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Meade 933 45 Degree Erecting Prism | 
| Brand: Meade
List Price: $74.92
Buy New: $47.94
You Save: $26.98 (36%)
New (4) from $47.94
Rating:  2 reviews
Media: Electronics
Shipping Weight (lbs): 0.3
Dimensions (in): 3.9 x 2.4 x 2.1
MPN: 933
Model: 933
UPC: 709942923216
EAN: 0709942923216
ASIN: B00004VUMI
Availability: Usually ships in 1-2 business days
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| Features:
| • | 45-degree prism | | • | For correct viewing orientation | | • | For terrestrial observing | | • | Threads to the rear cell | | • | Accepts any Meade eyepiece |
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| Editorial Reviews:
Product Description
#933 45 Erecting Prism: Typical of most astronomical telescopes, images throughthe ETX-60AT and ETX-70AT appear right-side-up but reversed left-for-right. For astronomical viewing this orientation is of no consequence. However, for terrestrial observing, where a fully correctly oriented image is desirable, the #933 45 Erecting Prism threads on to the telescope's rear cell and accepts an eyepiece of any focal length.
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.
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| Customer Reviews:
 Good for spotting use- but not for astronomy. December 10, 2000
Michael J Edelman (Huntington Woods, MI USA)
28 out of 31 found this review helpful
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 May 24, 2002
DH
14 out of 15 found this review helpful
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.
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