N°100192 · Family detail
PentaxWide·PENTAX K mount·2021
HD Pentax-D FA 21mm F/2.4 ED DC WR Limited
Specifications01
MountPENTAX K
Focal length21mm
Max aperturef/2.4
TypeWide · Prime
Release year2021
Weight416 g
Filter size67 mm
Min focus distance0.18 m
Aperture blades8
Optical elements11
Groups8
AutofocusYes
StabilizationNo
Aperture controlNone
The aperture is controlled from the camera
Lens hoodBuilt-in petal-shaped
TeleconvertersHD Pentax-DA 1.4X AF Rear Converter AW→ 29.4mm F/3.4
EraDigital era
Production statusIn production
Additional Info02
Lens TypeUltra-wide angle prime lens
Summary02
HD Pentax-D FA 21mm F/2.4 is a 21mm prime wide-angle lens for the Pentax K mount, suitable for general wide views and low-light work at f/2.4. It is weather-resistant (WR) and designed for APS-C/full-frame Pentax cameras (as applicable).
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.