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1958 J-9 8.5cm f2 Hybrid, Focal Length reduced
Modified for the Leica standard
mushrooms f4 
 
J-9, closest focus, second iteration.
2m f4a 
 
Second adjustment. Focus good  at 2m
2m f2a 
 
Second adjustment. Focus good  at 2m
1.5mf4a 
 
Second adjustment. Focus good enough at 1.5m
1.5mf2a 
 
 
Second adjustment. Focus good enough at 1.5m
1.15m f4a 
 
Second adjustment. Focus still off at 1.15m, but covered at F4
1.15m f2a 
 
Second adjustment. Focus still off at 1.15m
j9 ltm 5m f2a 
 
5m distance, slight front-focus 
 
I iterated the work, reduced the focal length further, and reduced the shim ~0.15mm. Will re-test...
j9 ltm 2m f2a 
 
2m is perfect. 
 
 
I iterated the work, reduced the focal length further, and reduced the shim ~0.15mm. Will re-test and re-post.
j9 ltm2 115m f2a 
 
1.15m, slight back-focus 
 
 
I iterated the work, reduced the focal length further, and reduced the shim ~0.15mm. Will re-test...
j9 ltm2 115m 3f2a 
 
1.15m, slight back-focus 
 
 
I iterated the work, reduced the focal length further, and reduced the shim ~0.15mm. Will re-test...
j9 ltm2 115m 2f2a 
 
1.15m, slight back-focus 
 
 
I iterated the work, reduced the focal length further, and reduced the shim ~0.15mm. Will re-test...
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