ZEISS Interlock Compact 2.8/21
商品類別：ZEISS 機器視覺工業鏡頭
ZEISS Interlock Compact Lenses - Compact lenses for large image circles
Focal Length : 21mm
Max. Aperture : 2.8
Min. Free Working Distance : 160mm
Filter Thread : M52 × 0.75
Camera Mount : M42 Mount /18.0mm FFD
Features
● Very compact but suitable to large image format
● For industrial cameras up to sensor sizes of 24×36 mm or 41mm line sensors
● Precise manual focusing
● Robust full-metal construction
● Features special screws to fix focus and aperture settings even in rough situations
● Due to light weight resistant against vibrations and shocks
● Large angular field of 91°
Optical data
| Focal length | 21mm |
| Aperture range | f/2.8 – f/22 |
| Number of elements / groups | 11 / 9 |
| Min. working distance (object to sensor) | 250mm (0.82 ft.) – ∞ |
| Min. free working distance | 160mm (0.52 ft.) – ∞ |
| Angular field* (diag. / horiz. / vert.) | 91 / 81 / 59° |
| Max. diameter of image field | 43.3mm (1.7") |
| Flange focal length | 18.0mm |
| Coverage at close range | 281 × 187mm (11.0 × 7.3") ; line 319mm (12.5”) |
| Image ratio at close range | 1:7.81 |
| Filter-thread | M52 × 0.75 |
| Weight | 448g (1.0 lbs.) |
| Camera mount | M42 (18.0mm FFD) |
* referring to 24 × 36 mm format resp. 43mm line
Relative Illuminance*
Relative Distortion*
MTF Charts*
* Data for infinite focus setting
Spectral Transmission
