Camdiox 12mm f/2.0 manual super wide angle lens for APS-C mirrorless camera - Canon EOS M Fujifilm Sony Olympus OM-D Mount:Fujifilm X extension of helicoid ring is

extension of helicoid ring is about 27mm to 59mm

It is made by brass with coating

so diaphragm control of the lens is set manually

7x EF-MFT AF Auto Focus Adapter

Camdiox 12mm f/2.0 manual super wide angle lens for APS-C mirrorless camera - Canon EOS M Fujifilm Sony Olympus OM-D Mount:Fujifilm X extension of helicoid ring isCamdiox 12mm f2. 0 APS C super wide angle lens for mirrorless camera + Camdiox CPRO UV filter as gift Silver color Compact sized manual control super wide angle lens, lightweight and easy to carry. Close to zero distortion (q<1. 5%), construct with 2 aspherical elements. Its lightweight design is best fit to APS C mirrorless camera bodies. Equivalent to 18mm to film format on APS C cameras (24mm on M4 3 cameras). Specification Full frame available: