ZEISS Distagon T 2.8/25
商品類別：ZEISS 機器視覺工業鏡頭
ZEISS Classic Lenses - Proven optical design in a sturdy metal housing
Focal Length : 25mm
Max. Aperture : 2.8
Min. Free Working Distance : 60mm
Filter Thread : M58 × 0.75
Camera Mount : F-Mount , M42
Features
● f/2.8 aperture
● Precise manual focusing
● Robust full-metal construction
● Fixation for focus and aperture
● Identical color reproduction of all models
● For industrial cameras with F-Mount up to sensor sizes of 24×36 mm or 43mm line sensors
● Very short free working distance (60 mm)
Optical data
| Focal length | 25mm |
| Aperture range | f/2.8 – f/22 (1/ 2 stop intervals) |
| Number of elements / groups | 10 / 8 |
| Min. working distance (object to sensor) | 170mm (0.56 ft.) – ∞ |
| Min. free working distance | 60mm (0.20 ft.) – ∞ |
| Angular field* (diag. / horiz. / vert.) | 80 / 70 / 50° |
| Max. diameter of image field | 43mm (1.7") |
| Flange focal length | F-Mount : 46.5mm (1.8") ; M42-Mount : 45.5mm |
| Coverage at close range | 55 × 83mm (2.17 × 3.27") ; line 98mm (3.8”) |
| Image ratio at close range | 1:2.3 |
| Filter-thread | M58 × 0.75 |
| Weight | 460g (0.92 lbs) |
| Camera mount | F bayonet , M42 |
* referring to 35mm format
Relative Illuminance*
Relative Distortion*
* Data for infinite focus setting
MTF Charts*
* Data for infinite focus setting / Not for IR version