Eyepieces
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Eyepieces
The last link in the optical path are the eyepieces. They are available for special purposes or for universal use. A good eyepiece is just as important as good primary optics.
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
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
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
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
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
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
Jul 28 2025
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
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
- 4-lens Plössl type with ED lenses
- Extremely low chromatic aberration
- 48° field of view
- Extremely sharp image
- Transmission >99%
