A fast, standard zoom featuring a sophisticated optical design, the Pentax HD D FA 24-70mm f/2.8ED SDM WR Lensfrom Pentax HD D FA 24-70mm f/2.8ED SDM WR Lensis designed for use on full-frame K mount DSLRs, as well as APS-C cameras where it provides a 36-105mm equivalent focal length range. The constant f/2.8 maximum aperture offers consistent performance throughout the zoom range and pairs with a rounded nine-blade diaphragm to produce smooth shallow depth of field imagery. The lens' design incorporates a trio of extra-low dispersion elements, three aspherical elements, and one anomalous dispersion aspherical element to control a variety of aberrations and distortions in order to produce well-corrected images with notable sharpness and even illumination. An HD coating has also been applied to further benefit working in difficult lighting conditions by suppressing lens flare and ghosting for increased contrast and color neutrality.

Complementing the optical performance of the lens is a Supersonic Direct-drive Motor, which offers fast, quiet, and quick autofocus performance that is ideal for both stills and video shooting. A weather-resistant construction is also featured, for working in harsh environments, and a Quick-Shift Focus System and zoom lock lever offer intuitive handling and control.

K Mount Lens/Full-Frame Format    Aperture Range: f/2.8 to f/22    Three Aspherical & Three ED Elements    Anomalous Dispersion Aspherical Element    HD Lens Coating    Supersonic Direct-Drive Autofocus Motor    Quick-Shift Focus, Zoom Lock Lever    Weather-Resistant Construction    Rounded 9-Blade Diaphragm

Standard 24-70mm zoom lens is designed for Pentax K mount full-frame DSLRs/SLRs and is also compatible with APS-C models where it will provide a 36-105mm equivalent focal length range.

Fast f/2.8 constant maximum aperture offers consistent performance throughout the zoom range, benefits working in difficult lighting conditions, and offers greater control over focus position for shallow depth of field applications.

A 17 elements in 12 groups design features three extra-low dispersion elements, three aspherical elements, and one anomalous dispersion glass-molded aspherical element. This combination helps to substantially reduce chromatic aberrations and various distortions throughout the zoom range and also offers enhanced sharpness, clarity, and edge-to-edge illumination throughout the aperture range.

An HD coating has been applied to lens elements to minimize flare and ghosting for increased contrast and color neutrality when working in harsh, backlit lighting conditions.

A Supersonic Direct-drive Motor (SDM) benefits autofocus operation with smooth, quiet, and accurate performance to support both stills and video applications.

A weather-resistant construction incorporates five weather seals to protect against moisture for working in inclement conditions.

A rounded nine-blade diaphragm contributes to a pleasing out-of-focus quality when working with selective focus and shallow depth of field techniques.

Quick-Shift Focus System lets you manually control focus at any time, even when working in AF mode, by simply rotating the focus ring.

A zoom lock lever prevents the lens from extending under its own weight when carrying.

Related Questions and Answers

Q: 1. Is this lens compatible with the Pentax K20 D?

A: I think it would work (it works on my K3 II), but it wouldn't be my recommendation. This lens is intended for a full sensor camera, such as the K1. For the K20D, you would be better off with the Pentax DA* 16-50mm F/2.8. It's a great lens, which is intended specifically for crop sensor cameras. It's a better lens for the K20D and will save you some money.

Q: 2. Would you recommend this lens for portraits?

A: For portraits, a longer lens such as 85mm or more is recommended. A 15-30mm would be too distorted for portraiture. This 85mm would be a better option: https://bhpho.to/3dldCD4

Q: 3. Does the supplied hood for this lens feature the usual cutout to adjust filters like other Pentax lenses?

A: Absolutely, it's a fine lens. It's my everyday lens.

Q: 4. Is this cap Center Pinch ? I will use it on a Hood that requires center-pinch caps.

A: IF DIAMETER OF THE INNER SCREW THREADS(EX55mm INNER LENS TREAD MATCHES OUTER PINCH CAP THREADS) THE ANS. IS YES. YOURS TRULY DR PETE

Q: 5. Has anyone had focus shift problem?

A: I am unhappy with camera (k1) and lenses, am sending all off to service centre next week (16 July)

Q: 6. Is this an internal focusing lens?

A: It is. And pretty much spot - on. It is my day to day workhorse for Real Estate Photography.

Q: 7. Does this lens come with a tripod collar?

A: It does not.

Q: 8. Is this an internal zoom design or does the lens extend when zoomed towards long end? Thank you.

A: It is not internal zoom. It extends about 2-3 inches at 70mm.

Q: 9. Will this also fit Pentax 645 28-45? It is also 82mm.

A: I don't see why not as long as the same size cap.

Q: 10. Is there a filter holder/system for this?

A: Unfortunately, there are no filter holders/systems being offered for this lens just yet. Please check periodically for updates as they become available.