“soratama 72” is made of optical glass and it is able to provide sharp images compared to marbles and acrylic ball. The edge of the metal frame is shaped like a screw and it can be fixed onto your camera by screwing a step-up ring.
The diameter of “soratama 72” is 72mm, and it comes with a 20mm Soratama extension tube. Also, “Extension Tube 72” (sold separately) is a set of Soratama extension tubes ranging from 5mm, 10mm, to 20mm. It is used to adjust the distance between soratama and the camera lens.
Product name：soratama 72
-Circular glass with clear ball in the center.
-Ball lens (optical glass)
-1 piece of Soratama extension tube (filter diameter:72mm length:20mm / alluminum)
Made in Japan
Product name：Extension Tube 72
What’s included：3 pieces of Soratama extension tube
-filter diameter:72mm length:5mm
-filter diameter:72mm length:10mm
-filter diameter:72mm length:20mm
Made in Japan.
Product Introduction : http://zenjix.com/en/products/zenjix-soratama-72