Search query: 90 degree eyepiece

Product: SVBONY Telescope Eyepiece FMC Broadband Green Film Telescope Accessory 1.25 68 Degree Ultra Wide Angle Eyepiece Set for Astronomical Telescope(6mm 9mm 15mm 20mm)
Brand: SVBONY
Relevance: Substitute
SVBONY 68 degree ultra wide long eye relief eyepiece with a comfortable wide field for planetary observing

Super wide 68 degree apparent field offers expansive views of the moon;star clusters;and the Milky Way

It helps gets sharpness;high contrast and orthoscopic images;it can be used in any astronomical telescopes that fits for standard 1.25" eyepieces

68 degree ultra wide FOV:
Comfortable ultra-wide field that naturally more poerful to get bright and sharp viewing

Fully multi coated lens:
High quality observation without introducing additional chromatic aberration;make image more sharper

Broadband green film optical glass:
Chromatic corrected;high transmittance to achive clear and sharp viewing

6/9/15/20mm eyepiece set:
Low;medium and high powered magnification for a wide range of viewing;enhance the visual experience

Optical structure design:
Multi-element design;highly achromatic;it delivers sharp images and enhance the details of planetary filters,Soft rubber eye guard
Fold down soft rubber eye guard is more comfortable for eyeglass wearers

Specifications::
Structure design: 5-elements in 3 groups (6mm)
6-elements in 4 groups (9mm)
4-elements in 3 groups (15mm)
5-elements in 3 groups (20mm)
Eyepiece series:68 degree ultra wide eyepiece
Focal length:6mm/9mm/15mm/20mm
Barrel size:1.25"/31.7mm
Eye relief:17mm
Apparent field of view:68 degree
Lens material:optical glass lenses
Body material:fully metal
Filter threads:standard 1.25" filter thread

Package includes:
1xSVBONY 1.25" ultra wide 6mm eyepiece
1xSVBONY 1.25" ultra wide 9mm eyepiece
1xSVBONY 1.25" ultra wide 15mm eyepiece
1xSVBONY 1.25" ultra wide 20mm eyepiece
Super wide 68 degree apparent field of view;gets broad field observations for amazing observing experience
Fully multi coated lens;broadband green film optical glass increases light permeability for sharp images
Multi-element design delivers sharp images;highly achromatic with good color correction and contrast
Black anodized aluminum housings;internally blackened to eliminate light scattering and contrast
Fold down soft rubber eye guard;block stray light also bring the convenience to eyeglass wearers;It's a great Halloween birthday christmas gift