Eyepieces

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.

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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 size: 3 inch (76.2mm)
  • Eyepiece brand: Kokusai Kohki
  • Eyepiece series: Masuyama
  • Apparent field of view: 52°
  • Focal length (mm): 80mm
2195.00 € 2090.00 €
Estimated delivery time : 1-4 weeks
 
 

The SmartEye seamlessly combines the traditional joy of visual eyepiece observation with the unparalleled light-gathering capabilities of state-of-the-art sensor technology. This dual-purpose device serves as both an electronic eyepiece and a cooled CMOS camera compatible with ASCOM Alpaca.

Technical details:

  • M54 thread compatible with standard 2-inch nosepiece adapter (included).
  • Sony IMX533 Color CMOS sensor, offering high-resolution imaging capabilities.
  • Thermoelectric Cooling (TEC) unit, achieving cooling down to 30°C below ambient temperature.
  • Ultra High Definition Display for crisp and clear visualization of objects.
  • Wide 90° field of view, providing expansive coverage for detailed observation.
  • Diopter adjustment range from +1D to -5D, catering to various visual acuity needs.
  • Dual-band WiFi support (2.4 GHz and 5 GHz 802.11 b/g/n/ac).
  • Bluetooth 5 with Bluetooth Low Energy (BLE) support.
  • Integrated SD Card Reader for convenient local storage of captured images.
  • USB-C Power-in port for versatile power supply options.
1949.00 €
Estimated delivery time : 3-4 days
 
 

With a true 76° field of view, it immerses you in the universe without having to roll your eyes. Even with fastest optics, you will enjoy tack sharp stars close to the outer edge of the field.

  • six focal lengths: 4.5 mm, 6.5 mm, 9 mm, 12.5 mm, 14 mm, 17.5 mm
  • 76° apparent field of view
  • sharp and contrasty in the center
  • very sharp at the edge, even with the fastest telescopes
  • long eye relief, foldable eyecups - suitable for eyeglass wearers
  • low distortion
  • no kidney bean effekt
  • reduced weight, minimized size - well suited for binoviewing
  • barrel size 1.25" and 2", slip-protected
  • not parfocal to the other Morpheus eyepieces
  • phosphorescent engraving
  • photo-video adaptation via M43 thread
1630.00 €
Estimated delivery time : 1-4 days
 
 
The Ethos 21mm with 100° apparent field of view.
1390.00 €
Estimated delivery time : 1-4 days
 
 
Perfectly made 102°  12.5 mm hyper wide eyepiece with additional EiC extender.
1495.00 € 1350.00 €
Estimated delivery time : 1-2 days
 
 
Perfectly made 102°  17 mm hyper wide eyepiece with additional EiC extender.
1495.00 € 1350.00 €
Estimated delivery time : 1-2 days
 
 
The Ethos 17mm with 100° apparent field of view.
1190.00 €
Estimated delivery time : 1-4 days
 
 
The NOBLEX® ultra-wide-angle anastigmatic eyepiece is characterised by its outstanding optical performance.
1299.00 € 1188.81 €
Estimated delivery time : 1-2 days
 
 
The ultimate 120° 9 mm Giant Field Eyepiece made by Explore Scientific!
1149.00 €
Estimated delivery time : 1-2 days
 
 
Baader Hyperion eyepiece set - 7 wide-angle eyepieces in a noble case
  • Seven high-quality wide-angle eyepieces in a set
  • noble and stable case
  • Focal length composition according to your wishes
1075.00 €
Estimated delivery time : 1-4 days
 
 
The Ethos 13 mm has a combined socket for 1.25 and 2 inch.
999.00 €
Estimated delivery time : 1-4 days
 
 
The Ethos 10 mm has a combined socket for 1.25 and 2 inch. Due to the slim design the 10 mm Ethos is also binocular suitable.
999.00 €
Estimated delivery time : 1-4 days
 
 
TeleVue sets new standards with the new 4.7 mm Ethos .... 110 ° apparent field of view.
999.00 €
Estimated delivery time : 1-4 days
 
 
 TeleVue sets new standards .... 110 ° apparent field of view.
998.00 €
Estimated delivery time : 1-4 weeks
 
