The Novoflex FUG-RETRO opens up the world of close-up and extreme macro photography with exceptional quality to owners of Fujifilm GF wide-angle or zoom lenses. The lens is mounted on the camera body in an inverted position using the inversion ring. The inversion adapter provides a complete electronic transition of all control functions. The FUG-RETRO reverse adapter has a 77 mm filter thread. Optional step-up rings are available for lenses with other thread diameters. The combination of the FUG-RETRO and the universal bellows of the BALPRO series (BALPRO-1, BALPRO T/S and CASTBAL-PRO) turns them into full-fledged automatic bellows for the Fujifilm GFX. BALPRO T/S also features tilt/shift functionality for close-up and macro ranges. The reversing ring allows lenses to be connected to the bellows in either the normal or reverse position. No separate connection rings are required to connect the FUG-RETRO to the BALPRO bellows. The V-groove for attachment to the bellows standard is provided on both sides of the reversing ring. The combination of FUG-RETRO with the BALPRO-1 bellows is also available as a pre-configured BAL-FUG set. FUG-RETRO is equipped with a 77 mm filter thread on the back of the lens mount for the use of macro filters and ring lights.