Sky-Watcher 90 Degree Erect Image Diagonal 1.25"

A great accessory for daytime terrestrial viewing with your telescope 

Suitable for Refractor & Cassegrains  Maksutov & Schmidt-Cassegrain Telescopes

Great Accessory for Daytime Terrestrial Viewing with Telescope 

Fully Coated Optics

This 1.25” diagonal produces right side up and left-to-right correct images when used with refractors and catadioptric (Schmidt-Cassegrain) telescopes 

Inserts into 1.25” focusers or visual backs; accepts standard 1.25” eyepieces Description

Sky-Watcher 1.25″ Erect Image Diagonals

Most of the telescopes work perfectly well during daytime as well as for astronomy. If you have a refractor or a Schmidt-Cassegrain telescope and you want to use it for terrestrial observations, Sky-Watcher Erect Image Diagonals are the most useful accessory you can buy.

Normally, the image created through the telescopes may be either upside down, flipped so that you see a mirror image, or a combination of the two. It will be very confusing when you are trying to track a moving boat or flying bird. This problem can be corrected easily by using a  erect image diagonal

Simply remove the standard diagonal from the telescope’s focuser or visual back, and install the Sky-Watcher Erect Image Diagonal, then when you insert an eyepiece, objects will be right side up and left-to-right correct. These Amici prism diagonals are very comfortable for daytime observations, where the telescope is often in a horizontal position.

Please Note:  Adding an erect-image diagonal to a Newtonian reflector will not result in images that are right side up and left-to-right correct. The optical design of a Newtonian will always produce images that are rotationally off in orientation. This does not mean that you can’t use a Newtonian reflector during the day, it just means that you have to get used to objects oriented in unrealistic positions.

All Sky-Watcher products have a  5 year manufacturer warranty (not transferable).