- Classic Abbe Orthoscopic eyepieces – generally called “Masuyama Ortho”
- Made in Japan
- Manufacturer : Ohi Optical Manufacturing Co., Ltd.
- Perfect eyepieces for solar viewing due to less number of lens surfaces and sharpness at the center of FOV
- More affordable pair of eyepieces for binoscope or bino-viewer.
- Ohi Optical, as known as Masuyama, has been producing the high quality eyepieces under their brand-name or 3rd party brands over 70 years at Ohi district in Tokyo besides Nikon factory.
History of Ohi Optical/Masuyama
