二手 Mamiya Auto Extension Tube No.2（用於 Mamiya RB）

The auto-extension tube locks into place with a satisfying click, and having both the front and rear caps included saved me from hunting for extras. The 100-day warranty gives peace of mind for used gear, and the manual was a nice bonus.

Everything arrived exactly as pictured, and the tube locks onto my RB lens with a satisfying click—no wobble at all. The included front and rear caps plus the 100-day warranty made buying used feel a lot less risky.

The original box and manual were a nice surprise, and the rear cap fits snugly—no light leaks. Focus is smooth, and the 100-day warranty gives peace of mind for a used piece.