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You can see the image upside down but left-right correct with 90 degree erecting prism while upright with 45 degree prism. Just simply insert the  erecting prism into 1.25'' focuser and enjoy the nature far away: see the birds, deer at the edge of the forest, the summit cross on a mountain or a cruise ship far away on the sea……


Fit for 1.25'' focuser stand and eyepiece.

Multi-coated BK-7 prism for superior image fidelity and clearity.

90 degree erecting prism images upside down but left-right corrected, and 45-degree images uprightly.

Work well with refractor, Cassegrain and catadioptric telescope but not recommended for reflector telescope.

With dust cover to keep the lens for crisp viewing and long time service.


Angle: 45°  / 90° (optional)   

Material: Plastic + Metal 

Size: 1.25inch

Weight: 74-88g / 2.6-3.1oz 

Package weight: 92-106g / 3.2-3.7oz

Package size: 10.5 * 7 * 5cm / 4.1 *2.7 *1.9in

Package list:

1 * Erecting Prism 

Filed under: Eyepieces & Accessories