 
KOWA EXTREME WIDE ANGLE XD- OKULAR 9 mm with 80 degree field of view and 2inch Adapter.
  • 80° field of view allows relaxed observations and a large field of view for overview.
  • Extemely high edge sharpness due to Field Flattener lenses and high quality XD lenses provide an image free of chromatic aberration
  • Ideal for digiscoping - large field of view minimizes vignetting even with large camera sensors or wide-angle smartphone lenses
  • eye relief : 17 mm
  • Eyepiece focal length through the 1.6 x extender 8.75 mm
  • 2" telescope adapter with48 mm filter thread
  • Focus position with reference Tele Vue 41 mm panoptic : 16 mm inwards
  • Eyeglass wearer friendly
  • 2 " plug adapter with M 48 filter thread
  • Waterproof
  • 10 years warrenty
995.00 €
Estimated delivery time : 3-4 days
 
 
KOWA EXTREME WIDE ANGLE XD- OKULAR 9 mm with 80 degree field of view and 1.25inch Adapter.
  • 80° field of view allows relaxed observations and a large field of view for overview.
  • Extemely high edge sharpness due to Field Flattener lenses and high quality XD lenses provide an image free of chromatic aberration
  • Ideal for digiscoping - large field of view minimizes vignetting even with large camera sensors or wide-angle smartphone lenses
  • eye relief : 17 mm
  • Eyepiece focal length through the 1.6 x extender 8.75 mm
  • 2" telescope adapter with48 mm filter thread
  • Focus position with reference Tele Vue 41 mm panoptic : 26 mm inwards
  • Eyeglass wearer friendly
  • 2 " plug adapter with 28.5mm filter thread
  • Waterproof
  • 10 years warrenty
995.00 €
Estimated delivery time : 3-4 days
 
 
The new gigantic 3" 30 mm Explore Scientific Eyepiece.
1099.00 € 989.00 €
Estimated delivery time : 1-4 days
 
 
The 6 mm is the fourth eyepiece in the Ethos series with a fabulous 100° apparent field of view. 
969.00 €
Estimated delivery time : 1-4 days
 
 
The type 5 eyepieces with 20, 26 and 31 mm are ideal for short focal length Newtonian telescopes, even on the 20" f/4 stars are absolutely point-like almost to the edge.
967.00 €
Estimated delivery time : 1-4 weeks
 
 
899.00 €
Estimated delivery time : 1-4 days
 
 
High quality widefield zoom eyepieces for astronomy with adjustable eyeguard with 2" adapter and M48 filterthread.
899.00 €
Estimated delivery time : 3-4 days
 
 
High quality widefield zoom eyepieces for astronomy with adjustable eyeguard with 2" adapter and T2 Thread.
899.00 €
Estimated delivery time : 3-4 days
 
 
High quality widefield zoom eyepieces for astronomy with adjustable eyeguard with 1.25" adapter and Filterthread.
899.00 €
Estimated delivery time : 3-4 days
 
 
25 mm Ultra Wide Angle Eyepiece with 100° and 2" Socket.
899.00 €
Estimated delivery time : 1-4 days
 
 
The 8 mm is the second eyepiece in the Ethos range with a fabulous 100° apparent field of view.
879.00 €
Estimated delivery time : 1-4 days
 
 
High quality widefield zoom eyepieces for nature observing with adjustable eyeguard.
850.00 €
Estimated delivery time : 3-4 days
 
 
A convincingly good eyepiece for instruments with f/5 aperture ratio

795.00 €
Estimated delivery time : 1-4 weeks
 
 

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
799.00 € 745.00 €
Estimated delivery time : 1-4 days
 
 
This high quality Swarowski 25 - 50 x Zoom Eyepiece you can get now with a 2\" barrel for your telescope.
690.00 €
Estimated delivery time : 1-2 days
 
 
The Nagler zoom offers the best possible imaging quality and keeps up with the best planetary eyepieces in direct comparison. And compared to the Ortho's it offers four focal lengths, a wider field of view and a much more comfortable viewing experience.
679.00 €
Estimated delivery time : 2-3 days
 
 
New APM Super Zoom eyepiece with TMB Barlow Lens

Characteristics:

