Archived posting to the Leica Users Group, 2014/01/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]My camera and Summilux M 50 ASPH. are just back from Germany after repair from impact and I've shot a little to check the accuracy of the calibration firstly. The physical aspects of the servicings are faultless. That was an expensive fall in Barcelona, by the way. Thank heavens for insurance. I was told that the camera was serviced and calibrated first, then the lens which was checked against the camera adjustments. I'm very pleased to say that the focus adjustment is very very good, both of the RF compared to magnified liveview and the lens at critical DoF settings. I tested at one and two metres from f/1.4 down and I estimate from my tests that the sharpest plane is perhaps within a couple of millimetres. Much closer than probable variation when I'm handholding. I noticed some interesting additional aspects during testing. Overall. focus peaking shows the focus plane shift very clearly as you focus on a patterned target. Operating with a loupe looking at the 10x liveview on the LCD (a very artificial test) I can see that the range of 'in focus' is coarser than with the RF. That is to say, with a clear target pattern, the RF is just plain more accurate by far. I've been told more than once that the RF in the new camera is adjusted to finder tolerances than ever before and with new equipment and also that the technicians are finding that the new camera is sensitive to lens calibration. One other item I noticed is that Lightroom 5 reported exactly the aperture used from f/2 to f/8 with my 75. Typically those aperture estimates might be within 1/2 to 1 stop. A happy coincidence perhaps Cheers Geoff http://www.pbase.com/hoppyman