High Performance Standard Lens
Featuring a Large Maximum Aperture
With 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