N°418976 · Family detail
PentaxZoom·PENTAX K mount·2007
Smc Pentax-DA* 50-135mm F/2.8 ED SDM
Specifications01
MountPENTAX K
Focal length50-135mm
Max aperturef/2.8
TypeZoom
Release year2007
Weight685 g
Filter size67 mm
Min focus distance1 m
Max magnification0.1701
Aperture blades9
Optical elements18
Groups14
AutofocusYes
StabilizationNo
Aperture controlNone
The aperture is controlled from the camera
Lens hoodPH-RBK67 - Bayonet-type petal-shaped
With filter access window
TeleconvertersHD Pentax-DA 1.4X AF Rear Converter AW→ 70-189mm F/3.9
EraDigital era
Production statusDiscontinued
Additional Info02
Lens TypeTelephoto zoom lens
Summary02
Pentax K-mount zoom lens with a 50–135mm focal range and constant f/2.8 aperture, intended for general telephoto use such as portraits and events. Features SDM autofocus.
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.

Other Mounts03
No alternate mounts are indexed for this family yet.