PENTAX HD DA 20-40mm F2.8-4 ED Limited DC WR

Enjoy the latest optical technology in the Pentax HD DA lens with a focal length of 20-40mm (30.5 to 61.5mm equiv. to cinema film). It offers a 2x optical zoom and a large aperture of F2.8 at the wide-angle end. It consists of nine optical elements in 8 groups including an ED and SLD glass element. The multi-layer HD lens coating minimises unwanted glare and reflection.
Main advantages:

• Water Resistant
• Exclusive surface
• Quick-Shift focusing system
• Multi-layer lens coating
• Lower reflectivity
• 2x optical zoom
• Autofocus

Furthermore, compared to conventional HD surfaces, it offers up to 50% lower reflectivity in the visible spectrum of light. AF focusing is quiet and smooth so you can achieve a perfectly sharp picture even in challenging lighting conditions. It's the first in this Limited Series to boast a unique HD coating with greater resistance to water and dust.
Specifications:
Type:
Zoom Lens
Mounting:
Pentax K
Focal length:
20-40mm
Lens construction:
9 elements in 8 groups
Aperture:
2.8 - 4
Minimum aperture:
32
Number of diaphragm blades:
9
Filter thread diameter:
55mm
Viewing angle:
70° - 39°
Minimum focus distance:
28cm
Magnification ratio:
0.2x
Weight:
283g
Length:
69mm
Accessories:
Sun visor
Cover
Case