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Forum: Pentax SLR Lens Discussion
07-20-2017, 04:34 PM
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In practical terms, a FF body is heavier and the D-FA 70-200mm f/2.8 is around 4lb. Following fast tele action with such bulk may be as challenging as the AF you are now experiencing. Also, the tele framing advantage goes to APS-C. The DA* 50-135mm f/2.8 provides the same FOV and similar performance in a much more manageable package. The newer APS-C designs are very close to full-frame in low noise at high ISO capability, as is shown with the new KP. Perhaps the best strategy is to wait for the K-3 II replacement, which should also produce the same level of high-ISO performance as the KP, as well as improvement in AF, and also consider converting the SDM of your DA* 50-135mm to screw-drive, which everyone having done this says is faster.
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