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First announced last October, Ricoh is ready to ship the HD Pentax-D FA* 50mm F1.4 SDM AW, a weather-sealed fast prime for the company's full-frame DSLRs. The lens has 15 elements in 9 groups: one anomalous dispersion and three aspherical. A newly developed SDM ring-type motor has 7.5x as much torque as previous models in order to move all of that glass quickly and smoothly. As the lens uses an electromagnetic diaphragm, it is fully compatible with only the K-1 Mark II, K-1, K-3 II, K-3, KP, K-7...
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