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
There are two types of FD mounts
FD/FL Breech-Mount (with a silver ring, you need to rotate the silver ring when attachment and removal), breech-lock mounts are identified by the silver ring
New-FD Bayonet Mount, bayonet mounts are identified by a red dot next to the lens release button
Here are the steps to install breech-mount version
Operating the adapter
Pentax K Bayonet Mount Lenses Pentax Kr Battery Adapter Adapter Ring For Nikon 18-300mm Lens Bayonet Mount F Mount Lens Converter Pentax Bayonet Mount Lens Pentax Kr Lens Mount Pentax Mount Lens Converter Sears 200mm Bayonet Mount Camera Lens Kr Mount Lenses To Pentax K Pentax Kr Mount Type
Canon Xti Lens Mount Sigma 150-600mm Contemporary Lens Canon Mount Canon 100mm Macro Slide Copy Adapter Canon Wireless Printer Adapter Wa-1e Fuji X100 Zoom Lens Adapter Micro Four Thirds Lens Adapter Sony Fe 17j C Mount Lens Ef Or Mft Lens Mounts Sigma Lens 70-300mm F 4-5.6 Nikon Mount Sony A9 Ef Mount