Pentax SMC DA* 55mm f/1.4 SDM Prime Standard Lens

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High Performance Standard Lens
Featuring a Large Maximum Aperture

Pentax SMC DA* 55mm f/1.4 SDM LensWith super-low-dispersion optical elements, extra-low dispersion (ED) optical elements and PENTAX original lens coatings, the PENTAX DA* 55mm F1.4 SDM lens assures outstanding image quality with clear, high-contrast images, even at image field edges.

It features water and dust resistant sealing for reliable operation in inclement conditions, and the PENTAX Quick-Shift Focus system to allow instant auto-to-manual focus switching. Objective lens surface is treated with PENTAX original Super Protect (SP) coating. This special fluorine compound is applied through a vapor deposition process to create a surface that effectively repels dust, water and grease.

The combination of special lens coatings, ideal curvature and best positioning of optical elements assures optimized digitalimaging characteristics, while effectively minimizing flare/ghosting. It also features a new Aero Bright coating for maximum light transmission, and rounded diaphragm blades to create a more circular aperture for smooth, beautiful bokeh at large apertures.


    The Pentax 55mm f/1.4 DA* SDM Autofocus Lens is a compact and bright short-telephoto lens of the highest order, made exclusively for Pentax digital SLR cameras. In a stocky housing ready for harsh conditions, you'll get a bright f/1.4 aperture-worlds away from the experience you're used to with more common zooms-that opens up new creative doors to you as a photographer.

    This lens was born to shoot between f/1.4 and f/2.8, and comes with a 9-bladed aperture diaphragm which shows up as perfectly round when you stay between f/1.4-2.8. Shoot dramatic portraits with bright point light sources behind the subject, and you'll be dazzled with lovely diffuse, circular out-of-focus highlights that make everybody look better. Beyond portraits, this lens works well any time you would use a moderate telephoto focal length.

    The focusing system of this lens is SDM only; there is no screw on the rear of the lens barrel to have the AF driven by a body-based motor. This allows the lens to move incredibly quick, driven by an internal motor and with the Quick-Shift system providing manual override capacity to you any time you want it with no buttons to switch; but you'll need a Pentax body which allows SDM autofocus (all current Pentax bodies support SDM, but the *IST series does not).

Note! Does NOT provide autofocus upon non-SDM-enabled Pentax cameras.
    Brilliantly-sharp portrait lens which gathers plenty of light
    Completely-rounded aperture diaphragm from f/1.4-2.8 for beautiful out-of-focus highlights
    Speedy SDM autofocus motor provides fast, silent response with Quick-Shift full-time manual override
    Pentax's unique SP water and dirt-repelling coating on both external surfaces
    Pentax's "Aero Bright" internal lens yields high transmissivity and reduced flare
    Dust and moisture-resistant housing
    Essentially equivalent to an 85mm f/1.4 lens upon 35mm SLR cameras

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Lens stylePrime lens  
Max Format Size APS-C / DX  
Lens focal length55 mm  
Stabilization type No (via camera body)  
Camera mount Pentax KAF3  
Angle of view 28.6  
Largest aperture opening F1.4  
Smallest aperture opening F22.0  
Includes aperture ring No  
Total diaphragm blades 9  
Aperture annotations rounded blades  
Total Elements 9  
Number of Groups 8  
Minimum focus distance 0.45 m (17.72")  
Maximum magnification ratio 0.17 x  
Autofocus type Yes  
Full time manual focus Yes  
Focusing method Internal  
Lens distance scale Yes  
Depth of field scale Yes  
Overall weight375 g (0.83 lb)  
Lens diameter 70 mm (2.76")  
Overall length 66 mm (2.60")  
Sealing Yes  
Color Black  
Filter thread size 58 mm  
Filter annotations Does not rotate on focus  
Lens hood included Yes  
Lens hood code PH-RBH 58mm  
Tripod collar included No

Lens Includes
Pentax Telephoto 55mm f/1.4 DA* SDM Autofocus Lens for Digital SLR PH-RBH Lens Hood for SMC DA* 55mm f/1.4 SDM Lens
PentaxPH-RBH Lens Hood
1-Year Warranty
58mm Snap-On Lens Cap
1-Year Warranty
Rear Lens Cap (B) for Bayonet Mount Lenses
Lens Case S90-100 (Soft)

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