Compare Pentax-DA 20-40mm F2.8-4

Construction

Aperture Blades
9 blades, Rounded aperture
Colors
Black, silver
Form Factor
Standard Zoom Lens
Image Size
APS-C
Lens Barrel
Distance scale, DoF scale
Lens Mount
Pentax K-mount
Material
Aluminium barrel
Motor
Micromotor
Optical Formula | Elements
9 elements
Optical Formula | Groups
8 groups
Optical Formula | Special Glass
1 ED glass element, 1 SLD glass element, HD coating groups

Dimensions

Filter Diameter
55 mm / 2.17 in
Size | Diameter
71 mm / 2.80 in
Size | Length
69 mm / 2.72 in
Weight
283 g / 10.00 oz

Function

Angle Of View
71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (wide) ~ 39.7° Diagonal | 33.4° Horizontal | 22.6° Vertical (tele)
Aperture
f/2.8–4 ~ f/22–32
Autofocus
Yes
Crop Factor
1.5
Focal Length
20 mm ~ 40 mm
Focal Length (35mm Equivalent)
30.0 mm ~ 60.0 mm
Image Stabilization
No
Weather Resistance
Yes
Zoom Type
External zoom

Performance

Max Magnification
0.2x
Min Focus Distance
280 mm / 11.02 in

Production

Accessory
Lens Hood: MH-RA55 (supplied)
Debut
2013-11-06

Reviews

Neofiliac score
50%
Pros
  • Weather-sealed
  • Beautiful construction for manual focusing
Cons
  • External zoom without zoom lock
  • Not the most interesting focal range

Price

MSRP
800 USD
Offers (incl. referral links)
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