Cosina Cosinon-T 135mm F/2.8 MC Petri, Bauer Neovaron, Vivitar

Specifications01

MountPENTAX K

Focal length135mm

Max aperturef/2.8

TypeCinema · Telephoto · Prime

Release year1981

Weight330 g

Filter size52 mm

Min focus distance1.35 m

Aperture blades6

Optical elements4

Groups4

AutofocusNo

StabilizationNo

Aperture controlAperture ring (Manual settings only)

Lens hoodBuilt-in telescopic round

EraFilm era

Production statusDiscontinued

Additional Info02

Lens TypeMedium telephoto prime lens

Summary02

135mm f/2.8 manual-focus prime lens for the Pentax K mount, suitable for portrait and low-light use. It’s a fixed-focal telephoto design intended for general photography.

AI-assisted summary — verify against linked sources

Specifications from thelensdb

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.

No plain adapter reaches infinity focus on: Nikon F.

Sources03

thelensdb.comVisit ↗

Other Mounts03

No alternate mounts are indexed for this family yet.