Mir 20M 20mm f/3.5
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| Weight: | 390 g |
| Brand: | Zenith |
| Description: | Bayonet mount: M42x1 thread, lens type: wide angle, focal length: fixed, prime lens focal length: 20 mm, aperture F at min. focal length: 3.50 |
| Type: | Lens |
| Length: | 68 mm |
| Diameter: | 92 mm |
| Focal length: | Permanent |
| Lens type: | Wide angle |
| Max viewing angle: | 96 degrees min |
| Minimum focus distance: | 0.18 m |
| Focal length of prime lens: | 20 mm |
| Bayonet: | Thread M42x1 |
| Aperture F at min. focal length: | 3.5 |
| Minimum aperture F: | 16 |
| Number of element groups: | 8 |
| Number of elements: | 9 |