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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
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
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.
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.
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.
The lens was in perfect shape. I waited a long time to get this lens at a good price.
Amazing sharpness. Feels solid and well built. Snappy autofocus.
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
Shipping just a bit slow. Lens as described. Happy with the lens and learning how to use it effectively.
Slow focus time. Sometimes it takes more than 10 seconds to focus
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.
I have taken pictures that I normally would have had to have used a tripod.
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.