Another of my triplet lenses.
The Carl Zeiss Jena Triotar 1:4 f=8,5 cm (85mm, f/4).
This is the uncoated (non-T) version with an M40x1 mount. According to one source, this lens was manufactured in 1945.
The lens has 3 optical elements in 3 groups (yes, triplet). Though it is a long-focus lens, it is not a telephoto lens. That's why the body is so long for an 85mm lens, resembling earlier 135mm lenses.
It has 16 aperture blades. The aperture ring is clickless (f/4-f/32).
The filter thread is 40.5mm.
The Triotar 85mm is surprisingly sharp for such an old triplet lens.
See also related notes:
- Carl Zeiss Jena Triotar 80/4: Samples [1] - FF - f/4 (2025-08-19)
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