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.
I would like you to know EMS is always evolving. Mirror shape was improved a few years ago, then the extension tube is improved, and recently, the end of the barrel was improved so that it can accept 48mm filters. お気づきでないかも知れませんが、EMS-ULも常に改良しています。 数年前にミラー形状が改良され、その後延長筒の短縮と構造の合理化、そして、最近、バレル先端の48mmフィルターネジを少し深くすることで、遮光リングを取らなくても、そのままフィルターがセットできるようにしました。
There are cases that your OTA does not have enough back-focus for the IPD-Helicoid, or you wish your Binoscope as compact as possible. In those cases, you had to choose the sliding mount instead of the IPD Helicoid. But, if you insist on the solid (fixed) structure of the Binoscope with the minimum OTA span (“D”), you will wish zero-profiled IPD adjuster. Today, the experiment is successful.