The Beroflex 400mm f/6.3 is a 400 mm prime lens with a maximum aperture of f/6.3 for the M42 mount. Here are its field of view on different sensors, hyperfocal distances and the cameras it fits.
Focal length
400 mm
Max aperture
f/6.3
Mount
M42
Designed for
Full frame
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Full frame | 6.2° | 400 mm |
| APS-C (1.5×) | 4.0° | 612 mm |
| Canon APS-C (1.6×) | 3.9° | 640 mm |
| Micro Four Thirds | 3.1° | 800 mm |
Hyperfocal distance
| Focal length | f/8 | f/11 | f/16 |
|---|---|---|---|
| 400 mm | 667 m | 485 m | 334 m |
Circle of confusion 0.030 mm (sensor size the lens is designed for).
Cameras that fit (2)
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Beroflex 400mm f/6.3 equivalent to on APS-C?
About 600 mm (1.5×) or 640 mm on Canon APS-C (1.6×).
Which cameras is the Beroflex 400mm f/6.3 compatible with?
It fits KMZ Zenit 122, KMZ Zenit 412LS (see the full list above).