Echo Anastigmat 1:3.5 F=50mm on a Canon EOS 1200D

The Echo Anastigmat 1:3.5 F=50mm (No. 5836) is an obscure lens. Google searches yield very little information but from what I found, I gather this might be an enlarger lens. On the other hand, the lens has its own aperture settings (3.5, 4, 5.6, 8, 11, 16 & 22).

I bought this lens for a few euros at a thrift shop and attached it to an EOS body to see what would happen. The results are interesting.

The last picture shows the lens needs more cleaning than I thought.

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Meaning of Anastigmat (Wikipedia):
An anastigmat or anastigmatic lens is a photographic lens completely corrected for spherical aberration, coma, and astigmatism. Early lenses often included the word Anastigmat in their name to advertise this new feature (Doppel-Anastigmat, Voigtländer Anastigmat Skopar, etc.). All modern photographic lenses are close to being anastigmatic.