31 of 33 people found the following review helpful
Great scope cont'd...,
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This review is from: Celestron 52250 80mm Ultima Zoom Spotting Scope (Electronics)
Humm, hit the tab key and my review in progress disappeared!
The scope has a very nice overall fit and finish with good deep coatings on all visible lens surfaces. The focus knob is silky smooth with no detectable backlash. The eyepiece eye-relief is ample (I don't require glasses when viewing--see below) and the zoom is smooth. An audible sliding sound is heard when zooming, but it isn't objectionable.
Speaking of glasses, if your glasses just correct for near or far sightedness, you don't really nead them at the scope; the focus range of the eyepiece will compensate for your correction without glasses. Those with astigmatism problems will need glasses however.
Owning a premium 80mm ED telescope, I was able to do a side-by-side test with it and this scope. Overall, the optical performance is impressive. Some chromatic abberation is present at the higher magnifications, but even then, it wasn't objectionable. At 60X the ED scope clearly edged out the 52250, with sharper fine detail and a slightly brighter image. To be fair though, the ED telescope had fewer air-to-glass surfaces and the eyepieces (10mm and 30mm) were fixed focal length so that is to be expected. I'd say the Celestron 52250 gave 95% of the performance of the high-priced ED scope. At 20X I was hard pressed to see a significant difference. At 40-60X the image didn't have the crisp detail of the ED scope, but it was quite usable. Most of my birding is done at lower magnification anyway, so I'm not loosing much.
On the moon, I was really impressed at an almost total lack of chromatic abberation! I could not see any "blue haze"--just a thin yellow edge. As a rough estimation of optical quality, I performed what is called a star test. In this test one looks at a star image inside and outside of focus. Frankly, I was very surprised by the test. I saw no optical defects and in fact, the patterns were text book perfect! It is amazing what can be done with computer generated optics these days.
This isn't a $1000 scope, but if you want 90% of the performance at a fraction of the money, this scope will work for you. I'd recommend it to a friend. At the %154 price I paid for it, this is a real value!