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Testing three Industar-61 lenses
with the One Dollar Resolution Chart
(small lens edition)


 
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The One Dollar Resolution Chart


Some time ago I found that the Industar-61 was not any worse than the Summicron-C, even though it is 20 times cheaper ($20 vs $400). So I bought another couple of Industar-61 lenses for a couple of friends, and I got curious: will they be just as good as my original one? Cue the one dollar resolution chart.

In this test you can see three copies of the Industar 61 for the M39 screw mount (52mm f/2.8, I believe these copies are from around 1969), one of the Leitz Summicron-C 40mm f/2.0 for the Leica M mount (my copy is from 1973), and one of the Leitz Summilux-R 50mm f/1.4 (from 1976).

The subjects here are three Industar 61 lenses sofr the M39 screw mount (52mm f/2.8). I believe these copies are from around 1969. I tested them on the NEX-5N (16 mpix APS-C sensor), always in stills mode, with shutter delay and all the usual precautions. I got three M39-to-NEX adapters, so I put one on each lens (I chose which pairings to make by trying to get infinity focus on all lenses; you'll see this was a problem, so I was trying to sort it out this way; still bad, but better than it was at the start). I didn't check them on full frame because these new copies are going to live on APS-C cameras.

Conclusion: as I already knew, vintage glass is a lottery.





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CENTER - 100% crops
 
 
f/2.8
f/3.5
f/4.5
f/5.6
f/8.0
copy 1
copy 2
copy 3





CORNER (focusing at corner) - 100% crops
 
 
f/2.8
f/3.5
f/4.5
f/5.6
f/8.0
copy 1
copy 2
copy 3





CORNER (focusing at center) - 100% crops
 
 
f/2.8
f/3.5
f/4.5
f/5.6
f/8.0
copy 1
copy 2
copy 3





BOKEH
 
 
f/2.8
f/4.0
f/5.6
copy 1
copy 2
copy 3





INFINITY FOCUS
 
 
f/2.8
copy 1
copy 2
copy 3


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