Reversing Adapter Canon EF-Mount

For owners of Canon EOS wide-angle or zoom lenses, the EOS-RETRO opens up the world of extreme close-up photography with outstanding quality. The EOS-RETRO lets you mount the lens in reverse position on the camera. The ring transfers all control functions. Example: With a Canon EOS 28-105 mm zoom lens in reverse position, you get an image ratio of 1:7 with a focal length of 105 mm from 1:7 to 2.8:1 at 28 mm. This is a wider setting range than is possible with a macro lens. The EOS-RETRO is supplied standard with a 58 mm filter diameter. Stepping rings are available for other filter sizes. In order to protect the sensitive rear lens element we supply a high quality, multi-layered protection filter coming with the EOS-RETRO. Technical specifications: Size: 75 mm (2.95?) Weight: 160 g (0.35 lbs) Maximum extension: 550 mm (21.65?)