正立ミラーシステム（EMS）を開発した松本龍郎のサイト。 たった２回の反射で天体望遠鏡の像を正立像にします。Tatsuro Matsumoto; Inventor of the EMS, Erecting Mirror System. EMS offers non reversed upright image with no additional undesirable abberations.
カテゴリー: BINO Progress Report / 製作状況速報
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Operate the helicoids simultateously with both hands so that the helicoids turns symmetrically with each other. Never turn the helicoid too strongly beyond the both end limit. I recommend you to keep away from the stroke limit area for the gentle care of the helicoids.
Today is the commemorative day of the larger helicoid to be finished.It is not only larger in size, but perfectly designed to perform the ergonomic IPD adjustment with the helicoid.The left handed helicoid and the right handed one are provided. The bottom end is 65mm tapered male flange and the top end is 65mm female sleeve. The shortest hight without flange is 27mm and the longest 43mm. (stroke is 16mm)
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. *The light path of EMS-UL is shortened by 2mm on July 21,2017. Now, the correct light path of the standard EMS-UL is 148mm.(2018,11/05)
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.