Product Highlights

K Mount Lens/APS-C Format
27.5-76.5mm (35mm Equivalent)
Aperture Range: f/4.0-5.6 to 22-32
Aspherical Elements
HD PENTAX & Super Protect Coatings
Direct Current AF Motor
Quick-Shift Focus
All Weather-Resistant Construction
Retractable Design
Rounded 7-Blade Diaphragm


Offering flexibility in a compact package, the K-mount HD PENTAX DA 18-50mm f/4.0-5.6 DC WR RE Lens from Pentax features a retractable design 
which significantly shortens the lens when not in use, and has a versatile 35mm equivalent focal length of 27.5-76.5mm when used with APS-C cameras. 
The aperture is variable with a range of f/4.0-5.6 when wide open, and the lens utilizes aspherical lens elements to ensure edge-to-edge sharpness 
throughout the zoom range. Also, it utilizes both the HD PENTAX coating for limiting flare and ghosting for excellent contrast in your images 
as well as a Super Protect coating to ensure the lens elements aren't easily damaged or scratched.

Smooth, quiet autofocus is possible with the use of a direct current (DC) motor and it has the Quick-shift focus system for quickly switching 
to manual focus. The lens also has ten seals as part of the all-weather resistant construction, limiting potential damage from water, moisture, 
and dust. Additionally, it has a rounded 7-blade diaphragm and comes with a hood and lens caps.

Optical construction of 11 elements in 8 groups 
Angle of view of 76-31.5° 
Fully automatic diaphragm control 
Front filter diameter of 58mm 
Aperture is rounded at 18mm from f/4-5.6 and 50mm from f/5.6-8 


Spec :

Performance
Focal Length     18 - 50mm
Comparable 35mm Focal Length: 27.5 - 76.5 mm
Aperture     Maximum: f/4 - 5.6
Minimum: f/22 - 32
Camera Mount Type     Pentax K
Format Compatibility     APS-C
Angle of View     76° - 31.5°
Minimum Focus Distance     .98' (30 cm)
Magnification     0.23x
Elements/Groups     11/8
Diaphragm Blades     7, Rounded
Features
Image Stabilization     No
Autofocus     Yes
Tripod Collar     No
Physical
Filter Thread     Front:58 mm
Dimensions (DxL)     Approx. 2.80 x 1.61" (71 x 41 mm)
Weight     5.57 oz (158 g)
Packaging Info
Package Weight     0.6 lb
Box Dimensions (LxWxH)     3.9 x 3.8 x 3.4"