The Schneider-Kreuznach 28mm Digitar f/2.8 is a 28 mm prime lens with a maximum aperture of f/2.8 for the Mamiya 645 mount. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.
Focal length
28 mm
Max aperture
f/2.8
Mount
Mamiya 645
Designed for
Full frame
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Full frame | 75.4° | 28 mm |
| APS-C (1.5×) | 53.6° | 43 mm |
| Canon APS-C (1.6×) | 51.6° | 45 mm |
| Micro Four Thirds | 42.2° | 56 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 28 mm | 9.4 m | 4.7 m | 3.3 m | 2.4 m | 1.7 m |
Circle of confusion 0.030 mm (sensor size the lens is designed for).
Longest exposure for sharp stars
| Camera | NPF rule (wide open) | 500 rule |
|---|---|---|
| Full frame (24 MP) | 9.8 s @ f/2.8 | 17.9 s |
| Full frame (45 MP) | 8.2 s @ f/2.8 | 17.9 s |
| APS-C (24 MP) | 7.7 s @ f/2.8 | 11.7 s |
Cameras that fit (5)
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Schneider-Kreuznach 28mm Digitar f/2.8 equivalent to on APS-C?
About 42 mm (1.5×) or 45 mm on Canon APS-C (1.6×).
Which cameras is the Schneider-Kreuznach 28mm Digitar f/2.8 compatible with?
It fits Mamiya 645, Mamiya ZD, Phase One IQ180, Phase One IQ140, Phase One P 25 (see the full list above).