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:
Asahi Pentax Stereo Adapter Pentax Stereo Adapter Set Asahi Pentax Lens Adapter Asahi Pentax Nikon Adapter Asahi Pentax Stereo Adapter 49mm Asahi Pentax Stereo Adapter 52mm Pentax Stereo Adapter 3d Set Pentax Stereo Adapter D Set Pentax Stereo Adapter Ii Vs D Set Sony Digital Media Player Adapter
C Mount Lens Mount Sigma 10 20mm Pentax Mount Sony A7s Pl Mount Canon F And Fd Mount Canon Ip110 Mobile Adapter Canon Vixia Wide Angle Adapter Screw Thread Lens Mount Wiki Sony Nikon Criticiam Of Sony E-mount Sony Nex Md Adapter Sony X Mount Lenses