Pentax Zoom Normal-Telephoto SMCP-DA* 50-135mm f/2.8 ED (IF) SDM Autofocus Lens for Digital SLR

Model #21660

USA Version
Pentax 21660 1
Pentax 21660 1
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Expert Reviews
What digital camera.32818507
28 September 2012

What Digital Camera tests the Pentax smc DA 50-135mm f/2.8 ED (IF) SDM lens to find out if it's as good as the price suggests.

  • +

    Weather-resistant, Replicates 70-200mm focal range

  • -

    Zoom ring should be wider, hefty price

14 June 2014

This lens has been around a while now, but it still manages to hold its own well against the very latest lenses available from other manufacturers. It delivers very good sharpness in the centre of the frame at maximum aperture, and excellent sharpness across the frame when stopped down.

  • +

    Excellent sharpness across the frame, when stopped down, Very good sharpness in the centre at maximum aperture, Weather and dust resistant construction, Good build quality, Silent focusing, Full time manual focus override, Constant f/2.8 aperture

  • -

    Performance towards edges of the frame at maximum aperture, Slightly gritty manual focus action on sample used for testing

Photozone de.34752480
26 December 2007

The Pentax SMC DA* 50-135mm f/2.8 ED [IF] SDM is a high quality medium tele zoom lens but just like its Tokina cousin it is not without flaws. The resolution figures are generally very good to excellent except a drop in border quality at wide-open aperture towards the long end of the zoom range.

User Reviews
B h photo.32817553
17 April 2016

This is my second Pentax DA 50-135mm Pentax lens. I purchased it because I loved the first one so well. The first one was destroyed when the retaining clip on my dual camera harness failed and the my K3 with the 50-135mm lens attached took a tumble to the floor.

13 August 2017

Bought this lens in 2008. Loved it. Within a year, the SDM went out. Had to pay for repair. Worked about a year, the damn SDM went out again. Paid to have it repaired. Now it is out again. Definition of insanity, right. Three AF motors and I am finished with Pentax lenses.

3 August 2017

The lens was in perfect shape. I waited a long time to get this lens at a good price.

B h photo.32817553
29 May 2017

Amazing sharpness. Feels solid and well built. Snappy autofocus.

22 May 2017

an amazing tele lens. quite sharp and very quick. the downside is that it is heavy and can wear on you after a day of shooting

11 March 2017

Shipping just a bit slow. Lens as described. Happy with the lens and learning how to use it effectively.

28 September 2016

Slow focus time. Sometimes it takes more than 10 seconds to focus

B h photo.32817553
21 April 2016

The first use of this lens was a early morning balloon launch I was ready to return it and give up on Pentax lens. After rechecking the fine focus(it was ok} I took some zoo pictures with my grand-daughter, and some low light photos indoor and some moonlight photos outside that are excellent.

B h photo.32817553
5 April 2016

I have taken pictures that I normally would have had to have used a tripod.

B h photo.32817553
28 December 2015

This is a relatively fast lens, I believe weather resistant (although I haven't confirmed this myself). Nice for portraits, and a good general purpose lens.

Product Highlights
    Average Expert Score
    Average User Score
    In The Box
    • Pentax smc PENTAX-DA* 50-135mm f/2.8 ED (IF) SDM Lens
    • S90-160 Lens Case (Soft)
    • Front Lens Cap
    • Rear Lens Cap
    • Lens Hood
    • Limited 1-Year Warranty
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