Mamiya Extension Tube No. 1 (45MM) Pour RB67/217356 | eBay
Amazon.com : Mamiya 301-240 Auto Extension Tube No. 1 for RB SD Camera : Camera Lens Extension Tubes : Electronics
Trying out macro photography with the RB67. I put both extension tubes on with the 250mm lens and this is what it looked like (roll of 120 film for size reference). I
🌟 NEAR MINT+ 🌟 Mamiya RB67 Extension Tube Ring No.1 45mm No.2 82mm Set f... EUR 83,92 - PicClick FR
Mamiya RB67 with 65mm + #2 extension tube : r/mediumformat