Leica Tri-Elmar-M 16-18-21mm f/4 Aspherical
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| Weight: | 335 g |
| Brand: | Leica Camera |
| Description: | Mount: Leica M, lens type: wide-angle, focal length: variable, min. focal length: 16mm, max. focal length: 21 mm, aperture F at min. focal length: 4, aperture F at max. focal races |
| Type: | Lens |
| Functions: | Internal focus |
| Length: | 62 mm |
| Diameter: | 54 mm |
| Max. focal length: | 21 mm |
| Min. focal length: | 16 mm |
| Focal length: | Variable |
| Lens type: | Wide angle |
| Zoom ratio: | 1.3x |
| Minimum focus distance: | 0.5 m |
| Bayonet: | Leica M |
| Aperture F at max. focal length: | 4 |
| Aperture F at min. focal length: | 4 |
| Minimum aperture F: | 22 |
| Number of aspherical elements: | 2 |
| Number of element groups: | 7 |
| Number of elements: | 10 |