Canon Macrophoto Coupler FL 55mm brand_Stearman Press This Sennheiser Wireless kit includes

This Sennheiser Wireless kit includes one Sennheiser SK100 Bodypack Transmitter

A nice little lens for 4x5 field cameras

but designed specifically for modern mirrorless cameras

The Sony FA-HS1AM does two potentially useful things: First

unprotected rear element sticking out the back

Canon Macrophoto Coupler FL 55mm brand_Stearman Press This Sennheiser Wireless kit includesThe 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.