Triplet 5 100mm 2.8

[blotafton]

I continue to try out old projector lenses. As you will see it can make fine bubble bokeh. Its biggest weaknesses are the shiny plastic body that adds flare easily. This was improved upon by sawing off as much as possible of the tube. And secondly sharpness is not as great as the benchmark Diaplan 100mm 2.8. But it's sharp enough for artistic stuff and works ok as a Diaplan/Trioplan alternative.
Let's see if anyone knows the factory logo

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[Minolfan]

Certainly not bad!

[wolan]

[sergtum]

it's very intresting