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Latest Review Posted SMC Pentax-DA* 50-135mm F2.8 ED [IF] SDM
The Pentax DA* 50-135 was one of the first lenses that I bought in late-2011 after getting my new K-7, and it has been one of my most-used lenses. As a lens that I rarely leave at home, it easily receives c.a.m’s 4.5-star Gold rating of Highly Recommended! The optical qualities are excellent. The lens is sharp across the field, with very good performance even in the corners at most settings. While the lens is usable wide open across the focal length range, I’ve noticed a slight softness at f/2.8 compared to other commonly-used apertures, especially at the longer end. However, I’ve never had a concern about distortion, vignetting, or aberrations, and the colours, contrast, and overall rendering are superb. In particular, the bokeh is typically pleasing at wide apertures. At a mass of just under 700 grams, I find this lens to be comfortable to carry and handle. It is significantly smaller and lighter than my Sigma 70-200 f/2.8 HSM – which illustrates a strong benefit of the APS-C format. It’s a versatile lens that pairs nicely with my DA 20-40mm Limited. The lens has proven itself in a variety of shooting environments, including trail hikes, cityscapes, concerts, and portraits. Autofocus My copy was afflicted by autofocus issues four times during 2012-2013, during the height of many user reports of ‘SDM failure’. Warranty work included two new motors, cleaning, adjustments, calibration, and “gearing and clutch cam ring” repair. On the fifth instance, the AF seized again and ...



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