N°102852 · Family detail
SigmaFisheye·PENTAX K mount
Sigma 4.5mm F/2.8 EX DC HSM Circular Fisheye
Specifications01
MountPENTAX K
Focal length4mm
Max aperturef/2.8
TypeFisheye · Wide · Prime
Weight470 g
Physical length78 mm
Min focus distance14 m
Summary02
Sigma 4.5mm f/2.8 circular fisheye prime for Pentax K, an ultra-wide lens intended for creative wide-angle and distortion effects. Works for low-light wide-angle shooting at its maximum aperture.
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.
Sources03
dpreview.comVisit ↗
Other Mounts03
This lens family is also indexed in 4 other mounts.