  • Wide field of view
  • Excellent mechanical and optical quality, very good haptics
  • Very good viewing position
  • Universally usable, both terrestrial and astronomical observation
  • Also usable on fast optics
  • Clickstop 8 Clicks : 7,7-8-9-10-11-12-13-14-15,4
  • Clickstop 8 Clicks with TMB Barlow : 5-5,3-6-6,6-7,2-7,9-8,6-9,2-10
  • 2 upper external threads for connection of Tele Vue Dioptrix or adapter M43 x 0.75 and M37 x 0.75
  • 1.25" and 2"  barrel with 1.25" filter thread
  • apparent field at 7.7mm ( 5.0 mm )  it is  67° and at 15.4 ( 10.0 mm ) mm it is 66°
678.00 €
Estimated delivery time : 1-2 days (as from Availability)
Availability acc. to manufacturer :
Jun 29 2025
Tele Vue - 35 mm Panoptik Okular
650.00 €
Estimated delivery time : 1-4 days
 
 
These eyepieces with their huge apparent field of view not only gave the observer a panoramic visual experience, but they relax the eye so the observer ...
649.00 €
Estimated delivery time : 1-2 days
 
 
Excellent coatings ensure a transmission of over 99% across the entire visual spectrum. The lens edges are naturally matt blackened.

  • 4-lens Plössl type with ED lenses
  • Extremely low chromatic aberration
  • 48° field of view
  • Extremely sharp image
  • Transmission >99%
719.00 € 647.00 €
Estimated delivery time : 1-2 days
 
 

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
689.00 € 645.00 €
Estimated delivery time : 1-4 days
 
 

Eyepiece set with all seven Hyperion focal lengths (5, 10, 17, 24 mm), incl. Eyepiece case.

  • This eyepiece set includes all the focal lengths you ever will need for observing or eyepiece projection.
  • Comfortable eye relief of 20 mm - through rubber eyecup also perfect for spectacle wearers.
  • Phantom Group Coating in ZEISS quality for absolute absence of reflections and maximum contrast.
  • Excellent sharpness to the edge even with fast telescopes and spotting scopes through optimized 8-element design.
  • 1.25" and 2" barrel size with filter threads.
  • Variation of the magnification possible by using fine tuning rings.
  • Camera thread at the top side for connecting DSLR and mirrorless system cameras for eyepiece projection.
  • Eyepiece case for save transport included
635.00 €
Estimated delivery time : 1-4 days
 
 
KOWA EXTREME WIDE ANGLE XD- OKULAR 14 mm with 80 degree field of view and 2inch Adapter.
  • 80° field of view allows relaxed observations and a large field of view for overview.
  • Extemely high edge sharpness due to Field Flattener lenses and high quality XD lenses provide an image free of chromatic aberration
  • Ideal for digiscoping - large field of view minimizes vignetting even with large camera sensors or wide-angle smartphone lenses
  • eye relief : 17 mm
  • Eyepiece focal length 14 mm
  • 2" telescope adapter with48 mm filter thread
  • Focus position with reference Tele Vue 41 mm panoptic : 10 mm inwards
  • Eyeglass wearer friendly
  • 2 " plug adapter with M 48 filter thread
  • Waterproof
  • 10 years warrenty
629.00 €
Estimated delivery time : 3-4 days
 
 
590.00 €
Estimated delivery time : 1-4 weeks
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 1-4 days
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 1-4 weeks
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 2-3 days
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 2-3 days
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 1-4 days
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 1-4 days
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 1-4 days
 
 
New series of eyepieces with comfortable 20 mm eye relief and adjustable eyeguard
590.00 €
Estimated delivery time : 2-3 days
 
 
Swarovski 20-60x zoom eyepiece
580.00 €
Estimated delivery time : 1-2 days
 
 

APM Super Zoom eyepiece with APM comacorrecting barlow.

Features:

  • Wide focal length range between 7.7 and 15.4mm (with APM Barlow 4mm to 8.1mm)
  • Wide angle field of view
  • High quality, multicoated optics
  • Sophisticated optical-mechanical design
  • Modern MC multicoating
  • Optimized, comfortable viewing behavior
  • Blackened lens edges
  • Click stop 8 clicks : 7.7-8-9-10-11-12-13-14-15.4
  • Click stop 8 clicks with APM Barlow : 4-4,2-4,8-5,3-5,8-6,3-6,9-7,4-7,9-8,1
  • 2 upper external threads for connection of Tele Vue Dioptrix or adapter M43 x 0.75 and M37 x 0.75
    plug diameter 1.25" with filter thread, as well as 2" plug
  • apparent field at 7.7 ( 5.0 mm ) mm 67° and at 15.4 ( 10.0 mm ) mm 66°.

 

554.00 €
Estimated delivery time : 1-2 days (as from Availability)
Availability acc. to manufacturer :
Jun 29 2025