Optical Accessories

Provides a comfortable 90° viewing angle Inserts into any 1.25" telescope focuser or visual back Accepts standard 1.25" eyepieces Corrects image o...

Engage both eyes for more comfortable, detailed, and higher-contrast celestial views High-quality BAK-4 prisms with a 22mm clear aperture prevent ...

Selectively blocks mercury vapor, sodium vapor, and natural sky glow Achieves over 97% transmission of critical nebula emission lines Features a m...

Selectively blocks light pollution from mercury and sodium vapor lights Achieves over 97% light transmission for maximum brightness 60nm bandpass ...

10mm Focal Length for High-Power Views 60° Apparent Field of View Flat-Field Optical Design for Edge-to-Edge Sharpness 16mm Eye Relief for Comfort...

65° Apparent Field of View 15mm Focal Length for higher-power magnification Flat-field design for sharp stars edge-to-edge 16mm eye relief for com...

18mm Focal Length 65° Apparent Field of View Flat-Field 8-Element Optical Design 20mm Long Eye Relief Parfocal with other Ultima Edge Eyepieces Ac...

24mm Focal Length in a 1.25" Barrel 65° Apparent Field of View Flat-Field 8-Element Optical Design 29mm of Eye Relief for Eyeglass Wearers Threade...

30mm focal length provides low-power, wide true-field views 70° apparent field of view frames large celestial objects Flat-field optical design en...

Adjustable light transmission from 1% to 40% Standard 1.25” filter format fits most eyepieces Reduces brightness without altering an object's natu...

12mm Focal Length for Medium-High Magnification 60° Apparent Field of View Comfortable 16mm Eye Relief 6-Element Fully Multi-Coated Optics Parfoca...

18mm Focal Length 60° Apparent Field of View 6-Element Fully Multi-Coated Optics 16mm Eye Relief Parfocal with all X-Cel LX Eyepieces 1.25" Barrel...

2.3mm focal length for maximum planetary magnification 60° apparent field of view frames celestial targets 6-element fully multi-coated optical de...

60° Apparent Field of View 6-Element Fully Multi-Coated Optics 16mm of Comfortable Eye Relief Parfocal with all X-Cel LX Eyepieces 1.25" Barrel wi...

Doubles the magnification of any 1.25" eyepiece 3-element apochromatic optics for color-accurate, high-contrast views Fully multi-coated lenses ma...

Triples the magnification of any 1.25" eyepiece 3-element apochromatic optics for superior color correction Fully multi-coated for maximum image c...

5mm Focal Length for High-Magnification Views 60° Apparent Field of View 6-Element Fully Multi-Coated Optics Extended 28mm Eye Relief Parfocal wit...

7mm Focal Length for High-Power Planetary and Double Star Observing 60° Apparent Field of View Frames Targets Comfortably 6-Element Fully Multi-Co...

9mm Focal Length for High-Power Planetary and Double Star Views 60° Apparent Field of View Frames Objects Comfortably 6-Element Fully Multi-Coated...

Blue photometric filter in UVBRI series Filters designed for use with CCD and for f/4.0 or slower No reflections leading to image distortions or ""...

Blue filter for color rendering with RGB set Filters designed for use with CCD and for f/4.0 or slower No reflections leading to image distortions ...

Filters designed for use with CCD and for f/4.0 or slower No reflections leading to image distortions or "back reflections" Transmitted wavefront ...

Green filter for color rendering with RGB set Filters designed for use with CCD and for f/4.0 or slower No reflections leading to image distortions...

H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter i...