The Pentax HD DA Fisheye 10-17mm f/3.5-4.5 ED Lens is a high-performance, ultra wide-angle zoom lens for K-mount APS-C cameras. Its 35mm focal length equivalency is 15.0-25.5mm with a 180° view at the 10mm setting that takes in more than the human eye sees, with a dramatic curvature of field. At the 17mm end of the zoom, it is a very wide-angle lens. This lens also features an HD lens coating and an optical design with an ED element that effectively compensates for chromatic aberration for extra-clear, high-contrast images.

This lens may be used with cameras using APS-C size sensors, and with cameras using full-frame sensors. A circular fish-eye image can be achieved when mounted on a Pentax full-frame camera body. Additionally, this lens's hood is removable to provide greater coverage and less vignetting on full-frame cameras.

An SP (Super Protect) coating on the front lens elements repels dust, water, and grease to help maintain peak performance.

15 to 25.5mm Focal Length Equivalency and f/3.5-4.5 Maximum Aperture

Fisheye zoom 10-17mm f/3.5-4.5 lens is designed for APS-C-format Pentax K-mount DSLRs, where it provides an 15-25.5mm equivalent focal length range and provides a 180-degree diagonal angle of view.

HD Lens Coating

This lens has been treated with the PENTAX-developed HD coating, a high grade, multi-layer coating that reduces unwanted reflection, allowing the user to capture high-contrast images free of flare and ghosting.

Quick-Shift Focus System

The Quick-Shift Focus System allows instant switching from autofocus to manual focus operation.

SP Lens Coating

The PENTAX SP (Super Protect) coating on the front lens elements repels dust, water, and grease to keep your lens clean and your images sharp.

Optical Design

The ED (Extra-low Dispersion) glass in this lens effectively compensates for chromatic aberration for extra-clear, high-contrast images.

Rounded Diaphragm Blades

Enhanced with a rounded six-blade diaphragm at the wide apertures for optimal optical performance and gorgeous bokeh effects.

Removable Bayonet Hood

Removable bayonet lens hood for nearly circular fish-eye images on a full-frame Pentax camera body.