Masuyama Eyepieces

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.

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In collaboration with Mr Masuyama of Masuyama eyepiece fame, Kokusai Kohki has gone out on a limb in introducing a truly new eyepiece, the 3 inch barrel size Masuyama 80mm.

Specifications:
  • Eyepiece type: High End
  • Eyepiece size: 3 inch (76.2mm)
  • Eyepiece brand: Kokusai Kohki
  • Eyepiece series: Masuyama
  • Apparent field of view: 52°
  • Focal length (mm): 80mm
2195.00 € 1975.00 €
Delivery date : 4-8 weeks
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 10 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
239.00 € 215.00 €
Delivery date : 1-4 days
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 12.5 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
239.00 € 215.00 €
Delivery date : 1-4 days
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 15 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
239.00 € 215.00 €
Delivery date : 1-4 weeks
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 20 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
239.00 € 215.00 €
Delivery date : 1-4 days
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 25 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
249.00 € 224.00 €
Delivery date : 1-4 days
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 30 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
249.00 € 224.00 €
Delivery date : 1-4 days
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 5 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
239.00 € 215.00 €
Delivery date : 1-4 days
 
 

This Masuyama premium planetary eyepiece from Japan offers the best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 7.5 mm
  • Apparent field of view 53°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without locking groove, with filter thread
  • 5 elements in 3 groups
  • Latest lenses and multi-layer coating technology
  • Developed and manufactured by Ohi Kohki Co. in Japan
  • Made in Japan
239.00 € 215.00 €
Delivery date : 1-4 days
 
 

Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 10 mm
  • Apparent field of view 85°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without safety groove with filter thread
  • 5-element design
  • Latest glass types and multi-layer coating technology
  • Made in Japan
269.00 €
Delivery date : 1-4 days
 
 

Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 16 mm
  • Apparent field of view 85°
  • Rubber eyecup for comfortable support of the eye or glasses
  • 1.25" barrel without safety groove with filter thread
  • 5-element design
  • Latest glass types and multi-layer coating technology
  • Made in Japan
329.00 € 296.00 €
Delivery date : 1-4 days
 
 

Masuyama premium eyepieces from Japan offer best contrast, improved color rendition and better sharpness at the edge.

  • Focal length 45 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
539.00 € 485.00 €
Delivery date : 1-4 days