Premium Pentax Limited pancake at 21mm, machined aluminium wide-angle for ultra-compact street photography.
The Pentax DA 21mm f/3.2 AL Limited is an APS-C pancake prime for the Pentax K mount from Pentax's premium Limited series. DA = digital APS-C format. 21mm on APS-C = approximately 32mm equivalent. AL = aspherical lens element. Pentax K mount.
f/3.2 maximum aperture. 21mm focal length (APS-C; ~32mm full-frame equivalent). AL (aspherical). SMC (Super Multi Coating). AF (body-drive screw). At approximately 85g. Pancake design. Pentax K mount.
The DA 21mm Limited is an unusual wide prime — the f/3.2 aperture is chosen to optimise the compact optical design at pancake size. The Limited series features an aluminum barrel and a focus clutch (slide forward for MF, back for AF engagement). Very compact at ~22mm long.
On the used market the Pentax DA 21mm f/3.2 AL Limited is a sought-after compact wide prime. Condition checks: focus clutch mechanism, front element, aperture. Pentax K mount — APS-C format.