Archived posting to the Leica Users Group, 2012/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jim, perfect song for the PBS Special. On Mon, Jan 16, 2012 at 6:44 PM, Jim Shulman <jshulman at judgecrater.com>wrote: > http://www.youtube.com/watch?v=RwUQwVs87eM > > > -----Original Message----- > From: lug-bounces+jshulman=judgecrater.com at leica-users.org > [mailto:lug-bounces+jshulman=judgecrater.com at leica-users.org] On Behalf > Of > Chris Saganich > Sent: Monday, January 16, 2012 6:25 PM > To: Leica Users Group > Subject: [Leica] Summicron DR Eyes > > I noticed that according to Steve Gandy's lens guide the eyes of my DR > shouldn't be compatible with the lens body. The newer DR lenses have a > dual scale in feet and meters, focus to 20in, and have ridges in the > trough > of the focus ring knurling. The older DR bodies have a single scale, > focus > to 19in, have reproduction ratios, and have ridges on the peaks of the > focus ring knurling. The older bodies are supposed to have a larger ball > bearing compared to the newer DR bodies making the newer eyes incompatible > to the older DR bodies, but the older eyes will work on the newer DR > bodies. Older eyes have the "condenser" logo and newer eyes have the > Leitz > Wetzlar logo. According to convention ( which I haven't confirmed) the > newer eyes shouldn't be compatable on the older DR bodies due to the ball > bearing size difference. My DR has the new logo and the older body so I > was curious if I could find any other examples of this anomaly. I > searched > ebay and the internet for examples where the age of the lens and logo of > eyes were identifiable. Here is what I found: > > 1956- 125,594 lenses made > 1402xxx Old Body Old Logo > 1403731 Old Body Old Logo > 1440268 Old Body New Logo > > 1957- 89,389 lenses made > 1487412 Old Body New Logo > 1513415 Old Body New Logo > 15301xx Old Body New Logo > 1534320 Old Body New Logo > 1545576 Old Body New Logo > > 1958 -97,281 lenses made > 1587819 Old Body Old Logo -From Cameraquest website > 1592570 Old Body New Logo - My Lens > 1623068 New Body New Logo > > > The only exception is from Cameraquest where Steve probably used an old > example of the eyes for the old body. Who but Steve would have lots of > these hanging around? > > All this suggests that eyes with the newer logo were manufactured with the > larger ball bearing receptor for the older DR bodies. > > The ball bearing size on my older DR body is 3 mm diameter and 1.8mm > height. The receptor dimensions on my eyes with newer logo are 3.5 mm > diameter and 1 mm deep. > > It would be interesting if we could fill in these blanks regarding ball > bearing measurements on the older and newer DR bodies and eyes: > > 1) Older DR body: 3mm dia x 1.8mm height > 2) Eyes with older Logo: ??? > 3) Eyes with new Logo on older body: 3.5mm dia x 1mm depth > 4) Newer DR body: ??? > 5) Eyes with new Logo on New DR body: ??? > > The supposition is that the dimensions of1, 2 and 3 should be similar > while 4 and 5 should be different and smaller. > > -- > Chris Saganich > www.imagebrooklyn.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Chris Saganich www.imagebrooklyn.com