N°196100 · Family detail
PentaxZoom·PENTAX K mount·2013
HD Pentax-DA 20-40mm F/2.8-4 ED DC WR Limited
Specifications01
MountPENTAX K
Focal length20-40mm
Max aperturef/2.8
TypeZoom
Release year2013
Weight283 g
Filter size55 mm
Physical length69 mm
Min focus distance0.28 m
Max magnification0.2
Aperture blades9
Optical elements9
Groups8
Min aperturef/4
AutofocusYes
StabilizationNo
Aperture controlNone
The aperture is controlled from the camera
Lens hoodMH-RA55 - Screw-type round
TeleconvertersHD Pentax-DA 1.4X AF Rear Converter AW→ 28-56mm F/3.9-5.6
EraDigital era
Production statusIn production
Additional Info02
Lens TypeStandard zoom lens
Summary02
HD Pentax-DA 20-40mm F/2.8-4 is a Pentax K-mount zoom lens with a variable maximum aperture. It covers wide to standard focal lengths for general photography and is weather resistant.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Pentax K mount has a flange distance of 45.46 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Pentax DA and FA J lenses have no aperture ring. Use an adapter with its own aperture control.
- Pentax DA lenses are made for APS-C.
- Sony EAdapter · 27.46 mm
- Canon RFAdapter · 25.46 mm
- Nikon ZAdapter · 29.46 mm
- Fujifilm XAdapter · 27.76 mm
- L-MountAdapter · 25.46 mm
- Micro Four ThirdsAdapter · 26.21 mm
- Fujifilm G (GFX)Adapter · 18.76 mm
- Canon EF-MAdapter · 27.46 mm
- Canon EFAdapter · 1.46 mm
A rear element that sticks out can hit the camera mirror.
No plain adapter reaches infinity focus on: Nikon F.
Other Mounts03
No alternate mounts are indexed for this family yet.