Pentax's fast DX telephoto — the DA 200mm f/2.8 with SDM motor for K-mount.
The Pentax SMC DA 200mm f/2.8 ED IF SDM is a super-telephoto prime for Pentax K-mount APS-C cameras, providing a 300mm full-frame equivalent reach at f/2.8. ED glass provides chromatic aberration control, IF maintains constant barrel length, and SDM provides fast autofocus. This lens is closely related to the DA* variant.
The lens delivers 200mm (300mm APS-C equivalent) at f/2.8 maximum aperture with ED glass, internal focusing, SDM autofocus, and a DA APS-C image circle. Weather-resistant construction is included. Pentax in-body SR applies.
The 300mm equivalent at f/2.8 makes this a highly capable sports and wildlife prime for APS-C Pentax shooters. The SDM motor provides tracking-capable autofocus speed. Compare against the DA* 200mm f/2.8 (id=4672) — the two are closely related and may share the same optical formula.
Test SDM autofocus tracking speed at maximum aperture. Verify ED glass condition. Check IF mechanism. Compare against DA* 200mm f/2.8 (id=4672) for specification differences.