N°163776 · Family detail
PentaxPortrait·PENTAX K mount·1975
Smc Pentax 55mm F/1.8
Specifications01
MountPENTAX K
Focal length55mm
Max aperturef/1.8
TypePortrait · Prime
Release year1975
Weight221 g
Filter size52 mm
Min focus distance0.45 m
Aperture blades6
Optical elements6
Groups5
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings only)
Lens hoodPH-R52 - Clamp-on round
PH-S52 - Clamp-on rectangular
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeStandard prime lens
Summary02
50mm-class standard prime lens for Pentax K mount with a 55mm focal length and f/1.8 maximum aperture, intended for general use and portrait photography with shallow depth of field.
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.