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CESDewar
GorillAstronomer
Reged: 01/16/05
Posts: 1695
Loc: Morganton, GA, USA
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Re: New Canon 15x50 IS!!! Don't like em...
05/11/08 08:48 PM
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I have used my 18x50 Canons on a p-mount, but under those conditions, I rarely use the IS system. The reason for that is that the IS system does introduce some artifacts that reduce the acuity of the view. Now those artifacts are so minor compared with the artifacts caused by hand-holding, that it's a non-issue. But when mounted, that issue goes away, and under those conditions, I prefer to take advantage of the best optical views through these binoculars.
I also have a p-mount rated for 10lb. binoculars, so the light Canons allow me to use a very short counter-balance arm which reduces the shake-time considerably. It often works well with p-mounts to put more weight on the counter-balance arm - I prefer to put 10lbs close in on a short arm rather than have a 5lb weight out at full extension.
As others have noted, these binoculars would probably hold their own without the IS system - the optics are superb and in particular, they have the sharpest edges of any binoculars I own. The other night I had no difficulty seeing 3 stars in the Trapezium when tripod-mounted with the IS off, in spite of a very low altitude (it was still twilight, so the faintest D component was a no-show). I have on rare occasions managed to see the three components handheld with the IS engaged, but usually I can only tell that it's a multiple star system without enough convincing detail to be sure just how many stars are present.
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