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 Q Lens Adapter 100 Mm C Mount Lens Pentax K To Q Adapter Pentax Lens Adapter For Canon Lens Adapter For Pentax Pentax Q Adapter K Pentax 645d Lens Adapter Pentax K-1 Lens Adapter Pentax Lens To Lens Adapter Pentax 645d Lens Mount
Lens & Filter Adapter Rings Variable Nd Filter Lens Adapter E Mount Telephoto Zoom Lens Viltrox Nikon Z Mount Canon Eos 760d Mount Type Canon Dslr Battery Wall Adapter Canon T5i Battery Adapter 1.1 C Mount Lens Fotodiox Pro Fusion Mkii Nikon-sony E-mount Sony E Mount Zeiss Zoom