| Description | Industrial lens by Carl Zeiss |
| Articlenumber (Eureca): | 06.11.0091 |
| Origin: | Germany |
| Manufacturer: | Carl Zeiss |
| Designation | Interlock Compact 2.8/21-M42 |
| Manufacturer ID | 2192-043 |
| Focal length | 21 mm |
| Mount | M42 |
| Aperture range | 2.8–22 |
| Format | 43 mm |
| Format | 1.7 ″ |
| Lens elements / Groups | 11 / 9 |
| Min. free working distance (object to sensor) [mm] | 250–∞ mm |
| Min. free working distance (object to sensor) [ft] | 0.82–∞ ft |
| Min. free working distance [mm] | 160–∞ mm |
| Min. free working distance [ft] | 0.52–∞ ft |
| Angular Field diag. / hor. / vert. | 91 / 81 / 59 ° (24 × 36 mm² Format) |
| Diameter of image field [mm] | 43.3 mm |
| Diameter of image field [inch] | 1.7 ″ |
| Flange focal distance [mm] | 18.0 mm |
| Coverage at close range [mm] | 281 × 187 mm × mm |
| Coverage at close range [inch] | 11.0 × 7.3 ″ |
| Image ratio at MOD | 1:7.81 |
| Filter thread | M52 × 0.75 |
| Weight | 448 g |
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Last update: 07.05.2022
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