Anthis/Nexus Focus Gear FG-EFM100F28 for Canon EF 100mm F2.8 Macro Lens @lensmount the larger diameter reduces edge

the larger diameter reduces edge distortion on pictures taken with certain super-wide angle lenses and makes shooting over-under shots (half-in

the Fiber Optic Cable 19L is more resistant to distortion

Panasonic "eneloop"

The lens barrel has threaded wall to adjust lens position back and forth to accommodate with different master lenses among many compact digital cameras (*6)

Anthis/Nexus Focus Gear FG-EFM100F28 for Canon EF 100mm F2.8 Macro Lens @lensmount the larger diameter reduces edgeThis focus gear enables manual focus adjustment for the Canon EF 100mm F2. 8 Macro lens via the housing's focus zoom knob when used with Anthis Nexus dSLR housings.