Celestron 1.25″ Erect Image 45 Degree Diagonal Eyepiece

Most telescopes, including refractors and catadioptric models such as the widely favoured Schmidt-Cassegrain, perform admirably for daytime viewing in addition to their astronomical applications. For those keen on terrestrial observations, an erect-image diagonal proves to be an invaluable accessory worth investing in.

If you look through your telescope with the standard mirror or star diagonal installed, you will notice that objects may be either upside down, flipped so that you see a mirror image, or a combination of the two. This is fine for observations of celestial objects, but it can be a little confusing when you are trying to track a boat as it moves through the water, or an eagle as he flies towards his perch.

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.

Top Three Features: Celestron 45-Degree Erect Image Diagonal

• Corrects image orientation for terrestrial observations: This feature allows you to view terrestrial objects in their natural orientation, making it easier to track moving objects such as boats or birds. It’s particularly useful for those who use their telescopes for both astronomical and terrestrial viewing.
• Easy to install: The Celestron 45-Degree Erect Image Diagonal is designed to be user-friendly, making it easy to switch from a standard diagonal for night-time viewing to an erect-image diagonal for daytime use. This feature ensures you can make the most of your telescope’s capabilities without any hassle.
• Comfortable 45° angle for daytime observations: The 45° angle of this Amici prism diagonal is designed for comfort during daytime observations, where the telescope is often in a horizontal position. This feature enhances your viewing experience, making it more enjoyable and less tiring.