Introduction While other firms continue to update existing full-frame lenses for use with their APS-C format cameras, Pentax has concentrated on dedicated lenses for their crop-cameras. The result is one of the widest range of lenses of this type available. The line up consists of several series but the DA Limited models are highly regarded for their mechanical construction, high-grade optics and small size.The new HD DA 20-40mm f2.8-4 ED is the first zoom in the range from the new owner of the Pentax brand – Ricoh. It’s the equivalent to a 31 to 62mm and
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