My own testchart
I have made my own testchart to check out if I can see a difference in IQ between the CZ C S-PLANAR 5,6/120 and the CZ MAKRO-PLANAR CFE4/120 .
The S-PLANAR was built in the early 1960s and the CFE-MAKRO PLANAR is the latest version .
The test images were taken with the CFV-39 to check if the resolution of the two lenses is sufficient enough for the CFV-39 sensor with its 6,8 micron pixels .
I checked , both lenses with f5,6 at a distance of 1,5m , because I was especially interested in the IQ at low distances .
When using the PHOCUS lens correction facility I could see a very slight correction for distortion . BTW the same amount for both lenses .
The images from both lenses appear to be of the same IQ in the middle and at the outer areas . I can not really see a difference , not even at 200% in PSCS4 . For USM I used the default from PHOCUS .
Here is my testchart , size is A2 and i glued 5 of them together on a board .
View attachment 1936
Here is my conclusion . When you need or want a PLANAR 120 mm lens , and you do not need the faster lens (F4 instead of F5,6) and you want to save a lot of money , you can also go for a S-PLANAR in good condition .
It is of no use to show a jpg result image here , but for those of you , who would like to see the result , I can send you the fff file and you can use PHOCUS to find out yourself .
I have made the same test for the following lenses :
CFE4/40 IF , CFE4/50 , CF3,5/60 , CF2,8/80 , CF 3,5/100 , and the 120mm lenses .
Jürgen