It started out as a Tessar comparison video, but it turned out to be a little more interesting, my Zebra Tessar was sharper than two other black Tessars, and the Zebra Tessar went on to be almost as sharp as a Flektogon, but there was an unusual twist comparing it against the Helios 44-2. The soft looking Helios was sharper, very sharp.
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After this video
I decided to clean and service one of my Black Tessar's to see if it would make a difference to its sharpness, I videoed all of this showing the whole process, and then I took shots to see if the Zebra Tessar was still sharper, but that's all in my follow-up video called:
"Carl Zeiss Black Tessar Repair : glass clean & aperture blade clean"
Here is the link
• Carl Zeiss Black Tessa...