Masuyama Eyepieces
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The eyepieces were developed by renowned optician Dr. Masuyama. Among other things, Dr. Masuyama designed an eyepiece with a focal length of 100 mm, which was used on the historic 60-inch telescope at Mount Wilson Observatory in California. We are pleased to offer you these legendary eyepieces with the latest glass and coating technology.
Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.
- Focal length 50 mm
- Apparent field of view 53°
- Rubber eyecup for comfortable support of the eye or glasses
- 2" barrel without safety groove with filter thread
- 5-element design
- Latest glass types and multi-layer coating technology
- Made in Japan
Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.
- Focal length 60 mm
- Apparent field of view 46°
- Rubber eyecup for comfortable support of the eye or glasses
- 2" barrel without safety groove with filter thread
- 5-element design
- Latest glass types and multi-layer coating technology
- Made in Japan
Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.
- Focal length 20 mm
- Apparent field of view 85°
- Rubber eyecup for comfortable support of the eye or glasses
- 2" barrel without safety groove with filter thread
- 5-element design
- Latest glass types and multi-layer coating technology
- Made in Japan
Apr 30 2025
Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.
- Focal length 26 mm
- Apparent field of view 85°
- Rubber eyecup for comfortable support of the eye or glasses
- 2" barrel without safety groove with filter thread
- 5-element design
- Latest glass types and multi-layer coating technology
- Made in Japan
Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.
- Focal length 32 mm
- Apparent field of view 85°
- Rubber eyecup for comfortable support of the eye or glasses
- 2" barrel without safety groove with filter thread
- 5-element design
- Latest glass types and multi-layer coating technology
- Made in Japan
Features Masuyama Ortho Plössl (MOP) eyepiece 35 mm 53°
- Focal length: 35 mm.
- 53° apparent field of view (AFOV).
- Eye relief: 23.5 mm.
- Modified Plössl optical design with 5 lenses in 3 groups.
- FMC - Fully Multi-Coated optical treatment.
- High refractive index lenses for excellent containment of chromatic aberration.
- Blackened lens edge.
- Retractable rubber lens hood.
- Standard 2"/50.8 mm barrel with threads for in-cell filters.
- Size: 53 mm OD x 104 mm L.
- Weight: 300 g.
- Japanese manufacture with the highest quality standards (Ohi Kohki Co., Ltd.).
Features Masuyama Ortho Plössl (MOP) eyepiece 35 mm 53°
- Focal length: 35 mm.
- 53° apparent field of view (AFOV).
- Eye relief: 28 mm.
- Modified Plössl optical design with 5 lenses in 3 groups.
- FMC - Fully Multi-Coated optical treatment.
- High refractive index lenses for excellent containment of chromatic aberration.
- Blackened lens edge.
- Retractable rubber lens hood.
- Standard 2"/50.8 mm barrel with threads for in-cell filters.
- Size: 53 mm OD x 115 mm L.
- Weight: 320 g.
- Japanese manufacture with the highest quality standards (Ohi Kohki Co., Ltd.).
