Product Overview

Built for shooters who live behind the viewfinder, the HD PENTAX-D FA 21mm F2.4ED Limited DC WR is a compact ultra‑wide prime that punches well above its weight. On full-frame K‑mount bodies it delivers a sweeping 92° field of view, perfect for big skies, tight interiors and dramatic foreground‑to‑horizon landscapes. The fast f/2.4 aperture keeps your shutter speeds up in low light and gives you surprisingly natural background blur for an ultra‑wide, so you can isolate subjects without losing the story around them.

This Limited‑series lens is all about real‑world reliability and feel. The all‑metal barrel, built‑in hood and weather‑resistant sealing are made for dusty tracks, sea spray and sudden downpours, while HD and SP coatings keep contrast high and flare low when the Aussie sun is doing its worst. A quiet DC autofocus motor with Quick‑Shift lets you snap from AF to manual in an instant, and the close‑focus design (down to 0.18 m with 0.26x magnification) makes it a weapon for detail‑rich foregrounds and environmental portraits. If you want a tough, premium wide‑angle that you can leave on the camera all day, this is it.

Key Features

• 21mm ultra-wide-angle prime lens delivers expansive views ideal for landscapes, architecture and environmental scenes, giving you dramatic perspective without the bulk of a zoom.
• Bright f/2.4 maximum aperture supports handheld shooting in low light and allows creative depth-of-field control for subject isolation and smooth background blur.
• High-grade HD multi-layer coating and SP (Super Protect) coating reduce flare, ghosting and surface contamination, helping maintain contrast and clarity in backlit or harsh outdoor lighting.
• Advanced optical design with ED and Super ED glass elements minimises chromatic aberration, providing sharp, high-resolution images from centre to edge.
• Weather-resistant (WR) construction with multiple seals helps protect against rain, mist and splashes, making it a reliable choice for field use in unpredictable conditions.
• DC autofocus motor with Quick-Shift Focus System (QFS/M) offers fast, quiet AF and instant manual override, giving precise control when fine-tuning focus.
• Electromagnetic diaphragm mechanism enables accurate, consistent exposure control for both stills and video, especially during continuous shooting.
• Close focusing distance of 0.18 m and 0.26x maximum magnification let you get in tight on small subjects while still capturing a wide slice of the environment.
• Compact aluminium barrel, hood and cap provide a premium feel and robust durability, while keeping the lens lightweight enough for all-day carry.
• Designed for full-frame K-mount DSLRs and equally at home on APS-C bodies, offering a versatile 32mm-equivalent field of view for everyday shooting.