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I concure that the edge sharpness of the Canon IS binoculars is simply one of the best--no matter how they are used!

Best regards,
Dave.

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I love mine. The optics are superb, the 'IS' system works as advertised and the sharpness to the edge is right on the money. ...

Rickster

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I owned (and still own some) several good ''high powered'' binos already - Fujinon 16x70, Zeiss 15x60 (Older classic) Takahashi 22x60mm - Nikon 18x70mm- and now I got a 15x50 IS - I can tell you (forgiven here the IS feature I am talking just about their optical quality) these 15x50's from Canon really rock...the optical quality regarding sharpness and border performance it's just incredible - stars remain sharp almost at the very very extreme edge also the color correction(CA or color fringing) is very good-you need to look for it to find some... very very minimal - these are the best among those you asked for (it's lighter, deliver a very good AFOV of 65º, a good eye-relief, excellent optical correction, and many things more) so I can tell you these binoculars are optically awesome and you get as a bonus their IS system…
If you are thinking about the optical quality (IS or Non IS) these are very good - for me a truly premium.

regards Pedro

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Okay, thanks guys. I'm starting to get the impression that the 15x50IS optics are on par with that of the Fujinon 16x70s. If one were to compare the two, would this be a fair summary?

Sharpness--pretty close
Contrast--pretty close?
Edge performance--pretty close
TFOV--edge to the canon (4.5* vs 4.0)
Limiting magnitude reach--I am guessing the fujis win (70mm vs 50mm objectives)
Weight--canons are much lighter
Eye relief--canons are more amenable to eyeglass wearers
Daytime use--canons win due to center focus
Hand-held Stability--duh, the canons
Price--fujinons win, being about $250-300 less ($600-700 vs $850-1000)

I know that these factors have different weights for different people, but since it is not possible for me to try each to compare before deciding, I am just trying to weigh the pros and cons of each. Are there other considerable differences? I had originally thought these were closer in price; if I go for the canons, I'll need to keep saving.

Sorry if I am hijacking this thread. I guess it was originally about problems with the IS degrading the view. At least it is still related to qualities of the 15x50IS.

--Tad

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Orion XT8i, Vixen ED80Sf, Oberwerk BT-80/45
20x80 Oberwerk Std., 12x50 Nikon AE,
10x42 Celestron Regal LX, 8x40 Pentax PCF WP

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