Tube Lengths:20mm
Material:Plastic
Color:Black
Applicable Model:For sony lens

This is used by attacking Between camera body and lens of
the 41mm single-reflex camera, It couples perfectly with
the camera's automatic diaphragm.With cameras of TTL,AE(Through-the
Lens,Automatic Exposure)type it gives perfect coupling except when combined with
electronicflash AE uniit.