Focal length equivalent to 24.5mm to 76.5mm in 35mm film format
This lens has a zoom ratio of 3X or larger from super wide to telephoto for providing an expanded regular shooting range.
Combining F2.8 brightness with a compact, lightweight design
The lens features a large F2.8 aperture in a compact size that is less than 100 mm in length. It enables a broad array of shooting, including landscapes, snapshots, and portraits.
ED (extra-low dispersion) and AL (aspherical lens)
Two ED (extra-low dispersion) glass lenses and three aspherical lenses (two glass-molded lenses and one hybrid lens) are used to correct the chromatic aberration and spherical aberration for enabling delineation performance at all focal lengths.
IF (inner focus) system
The lens length does not change during focusing for easy handling without becoming unbalanced.
Dust-resistant and weather-resistant construction
The various lens components have been sealed for enabling a dust-resistant and weather-resistant construction that was not possible in conventional lenses. This prevents the entry of water and dust into the lens. When combined with the dust-resistant and weather-resistant body of the K10D, this enables superior weather-resistant performance.
Quick-Shift Focus System
If you turn the focus ring after focusing by the AF, focusing instantly switches to the manual focus. This enables smooth focusing operations without the need for a switching operation.
SP (super protect) coating
A special coating is used on the front lens for repelling water and oils. This enables any water and oils on the lens to be easily removed for effective protection of the lens surface.
– Type: Normal Zoom
– Focal length (Equivalent to 35mm format): 16-50mm(24.5-76.5mm)
– Maximum aperture: f/2.8
– Minimum aperture: f/22
– Angle of View: 83°-31.5°
– Lens construction: 15 elements / 12 groups
– Number of diaphragm blades: 9
– Closest focusing distance: 0.3m
– Maximum reproduction ratio: 0.21x
– Filter size: 77mm
PENTAX Pentax / Ricoh RICOH SMC DA 16-50mm f/2.8 ED AL (IF) SDM Lens