Pentax HD 70-200mm f/2.8 PENTAX-D FA* ED DC AW Full-Frame Autofocus Lens for K-Mount {77}

Pentax's 70-200mm f/2.8 workhorse built for K-mount shooters

The HD PENTAX-D FA* 70-200mm f/2.8 ED DC AW is the telephoto zoom Pentax K-mount users have needed for demanding work. The constant f/2.8 aperture holds across the full 70-200mm range, giving you the same depth-of-field control and light-gathering ability whether you're at 70mm or pushed out to 200mm. ED glass keeps chromatic aberration in check, and the combination of HD multi-layer coating and Aero Bright coating cuts flare and internal reflections where they typically appear most in high-contrast light.

On APS-C bodies, the 105-300mm equivalent reach makes this a serious option for field and pitch work. Weather sealing with 13 separate seals locks out moisture and dust, so a drizzly sideline or a dusty trail doesn't end your session early. The DC autofocus motor keeps AF acquisition quiet and responsive. The 77mm filter thread aligns with standard pro-kit filter sizes.

For Pentax K-mount shooters who want a fast telephoto zoom that functions in the conditions where most glass hesitates, this lens delivers the optical integrity and build the FA* designation has always stood for.

Who It's For

Sports photographers working K-mount systems get 200mm at f/2.8 with weather sealing rated for field conditions, the 13 seals handle rain and dust without sacrificing AF speed. Wildlife shooters on APS-C cameras gain a 105-300mm equivalent range, extending reach without a teleconverter. Portrait photographers who want subject separation at longer focal lengths will find the constant f/2.8 does the work cleanly with ED glass keeping edges honest. Landscape photographers shooting in variable weather get a lens that travels into difficult conditions without the added anxiety of unprotected glass.

Key Features

• Constant f/2.8 aperture across 70-200mm focal range
• Extra-low dispersion glass elements minimize chromatic aberration
• HD multi-layer and Aero Bright coatings reduce flare and internal reflections
• 13-seal weather sealing blocks moisture and dust
• DC autofocus motor with quiet, responsive acquisition
• 105-300mm equivalent reach on APS-C bodies
• 77mm filter thread aligns with standard pro filters
• Pentax KAF3 mount with full-frame compatibility

FAQ

What makes the f/2.8 constant aperture useful across this focal range?

You get consistent depth-of-field control and light-gathering ability from 70mm through 200mm. At f/2.8, you're not stopping down as you zoom, so a portrait separation at 70mm matches what you get at 200mm without exposure compensation.

How does this lens handle chromatic aberration?

ED glass elements are built into the optical design specifically to minimize color fringing. Combined with the HD multi-layer coating, aberration stays controlled even when shooting high-contrast scenes in bright light.

Is this lens weather-sealed enough for field work in rain?

13 separate seals lock out moisture and dust. It's built to function on wet sidelines and dusty trails without hesitation, though you'll still want to protect the front element and dry it after use.

What's the autofocus speed and noise level?

The DC motor delivers responsive acquisition and operates quietly. You won't get the electronic chirp of some mirrorless designs, so it's suited to sideline shooting and wildlife work where AF noise matters.

On an APS-C body, what's the effective reach?

105-300mm equivalent. That's enough reach for professional sports and wildlife without needing a separate super-telephoto, while keeping the zoom versatility of the 70-200mm base range.

Does the 77mm filter thread work with standard pro filters?

Yes. 77mm is the standard pro filter size, so your existing circular polarizers, ND filters, and protection filters thread straight on without adapters.

How does the optical design minimize flare in backlit situations?

HD coating and Aero Bright coating reduce internal reflections where they typically appear most. In high-contrast light-sun behind a subject, strong side-lighting-you'll see less wash and ghosting than uncoated designs.