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:
Canon 5d Lens Adapter Canon 5d Mk Iv Mount Canon Iv S2 Mount Bc Error Canon Eos 1 Adapter Canon 5d Iv M42 Adapter Canon 5d Plug In Adapter M42 Adapter Canon 5d Metabones Canon Ef Adapter Iv Sony Adapter Srac-a1 Error Sony V Mount Batteries
Laowa 15mm Sony E Mount Canon 5d Mark2 Lens Mount Canon Eos M10 Lens Adapter Leica M Mount Macro Adapter D3400 Adapter For Nikkor Lens Olympus E Pm1 Lens Adapter Turnikit Lens Adapter For Iographer Alpa 9d Lens Mount Nikon Wireless Moblie Adapter Sony E-mount Close Up Lenses