Pentax HD-D FA 15-30mmF2.8ED SDM WR

The Ricoh HD Pentax-D FA 15-30mm F2.8ED SDM WR is a professional-grade ultra-wide-angle zoom lens designed for Pentax K-mount digital SLR cameras. It offers a focal length range of 15–30mm on full-frame sensors, delivering expansive 111° to 72° field-of-view, ideal for landscape, architecture, and astrophotography. The constant f/2.8 aperture ensures consistent low-light performance and creative depth control. Its advanced optical construction includes three ED (Extra-low Dispersion) elements and three aspherical elements, effectively minimizing chromatic aberrations and distortion. The lens features a built-in Supersonic Direct-drive Motor (SDM) for fast, quiet autofocus, and a Quick-Shift Focus System for seamless manual override. Built to withstand challenging environments, it boasts weather-resistant construction with special seals and a Super Protect (SP) coating to repel water and grease.

Specifications:

Focal Length:
15–30mm (ultra-wide-angle zoom)

Mount Type:
Pentax KAF3 bayonet mount

Format Compatibility:
Full-frame (35mm) digital SLRs
Also compatible with APS-C, equivalent to approximately 23–46mm

Maximum Aperture:
f/2.8 (constant throughout zoom range)

Minimum Aperture:
f/22

Lens Construction:
18 elements in 13 groups
Includes 3 ED (Extra-low Dispersion) elements and 3 aspherical elements

Angle of View:

• 111° to 72° (on full-frame)

• Approximately 86° to 50° (on APS-C)

Minimum Focusing Distance:
0.28 m (0.92 ft)

Maximum Magnification:
0.20x

Autofocus System:
Supersonic Direct-drive Motor (SDM)
Supports Quick-Shift Focus System for manual override

Diaphragm Blades:
9 blades (rounded for smooth bokeh)

Filter Compatibility:
Not compatible with front-mounted filters (due to built-in lens hood)

Lens Hood:
Built-in petal-type hood

Weather Resistance:
Yes, with special sealing for dustproof and weather-resistant performance

Coatings:

• HD (High Definition) coating for reduced flare and ghosting

• SP (Super Protect) coating on the front element to repel water, oil, and dirt

Dimensions:
Approximately 98.5 mm (max. diameter) x 143.5 mm (length)

Weight:
Approximately 1040 grams (36.7 oz)

Accessories Included:

• Lens cap

• Dedicated soft case

• Built-in lens hood