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 Pentax K To Q Adapter Pentax Lens Adapter For Canon Lens Adapter For Pentax Pentax Q Adapter K Sony Xlr K2m Audio Adapter Canon Lens Pentax Adapter Pentax K-1 Lens Adapter Pentax Lens To Lens Adapter Pentax Q10 Lens Mount
Behind The Lens Nd Filter Ef Mount Vintage Lens Sigma 18-50mm F/2.8 For Fujifilm X Mount Sony Alpha Mount Cameras Sony 16-35 2.8 E-mount Best Fisheye Adapter For Canon T Mount For Vivitar Lens Voigtlander 35mm Lens M Mount Lensmate Filter Adapter Sony Rx100iv Smooth Q Sony Action Cam Adapter