Sears 300mm F/5.6 MC

Where 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.