New Pentax DA L And DA Lenses

September 21st, 2008 by

Photo-John

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

	smc PENTAX-DA★ 60-250mm f/4 ED[IF] SDM	smc PENTAX-DA★ 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 (on PENTAX DSLR)	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