to focus Leica M lenses?
3. If there is no problem, how did the Konica factory correct it on MY Hexar RF?
4. If there is no problem, why hasn't Konica publicly said the Hexar RF is fully 100% compatible with Leica M lenses? This controversy is obviously hurting Hexar RF sales. It would be to Konica's advantage to deny it and put the question to rest, IF there was no problem. Instead, Konica has publicly side stepped the issue, saying that the Hexar RF is compatible with the Konica "KM" mount. I interpret Konica's stance as another way of saying "We are not promising Leica M compatibility, because we don't want to pay for a camera recall."
5. Do you see any of the sites claiming there is no problem, offering to buy back or repair Hexar RF's bought on THEIR recommendation which turn out NOT to correctly focus Leica M lenses?
If you own a Hexar RF, or plan to buy one, I suggest taking it to a Leica repairman, and have them check the film plane and focusing accuracy, just to be sure -- ideally with both Konica and Leica mount lenses.
Quick and Dirty Hexar Back Focus RF test: With your RF mounted on a tripod, focus wide open and close up with your fastest available 85/90 and 135 lenses, as well as wide open and close up with your widest available lens. As a control point, shoot the same shots with a Leica M body you know to be in good shooting condition. Compare with a loupe. IF the results are identical, wonderful. IF you get different results with the same lens on different bodies, consider having the back focus of your Hexar RF checked."
Gruß, Jochen
