The Carl Zeiss Jena Tessar 1:4,5 f=4cm (40mm f/4.5) with M42x1/45.5 mount.
Despite its focal length being shorter than 43 mm, it was designed as a non-retrofocus lens for SLR cameras. Because of this, it has a rather protruding back.
According to the serial number, the lens was manufactured in 1949.
The Tessar 50/3.5 (on the left) and the Tessar 40/4.5 (on the right):
See also related notes:
- My lenses by mount (2026-07) (2026-07-07)
- Meyer-Optik Helioplan and Carl Zeiss Jena Tessar: 40/4.5 both (2025-12-03)
- Carl Zeiss Jena Tessar 40/4.5: Samples [1] - FF - f/4.5 (2025-07-09)
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