Pentax SMC HD DA 20-40mm f/2.8-4 ED DC WR

Pentax SMC HD DA 20-40mm f/2.8-4 ED DC WR
$596
20-40 mm
autofocus 2x zoom lens
f/2.8-4
variable aperture
  • Generic motor Built-in focus motor

compatibilitywith digital cameras

Full frame

This lens is compatible with Full frame cameras such as the Pentax K-1.

Pentax K-1
83.8 - 48.3°
horizontal angle of view
20-40mm
35mm equivalent focal length

APS-C (1.5x crop factor)

This lens is compatible with APS-C (1.5x crop factor) cameras such as the Pentax K-70 and Pentax KP.

Pentax K-70
60.9 - 32.7°
horizontal angle of view
30.5-61.5mm
35mm equivalent focal length

Pros

The Pentax HD DA 20-40mm f/2.8-4 ED DC WR vs other Digital camera lenses

Auto focus Supports autofocus Help
Easier to use

Cons

The Pentax HD DA 20-40mm f/2.8-4 ED DC WR vs other Digital camera lenses

Fixed aperture Variable aperture Help
Narrower aperture at longer focal lengths
Prime lens Zoom lens Help
Typically not as sharp as prime lenses

Specifications

General

Min focal length
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20 mm
Max focal length
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40 mm
below average below average
Zoom range
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2x
Magnification
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1:5 (0.2)

Aperture

Wide maximum
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f/2.8
Wide minimum
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f/22
Tele maximum
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f/4
Tele minimum
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f/32
above average above average

Features

Auto focus
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Yes
above average above average
Focus motor
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Generic motor
Image stabilization
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None
Fisheye
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No
Tilt-shift
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No

Form factor

Lens mount
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Pentax K
Length
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69 mm
above average above average
Diameter
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71 mm
Filter size
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55 mm
Weight
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283 g

Angle of view

Wide horizontal
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61.1°
Telephoto horizontal
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32.9°
Wide vertical
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42.9°
Telephoto vertical
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22.2°
Wide diagonal
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70.6°
Telephoto diagonal
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39°

Competitors

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