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.
*** Filter Thread 58 mm ***
Comparable APS-C Focal Length: 82.5 mm
Focal Length 55 mm
Aperture Maximum: f/1.4
Camera Mount Type Pentax K
Format Compatibility Pentax Digital (APS-C)
Angle of View 28.6°
Minimum Focus Distance 1.48' (45 cm)
Maximum Reproduction Ratio 1:5.7
Diaphragm Blades 9
Image Stabilization No
Tripod Collar No
Dimensions (DxL) Approx. 2.8 x 2.6" (7.11 x 6.60 cm)
Weight 13.23 oz (375 g)
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