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 Asahi Lens 500mm Canon Adapter Lens Adapter For Kodak Z71215 Asahi Pentax K1000 Lens Mount Asahi Pentax Nikon Adapter Asahi Pentax M42 Adapter Asahi Pentax Stereo Adapter 49mm Asahi Pentax Stereo Adapter 52mm Asahi Pentax Stereo Adapter Set Asahi Pentax S3 Mount
Mft To Full Frame Adapter Fuji To Nikon Z Adapter Sony E Mount 1.4 Metabones Adapter Nikon To Fuji Tamron Canon Mount 10-24 Hasselblad Lens Mount Adapter 40037 Lens Adapter For T-mount Camera Pentax 67 Adapter Astrophotography Otg Adapter Sony Xperia Z3 Sony Alpha A6000 M42 Adapter