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Samyang 8mm f/3.5 Fish-Eye CS

8 mm · f/3.5 · Pentax KAF, Canon EF

The Samyang 8mm f/3.5 Fish-Eye CS is a 8 mm prime lens with a maximum aperture of f/3.5 for the Pentax KAF, Canon EF, Nikon F AI mounts (stereographic projection). Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.

Focal length
8 mm
Max aperture
f/3.5
Mount
Pentax KAF
Designed for
1.53× crop

Field of view by sensor

SensorDiagonal angle of view35 mm equivalent
APS-C (1.5×)121.0°12 mm
Canon APS-C (1.6×)118.8°13 mm
Micro Four Thirds107.0°16 mm

Hyperfocal distance

Focal lengthf/5.6f/8f/11f/16
8 mm0.6 m0.4 m0.3 m0.2 m

Circle of confusion 0.020 mm (sensor size the lens is designed for).

Longest exposure for sharp stars

CameraNPF rule (wide open)500 rule
APS-C (24 MP)29.9 s @ f/3.540.8 s

Cameras that fit (506)

Where to buy

B&H PhotoAmazonKEH (used)MPB (used)

FAQ

What is the Samyang 8mm f/3.5 Fish-Eye CS equivalent to on APS-C?
It is designed for a 1.53× sensor, giving a full-frame equivalent of 12 mm.
Which cameras is the Samyang 8mm f/3.5 Fish-Eye CS compatible with?
It fits Canon EOS 5DS, Canon EOS 5DS R, Canon EOS 6D, Canon EOS 6D Mark II, Canon EOS 5D Mark IV and more (see the full list above).