Product Description

ETX-60 and 70AT telescopes contain internal mirrors that reflect light to the telescope's astronomical observing position. In this position, the telescope's image is upright, but reversed left-to-right. This is of little consequence for astronomical viewing, but for terrestrial observing it is highly desirable to have a correctly oriented image. The #933 Erecting Prism delivers a fully corrected image and provides a convenient 45 observing angle for optimal terrestrial viewing.

Product Details

• Brand: Meade
• Model: 933
• Dimensions: .30 pounds

Features

• 45-degree prism
• For correct viewing orientation
• For terrestrial observing
• Threads to the rear cell
• Accepts any Meade eyepiece

Amazon.com Product Description
The Meade 933 45-degree erecting prism aids terrestrial observing where a correctly oriented image is desirable. It threads onto the telescope's rear cell and accepts an eyepiece of any focal length.

Customer Reviews

Good for spotting use- but not for astronomy.
Erecting prisms like this Meade unit are a great help for terrestrial use, but don't try to use it for astronomical viewing. The multiple reflecting surfaces in the prism result in multiple ghost images when trying to view stars and other dim astronomical objects. If you buy a Meade ETX with the idea of using it for nature viewing you'll find it handy.

Purely for terrestrial viewing
Only purchase the Meade 933, 45 Degree Erecting Prism if you want to use your ETX for terrestrial viewing. It doesn't really have a uselful astronomical application and tends only to diminish the quality of the object viewed in space. You don't necessarily need this for terrestrial viewing either unless you desire to see the object in its correct orientation, which is what this item is designed for. Does the job nicely in this respect. Recommended for terresrtrial viewing only.

quality accessory from mead
Quality Product.. Easy install m Enables you to use as spotting scope with true inverted image