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Pentax DA Lens Fact Sheet

smc PENTAX-DA★ 60-250mm f/4 ED[IF] SDM Lens
• When mounted on a PENTAX digital SLR camera body, this zoom lens provides focal lengths from 92mm to 383mm in the 35mm format. The 4.2X zoom ratio covers a broad telephoto range, making it ideal for capturing sporting events and portraits.
• Two extra-low dispersion (ED) optical elements are incorporated into the lens to minimize chromatic aberrations. A unique nonlinear shifting system in the zoom mechanism effectively reduces field curvature aberrations and assures outstanding optical performance at all focal lengths.
• The large F4 maximum aperture is consistant over the entire zoom range for faster shutter speeds and flexible the depth of field control.
• An innovative hybrid AF system offers both extra-smooth, super-quiet SDM autofocus operation using a supersonic motor installed in the lens body, and conventional autofocus operation using a motor built into
the camera body.

smc PENTAX-DA★ 60-250mm f/4 ED[IF] SDM  Lens

smc PENTAX-DA★55mm f/1.4 SDM Lens
• When mounted on a PENTAX digital SLR camera body, this medium-telephoto lens offers a focal length of 80mm in the 35mm format. Coupled with its large f/1.4 maximum aperture, it is ideal for portraiture applications.
• A newly developed Aero Bright Coating enhances lens performance by ef/fectively reducing reflections over a wider wavelength range. Compared to conventional multi-coatings, this new coating greatly improves light transmittance through the lens, while drastically reducing flare and ghosting that deteriorate image quality.
• Rounded diaphragm blades create a more circular aperture for smooth, beautiful bokeh at large aperture settings.
• The advanced SDM mechanism assures extra-smooth, super-quiet autofocus operation using a supersonic motor installed in the lens body. With an SDM exclusive autofocus system, the lens is designed to be quite compact, despite its large maximum aperture.

Pentax Lens Specifications

 60-250mm f/4 ED[IF] SDM
 55mm f/1.4 SDM
 Lens mount  PENTAX KAF2 mount  PENTAX KAF3 mount
 Lens construction  15 elements in 13 groups  9 elements in 8 groups
 Angle of view
 26.5-6.5°  28.6°
 Aperture control  Automatic  Automatic
 Minimum aperture  f/32  f/22
 Number of diaphragm blades  9  9 (rounded blades)
 Metering system  TTL open-aperture metering  TTL open-aperture metering
 Minimum focusing distance  1.1m (3.6 feet)  0.45m (1.5 feet)
 Filter size  67mm  58mm
 Maximum magnification  0.15X  0.17X
 Dimensions (diameter x length)  82mm x 167.5mm
(3.2 inches x 6.6 inches)
 70.5mm x 66mm
(2.8 inches x 2.6 inches)
 Weight  1040g (36.7oz) without hood
1120g (39.5oz) with hood
1230g (43.4oz) with hood & tripod mount
 375g (13.2 oz) without hood
415g (14.6 oz) with hood

Related Content:
Pentax Digital SLR User Reviews
Pentax Zoom Lens User Reviews
Pentax Cameras Forum
Digital SLR Forum
Pentax Digital SLRs Web Site

About the author: Photo-John

Photo-John, a.k.a. John Shafer, is the managing editor of and has been since the site launched back in 1999. He's an avid outdoor enthusiast and spends as much time as possible on his mountain bike, hiking or skiing in the mountains. He's been taking pictures for ever and ever, and never goes anywhere without a camera.

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