Fotodiox Pro Lens Mount Adapter Compatible with M42 Type 1 Screw Mount – Fotodiox, Inc. USA
Need Help; Purchased a Helios 44-2 lens and a L39 to RF lens adapter but it's as if the lens is too close to the sensor to focus. For example I can't
Amazon.com : Fotasy Adjustable M42 Lens to Cannon EF-M Mount Adapter, M42 EFM, M42 EOS M Adapter, Compatible with Canon EF M Mount Mirrorless Cameras EOS M M1 M2 M3 M5 M6
HELIOS 44m-4 Lens Canon EOS EF Mount T3 T4 T5i T6 i 7D 6D 5D Mark II III IV : Electronics - Amazon.com