smc Pentax DA 40mm f/2.8 XS

This unifocal standard lens offers a focal length equivalent to 61mm in the 35mm format, and measures a mere 9.2 mm in length, making it the world’s thinnest interchangeable lens. Thanks to its super-thin design, it is highly portable and easy to store and carry. Its optics were designed based on those of the acclaimed smc PENTAX-DA 40mm F2.8 Limited lens. Its maximum aperture of F2.8 produces sharp, bright images in a wide range of photographic situations, including snapshots, scenic photos, portraits, and even low light indoor shooting.



SP coating to block dirt and dust

The front surface of this lens is treated with an SP (Super Protect) coating, which applies an exclusive fluorine compound to the lens surface through a vapour deposition process. This SP coating not only repels dust, water and grease, but also makes it easy to wipe off oily stains such as fingerprints and cosmetics.

Technical data
Format compatibility	Pentax crop frame DSLRs
Lens mount	Pentax KAF
Zoom / fix	Prime lens
Lens type	Normal
Focal length	40 mm
Focal length (35mm camera equivalent)	61 mm
Maximum aperture	f/2.8
Minimum aperture	f/22
Optical construction	5 elements in 4 groups
Focusing	Autofocus / Manual focus
AF motor	Screw drive
Full mechanical manual focus override	No
Image stabiliser	None
Minimum focus distance	40 cm
No. of diaphragm blades	9
Maximum reproduction ratio	0.17×
General
Diameter	62.9 mm
Length	9.2 mm
Weight	52 g
Filter thread	27 mm
Package contents	Front lens cap / Rear lens cap / Lens