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3 of 4 people found the following review helpful:
3.0 out of 5 stars A bit disappointed., July 22, 2009
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The Eye "<O>" (Northern Hemisphere) - See all my reviews
= Durability:3.0 out of 5 stars  = Fun:3.0 out of 5 stars  = Educational:4.0 out of 5 stars 
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This review is from: Celestron Diagonal, Erect Image (Electronics)
I am a novice astronomer and bird watcher and the owner of a 6" Newtonian reflector telescope. I thought -- ignorant as I am about optics -- that this erect image diagonal would allow me to view both the moon and my local cardinals right-side up. Wrong! It turns out that when I use the diagonal the focal range of my scope becomes so restricted that its usefulness as an instrument of observation drops to nearly nada. I can see remarkable right-side-up detail at about 50 meters (or perhaps a bit more), but everything before and after this "window" is completely lost. To be fair, I am not yet an expert in combining optics so my setup may be the problem and not the diagonal.

I've placed the diagonal back in the box it came in (for now). Maybe I'll have use for it in the future (perhaps I can bait birds into the focal range of the scope). If you are new to telescopes I would caution you against buying things that look like they ought to work. It's better to talk to someone with experience who can tell you what will work with your equipment. Back to the drawing board for me.
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Celestron Diagonal, Erect Image
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