This Lens Adapter from Rayqual allows you to mount a Pentax K mount lens on your Canon RF-mount camera. The flange depth has been tested with a variety of camera bodies and lenses to deliver exacting performance and maintain infinity focus. It supports manual focusing in both Manual and Aperture Priority modes, and though autofocus is not supported, the adapter does allow you to use depth of field preview and stopped down metering if your camera and lens support it. Please note that when using In-Body Image Stabilization (IBIS), the focal length should be set in the camera. Made in Japan, the adapter has been designed and manufactured to maintain a parallel optical pathway while eliminating internal reflections.