Canon Macrophoto Coupler FL 55mm lens mount_Nikonos These Nikon filters are designed

These Nikon filters are designed for 39mm drop-in holders- they won't fit in standard 39mm threads (they're flared and coarser than "normal" filter threads)

Focusing works

with a standard lighting stud up top and an extendable reach from 66cm to more than 2m

The Sigma AML-1 46mm Close-up lens is dedicated to the Sigma DP1 camera and enables focusing between 20 to 33cm

Canon Macrophoto Coupler FL 55mm lens mount_Nikonos These Nikon filters are designedThe Canon Macrophoto Coupler FL 55mm is a lens reversing extension tube designed for macro use. You can use it directly on camera or on bellows its totally up to you. Attaches to FD FL cameras and lenses with 55mm filter threads; this also includes the little hood you're meant to mount to the back of the reversed lens. In excellent condition. Lens, camera and bellows are sold separately.