K&F Concept KF-42L (M42 mount lens → L mount conversion) mount adapter Almost unused. All accessories are shown in the first photo. (No missing accessories) *This is an adapter to convert M42 mount lenses to L mount. Please be careful not to make a mistake with the mount. *Although it is in a condition very close to new, it is a used item. Please purchase only if you understand this. *Returns are not accepted to prevent troubles such as product switching.