Digital SLR Blog

SLR-Gear reviews the Pentax 15mm f/4 ED AL Limited SMC DA lens and after analyzing it recommend it. The lens produced extremely sharp images and chromatic aberration was negligible. However according to the reviewer, the wide-angle lens produced soft images at times and the macro performance was disappointing

The smc PENTAX-DA15mm F4 ED AL Limited is a new ultra-wide angle lens for Pentax digital SLR cameras. The lens offers the equivalent to a 23mm angle of view in the 35mm format, making it ideal for architecture and landscape photography.

Specifications
Focal Length 15mm
(Equivalent to 23mm in 35mm format)
Aperture F4
Minimum Aperture F22
Lens Construction 8 elements in 6 groups
Angle of View 86° (with PENTAX D-SLR camera body)
Minimum Focusing Distance 0.18m (0.59 ft.)
Maximum Magnification 0.15X
Filter Diameter 49mm
Diaphragm Control Fully Automatic
Number of Diaphragm Blades 7
Lens aperture ring None
Tripod adapter None
Lens Hood Built-in Flower-Shaped Lens Hood
Lens Cap Screw-in Lens Cap
Lens Case Lens Case DA-70
Maximum Diameter & Minimum Length 63mm x 39.5mm (2.5 inch x 1.58 inch)
Weight 212g / 7.47 oz.
Remarks * Quick-Shift Focus System