This lens has a 31mm focal length, which provides a slightly broader angle of view than more conventional 35mm lenses, to expand the possibilities of wide-angle photography.This lens inherits the proven optics of the smc PENTAX-FA 31mm F1.8AL Limited, and incorporates high-grade optical components — such as glass-molded, aspherical elements and high-refraction, low-dispersion glass elements — to deliver sharp, well-defined images of small subjects, such as the very tips of a bare, leafless tree’s branches in winter.To further improve imaging power, it also features a newly applied HD coating to produce clear, crisp images even under demanding conditions, and a completely round-shaped diaphragm to deliver a natural, beautiful bokeh (defocus) effect from open aperture to F3.5.While retaining the outstanding optical performance of the smc PENTAX-FA 31mm F1.8AL Limited, PENTAX has upgraded the imaging power by paying meticulous attention to the details that can’t simply be measured in numbers alone, and also by applying the SP coating to the front optical element to improve the water/grease-repellent and scratch-resistant performance for easier maintenance.* HD stands for High Definition.*Please apply the latest update of Digital Camera Utility 5 when you handle images taken by this lens on Digital Camera Utility 5. In case the software version is old, the name of this lens cannot be displayed correctly. Digital Utility 4 and below cannot display the name of this lens correctly.
The barrel, hood and cap are all made of high-grade aluminum, meticulously machined for an attractive appearance and beautiful texture. It also features a mount pointer with a shippoyaki (cloisonné) finish, which lets the user effortlessly and quickly mount the lens to a camera body.
* HD stands for High Definition.
Equivalent to 47.5mm in 35mm format
(when attached to PENTAX APS-C size DSLR cameras)
|Lens Construction||9 elements in 7 groups|
|Angle of View (Diagonal)||70°(when attached to PENTAX 35mm full-frame SLR cameras)|
49°(when attached to PENTAX APS-C size DSLR cameras)
|Minimum Focusing Distance||0.3m (0.98ft.)|
|Diaphragm Control||Fully automatic|
|Number of Diaphragm Blades||9|
Rounded diaphragm （31mm:F1.8-F3.5）
|Lens Cap||O-LW65B (included)|
|Lens Case||P70-140 (included)|
|Maximum Diameter x Length||approx. 65mm x 69mm (approx. 2.6in. x 2.7in.)|
|Humidity||85% or less (no condensation)|
|Included Accessories||Lens Cap O-LW65B, Lens Mount Cap K, Lens Case P70-140|
SP (Super Protect) Coating
A1.4X-S A2X-S HD PENTAX-DA AF REAR CONVERTER 1.4x AW*
*When mounted, this converter closes down the lens’s maximum aperture by one stop.