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:
Samsung Nx Lens Adapter Canon Olympus Pen F Lens Adapter Olympus Pen E Pl1 Lens Adapter Olympus Pen Lens Adapter Olympus Pen Canon Lens Adapter Olympus Pen Ft Lens Adapter Pen F With Adapted Lens Sony E Mount 35mm F.14 Sony E Mount F.95 Sony E Mount F.98
Pentax Stereo Adapter Set Canon 50mm 1.2 M Mount Sony Fs7 Lens Adapters E-mount 200mm Fixed Lens Mount For Super-takumar 50mm 1.4 Lens Nikon Lens L Mount Used Nikon F Mount Lens Sigma 170-500mm F5-6.3 Apo Nikon Mount Sony Sw3 Strap Adapter Sunpak 555 Flash To Sony A99 Adapter