N°411062 · Family detail
PentaxPortrait·PENTAX K mount·1984
Smc Pentax-A* 135mm F/1.8
Specifications01
MountPENTAX K
Focal length135mm
Max aperturef/1.8
TypePortrait · Telephoto · Prime
Release year1984
Weight865 g
Filter size77 mm
Min focus distance1.2 m
Aperture blades9
Optical elements7
Groups6
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodRH-A77 - Screw-type round
TeleconvertersPentax Rear Converter-A 1.4X-S→ 189mm F/2.5
Pentax Rear Converter-A 2X-S→ 270mm F/3.6
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeMedium telephoto prime lens
Summary02
Pentax K-mount SMC-A* 135mm prime with maximum aperture f/1.8, intended for portrait and low-light use. Produces a medium-telephoto field of view for subject isolation.
AI-assisted summary — verify against linked sourcesWhere 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.
Other Mounts03
No alternate mounts are indexed for this family yet.