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K-mount Lenses

Discontinued : Telephoto Lenses

smc PENTAX-DA50-135mmF2.8ED[IF] SDM

  • APS-C
  • Zoom
  • DA★

Telephoto zoom lens with rich gradations and outstanding three-dimensional feel

This lens enables imaging where the target subject stands out from a background with smooth gradations.
Outstanding imaging performance with colors that remain sharp even in the details Star lens series for the digital age combining a large F2.8 aperture and compact ease-of-operation

Built-in ultrasonic motor (SDM mechanism)
This lens features a compact ultrasonic motor for enabling an internal AF mechanism (SDM mechanism). It also includes a brake function to enable easy speed and position control for smooth and precise AF operation.
When the lens is attached to an SDM-compatible digital SLR camera, operation automatically switches to the AF by the SDM mechanism. When the lens is attached to a non-SDM-compatible digital SLR camera, AF operation can be performed by the motor in the camera body.

Digital SLRs only SDM Body AF Dust and Weather resistant Quick-Shift Focus SP Coating Extra-low Dispersion (ED) Glass Inner Focus (IF)

Hood : PH-RBK67 / Soft-Case : S90-160 Included
JAN-Code / 4961333 129270


Sample Images

  • Aperture F9.0, Shutter speed 1/1000sec, Focal length 135mm

  • Photo by Etsuko Enami

    Aperture F6.3, Shutter speed 1/160sec, Focal length 90mm

  • Aperture F8.0, Shutter speed 1/250sec, Focal length 50mm

  • Photo by GION

    Aperture F8.0, Shutter speed 1/15sec, Focal length 58mm

  • Aperture F8.0, Shutter speed 1/320sec, Focal length 135mm

  • Aperture F8.0, Shutter speed 1/100sec, Focal length 85.0mm, White balance Auto, ISO sensitivity 100, Finishing touch Flat

  • Aperture F5.6, Shutter speed 1/125sec, Focal length 135.0mm, White balance Daylight, ISO sensitivity 800, Finishing touch Portrait
    *Publication Size : 1330×2000pixel

Click here to see works by users

Features / Specifications

Focal length equivalent to 76.5mm to 207mm in 35mm format film
This telephoto zoom lens has a zoom ratio of approximately 2.7X and enables shooting of landscapes, portraits and also sports and other high-mobility shooting.
Large F2.8 aperture
This lens has a brightness of F2.8 over the entire zoom range for enabling a wide range of out-of-focus (bokeh) effect and capturing just the right moment with the high-speed shutter. The lens also features compact mobility for easy shooting.
ED (extra-low dispersion)
Three ED (extra-low dispersion) glass lenses are used for eliminating any chromatic aberration. This enables taking of stunning images at high resolutions, beautiful color gradations with sharp colors, and more lifelike imaging.
IF (inner focus) system
The lens length does not change during focusing for easy handling without becoming unbalanced.
Dust-resistant and drip-proof construction
The various lens components have been sealed for enabling a dust-resistant and drip-proof construction that was not possible in conventional lenses. This prevents the entry of water and dust into the lens. When combined with the dust-resistant and weather-resistant body of the K10D, this enables superior weather-resistant performance.
Quick-Shift Focus System
If you turn the focus ring after focusing by the AF, focusing instantly switches to the manual focus. This enables smooth focusing operations without the need for a switching operation.
SP (super protect) coating
A special coating is used on the front lens for repelling water and oils. This enables any water and oils on the lens to be easily removed for effective protection of the lens surface.
Ghostless coating
The lens uses a special coating that eliminates inner reflections of the lens to reduce ghosting. This enables the shooting of clear, high-contrast images even under backlighting and other adverse conditions.
Type Telephoto Zoom
Focal length (Equivalent to 35mm format) 50-135mm(76.5-207mm)
Maximum aperture F2.8
Minimum aperture F22
Angle of View 31.5°-11.9°
Lens construction 18 elements / 14 groups
No. of diaphragm blades 9
Closest focusing distance 1.0m
Maximum reproduction ratio 0.17x
Filter size 67mm
Diameter x length 76.5 x 136 mm
Weight 685g

Compatibe Comberters (Click here for details)


*When mounted, this converter closes down the lens’s maximum aperture by one stop.

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