Star Diagonals
Astronomical observation usually requires the telescope to tilt up significantly, which can make straight-thru viewing awkward and uncomfortable. A diagonal solves this comfort problem by using a mirror to direct the light at a 90° angle toward the eyepiece. Explore Scientific has both 2-inch and 3-inch diagonals with dielectric-coated mirrors that are 99% reflective.
Filters
Filters
2 products
Explore Scientific
99% Reflective 2" Diagonal
Sale price$ 205.99
Explore Scientific
99% Reflective 3" Diagonal
Sale price$ 607.69
Free United States Shipping
Orders $70+ shipped within the continental United States qualify for free standard shipping. Learn more.
Explore Scientific Warranty
Register your product within 60 days to activate your warranty coverage. Learn more.
30 Day Returns
Returns are accepted within 30 days if the item is in original condition. Learn more.
Dedicated Customer Support
Our customer service team is here to help with product support and warranty service. Learn more.
















