Samyang 135mm F/2 ED UMC / Rokinon 135mm F/2 ED UMC

Specifications01

MountPENTAX K

Focal length135mm

Max aperturef/2

TypePortrait · Telephoto · Prime

Weight830 g

Physical length122 mm

Min focus distance0.8 m

Min aperturef/22

Additional Info02

Lens TypePrime lens

Summary02

135mm prime lens with a maximum aperture of f/2.0 for Pentax K-mount. Intended for portrait and low-light use due to the bright aperture and moderate telephoto reach.

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Specifications from dpreview

Where can this lens be adapted?

The Pentax K mount has a flange distance of 45.46 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Pentax DA and FA J lenses have no aperture ring. Use an adapter with its own aperture control.
Pentax DA lenses are made for APS-C.

Sony EAdapter · 27.46 mm
Canon RFAdapter · 25.46 mm
Nikon ZAdapter · 29.46 mm
Fujifilm XAdapter · 27.76 mm
L-MountAdapter · 25.46 mm
Micro Four ThirdsAdapter · 26.21 mm
Fujifilm G (GFX)Adapter · 18.76 mm
Canon EF-MAdapter · 27.46 mm
Canon EFAdapter · 1.46 mm
A rear element that sticks out can hit the camera mirror.