New M42 mount adapter. Used old lenses are becoming increasingly popular among camera enthusiasts who use mirrorless cameras and digital SLRs. Among them, the M42 screw mount lens is arguably the representative of old lenses. When using an M42 mount lens with a mirrorless camera or SLR camera, a mount adapter is always required between the lens and the body. Lens side: M42 screw mount Body side: EOS M mount This is a mount adapter for EOS M mirrorless cameras and can be attached to Canon mirrorless cameras (APS-C cameras). ◎EOS M mount models EOS M series (M, M2, M3, M10, M5, M6, M100, Kiss M) *This mount adapter is for mirrorless cameras (APS-C cameras), so it cannot be attached to the same Canon, SLR cameras or mirrorless cameras (full-frame cameras). ◎Main famous M42 mount lenses ・PENTAX Super Takumar 55mm F1.8 ・PENTAX Super Takumar 28mm F3.5 ・Helios-44 58mm F2 ・Yashica Auto Yashinon DX 50mm F1.7 ・FUJIFILM FUJINON 55mm F2.2 If you are unsure whether it can be attached to your mirrorless camera, please feel free to ask. The stopping position of the mount adapter can be adjusted with the included tool, so the direction of the distance scale of the lens can be adjusted. Price negotiation is not possible. Thank you for your understanding.