![](http://ems-bino.com/wordpress/wp-content/uploads/2022/03/176bn220321-1-1024x564.jpg)
Preliminary assembly for the COG and the back-focus measurement.
![](http://ems-bino.com/wordpress/wp-content/uploads/2022/03/276bn220321.jpg)
The IPD-range of 60-74mm is secured with the standard EMS-UL with IPD-Helicoid set. (D=156mm)
Innovation of Astronomical Telescope
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.