Cosina has made a lot of things for other companies in the Japanese photo market. As with any contract manufacturer, they build to the price and quality point that the customer specifies.
However, the Voigtlander branded stuff was their own venture, the few lenses I have are excellent quality both mechanically and optically. They are far ahead of anything made in the 50's, as a number have ashperical lenses and excellent coatings. They are modern lenses in every regard.
I have the 50/1.5 Nokton and it's a great performer on my IIIc, but a bit large. If I was buying a 50 today I would probably get the F2.5 Color Skopar, or for less money the 40mm F1.4
Scroll a bit more than halfway down to see all of the 50mm lenses they made. This list is both thread and M mounts. https://www.cameraquest.com/voigtlen.htm
However, the Voigtlander branded stuff was their own venture, the few lenses I have are excellent quality both mechanically and optically. They are far ahead of anything made in the 50's, as a number have ashperical lenses and excellent coatings. They are modern lenses in every regard.
I have the 50/1.5 Nokton and it's a great performer on my IIIc, but a bit large. If I was buying a 50 today I would probably get the F2.5 Color Skopar, or for less money the 40mm F1.4
Scroll a bit more than halfway down to see all of the 50mm lenses they made. This list is both thread and M mounts. https://www.cameraquest.com/voigtlen.htm
