This is a Phase One 645 AF Auto Extension Tube #1 NA 401. This tube will go between your lens and camera body to allow you to get greater magnification and allow you to focus closer. Use one tube or mount another one for even greater control.
This tube is in EXCELLENT condition and looks beautiful. Comes with both the front and rear caps.
WE SHIP IN 1 BUSINESS DAY and we package professionally. We are interested in BUYING your photographic equipment as well. We are Camera Exchange located in Waterford, Michigan.