Specification
| Mount | M42x1 |
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| Diaphragm action | Preset/semi automatic/fully automatic |
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| Focal length, mm | 50 |
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| Maximum aperture | f/2.8 |
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| Angle of View | 45° |
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| Minimum focusing distance | 35 cm |
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| Filter size | 49 mm |
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| Construction | 4 elements in 3 groups |
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| Dimensions, (Diameter x Length) | 51x45 mm |
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| Weight, kg | 0.175 |
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Tessar 2.8/50