See this thread:
Wartime Sonnar 1:4 f=13.5cm
"Wow'd" by the rare Wartime Sonnar, and STUNNED by the prototype pre-war uncoated Sonnar- as in Few made and TWO made, I had to do something!
I've shot with my perfect-glass 1937 CZJ 13.5cm F4 Sonnar using a Contax to Leica Adapter, but the focus was just not "good Enough". I've custom indexed a Cam for an adapter to use my 8.5cm F2 Sonnar, and focus is good across range- but it is dedicated to that one lens.
I bought a Jupiter-11 to investigate using the J-11 Focus mount for the pre-war, uncoated Sonnar. These are all test shots, short answer: focus is good from 2.5m closest focus to infinity. The tolerances on the J-11 mount are so close to the Zeiss optics that the F-Stop index comes up to "almost" where the original J-11 index was. I've done a lot of conversions of 5cm Sonnars, only a few come this close- typcially I have to re-index the aperture ring.
Converted Sonnar by fiftyonepointsix, on Flickr
Miserable, wet day today- heavy overcast, so these are quick focus tests to make sure the shim is set correctly. Tomorrow should be sunny.
2.5m, wide-open
Sonnar 13.5cm F4, Wide-Open by fiftyonepointsix, on Flickr
Infinity, wide-open.
Sonnar 13.5cm F4, Wide-Open by fiftyonepointsix, on Flickr
Wet Flowers, wide-open.
Sonnar 13.5cm F4, Wide-Open by fiftyonepointsix, on Flickr
Downed Tree- wide-open
Sonnar 13.5cm F4, Wide-Open by fiftyonepointsix, on Flickr
I did shoot with the J-11, it is quite good. Now it is in Contax mount, with the original shims and index mark in place. This is easily convertible back and forth. The Sonnar is sharper, despite being uncoated. After 80 years, bloom acts like a lens coating- it certainly does on this lens.
Converted Sonnar by fiftyonepointsix, on Flickr
Wartime Sonnar 1:4 f=13.5cm
"Wow'd" by the rare Wartime Sonnar, and STUNNED by the prototype pre-war uncoated Sonnar- as in Few made and TWO made, I had to do something!
I've shot with my perfect-glass 1937 CZJ 13.5cm F4 Sonnar using a Contax to Leica Adapter, but the focus was just not "good Enough". I've custom indexed a Cam for an adapter to use my 8.5cm F2 Sonnar, and focus is good across range- but it is dedicated to that one lens.
I bought a Jupiter-11 to investigate using the J-11 Focus mount for the pre-war, uncoated Sonnar. These are all test shots, short answer: focus is good from 2.5m closest focus to infinity. The tolerances on the J-11 mount are so close to the Zeiss optics that the F-Stop index comes up to "almost" where the original J-11 index was. I've done a lot of conversions of 5cm Sonnars, only a few come this close- typcially I have to re-index the aperture ring.
Miserable, wet day today- heavy overcast, so these are quick focus tests to make sure the shim is set correctly. Tomorrow should be sunny.
2.5m, wide-open
Infinity, wide-open.
Wet Flowers, wide-open.
Downed Tree- wide-open
I did shoot with the J-11, it is quite good. Now it is in Contax mount, with the original shims and index mark in place. This is easily convertible back and forth. The Sonnar is sharper, despite being uncoated. After 80 years, bloom acts like a lens coating- it certainly does on this lens.
Last edited by a moderator: