Concept Lens Mount Adapter Pentax Lenses to Canon EF compatible with cameras K&F KF-PKEF (Converts K-Mount Mount) Not full-frame

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Model: KF-PKEF. Genuine Japanese product. Features: Mount conversion. *Cannot be used with full-frame cameras. Compatible lens mount: Pentax K mount. Compatible camera mount: Canon EF mount. It cannot be used with full-frame cameras because it will interfere with the mirror that pops up when the shutter is released. [How to attach a lens] Attach the lens to the mount adapter while pressing outward the lens locking leaf spring located on the inside of the camera mount side of the mount adapter. Once attached, turn the lens clockwise to lock it in place. If the lens does not lock properly when attached, you can adjust it by bending the lens locking leaf spring inward to make it easier to lock. [How to remove the lens] Just like when attaching the lens, you can remove the lens by pushing the lens locking plate spring outward and turning the lens counterclockwise. If the lens mount and lens locking plate spring interfere with each other and you cannot remove the lens, turn the lens clockwise once to remove it.