N°164860 · Family detail
PentaxMacro·PENTAX K mount·1985
Smc Pentax-A 100mm F/2.8 Macro
Specifications01
MountPENTAX K
Focal length100mm
Max aperturef/2.8
TypeMacro · Telephoto · Prime
Release year1985
Weight470 g
Filter size58 mm
Min focus distance0.31 m
Max magnification1
Aperture blades8
Optical elements7
Groups7
AutofocusNo
StabilizationNo
Aperture controlAperture ring (Manual settings + Auto Exposure setting)
Lens hoodNot required
EraFilm era
Production statusDiscontinued
Additional Info02
Lens TypeMacro lens
Summary02
Pentax K-mount 100mm macro prime lens with a maximum aperture of f/2.8, intended for close-up photography. Provides 1:2 magnification for small subjects at near distances.
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.