kfconcept
Please note: our M42 adapter ring could not be suitable for Pentax Takumar Super Takumar Carl Zeiss M42 series(aperture pin does not fully depress, small tabs sticking out), as ours depresses the aperture pin all the way down
If your camera indicated "lens is not properly installed", please modify the camera menu settings. Usually called the "release the shutter the lens is not installed", you can modify the settings to allow. Specifically refer to the camera manual.Following are some examples:
Pentax K1000 Lens Adapter Pentax K1000 Lens Mount Pentax K1000 Lens Mount Type Aluminum Canon Ef Mount Kalimar Lens Adapter For Canon Kalimar Lens Adapter For Nikon Asahi Pentax K1000 Lens Mount Pentax K1000 Lens Mount Dimensions Pentax K1000 M42 Adapter Pentax K1000 K Mount
E-m10 Mark Ii Lens Filter Nikon D7200 Lens Mount Type Canon Eos Wide Angle Adapter Lens Adapters For Nikon Body Nikon Screw Lens Adapter Best Fixed Focal Length Sony A-mount Lens Yashica Fx3 Super 2000 Lens Mount Nikon F Mount Lenses Price Sigma Super Telephoto Sony Mount Sony E Mount Tamron 10-24