Material: Aluminium Alloy
Extension Ring Height: 16mm 19mm 22mm 32mm
Inside Diameter of the ring is about 20mm
Application: This can be used to match a variety of different parfocal lengths, can extend the parfocal length by 12mm or 15mm or 18mm or 28mm.
We are microscope adapter ring directly. We supply SLR to C mount, C-mount to Canon, C mount to Nikon, C to 23.2, M42 to C, M42 to 23.2MM, M42 to 30mm, M42 to RMS, M42 to M48, M42 to Canon/Nikon,etc. More products and details, please visit our official web: www.zzkate.com/en/. thank you very much.