Archived posting to the Leica Users Group, 2017/01/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Peter, Two years ago I?ve sent to Leica my Summilux 75mm to be calibrated, and 6 bit coded. The service was very expensive but now it works perfect. I didn?t sent the camera. Lluis > El 11 gen 2017, a les 2:49, Peter Cheyne <peter.cheyne at gmail.com> va > escriure: > > I was beginning to feel confident that someone in the US could correct my > front focussing 90 Summicron (Canada). However, I got the following reply > from DAG Camera: > > thanks for the test shots with your leica lenses, your Summicron 2/90mm > lens is slightly front focusing. I'm sure if you took a photo w/your > Summicron 90mm of an object 20 meters away the results would be severe > front focusing. Its easy to say that your 2/90mm lens is front focusing, > however if you took 10 M9 cameras that were correctly adjusted & shot with > your 2/90mm lens you might get at least 3 different results. Perhaps 3 > lenses would give you front focusing, 2 lenses might give you accurate > results & the rest might give you something in between. That can happen > with lenses that are longer than a 50mm lens with the M digital cameras. I > would say that you would be better off sending your lens to Leica in > Germany. That way no matter how the results of your lens would be, you > would feel better about it. > > > I'm surprised M9 specifications are so variable. I told Don my M9 sensor > was recently replaced by Leica, so I am confident the accuracy of the > camera is within their specifications. Here are the test shots I sent him: > > https://www.flickr.com/gp/geordiepete/12gtE6 > > It's looking like I'd be best off sending the 90 Summicron to Leica > Germany, and that I might have to send my M9 too, for testing only, saying > that my other lenses are accurate with this camera so it is not to be > altered. > > Peter > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information