For the benefit of the EMS-BINO planners, I will show the anatomy of the “light path” of the EMS-UL. The total light path of the EMS consists of three parts.
Path “A” is the distance from the bottom of the barrel to the first reflection point, that is 2 + 18 = 20mm.Path “B” is the distance from the first reflection point to the second one, that is 18+2+12+2+18 =52mm.Path “C” is the distance form the second relfection point to the top surface of the 2-inch sleeve, that is 18 + 2 + 58 = 78mm. So, the total light path is A + B + C = 20 + 52 + 78 =150mm.
Helicoid tubes and IPD-Crayford tubes, each has its merit and I have chosen one of them in the cases.
The main problems of the commercial helicoid tubes for camera parts are the lack of enough rididity and the end shape that needs to be processed to connect to other telescopic parts.
Now, I have successfully developed this new helicoid perfectly speciallized for binoscopic use.I can definitly say that it is more riｇid than any other commercial helicoid tubes planned for camera parts.This is designed for the heavy use of binoscope back that will hold EMS and heavy oculars at a time.Both ends are tapered boss that will fit into the 50.8mm standard sleeves. This means it is easily used reversible on left or right EMS for the ergonomical hand operations.