Telescope Reviews: Re: Chromatic Aberration on planetary disks

Good post, Ed. Given that CA is really only a problem on about 5 or so nightsky objects, I don't much worry about it for astro use. Where CA becomes a more noticeable problem is for terrestrial use where in the worst cases it can cause image blurring and lack of detail transmission.

Also, given that most typical fixed eyepiece binoculars aren't capable of the level of magnification needed to make planetary viewing worthwhile, I think the issue of CA is often overblown with most binoculars. However, it can be one useful means of comparing two binoculars. By and large, I feel like if planetary viewing is important to the observer, a telescope is a much better tool. But what amazes me is the level of overall performance that one can get from even very reasonably priced binoculars.

Mike Swaim

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18" Starsplitter II f/4.5
8" Hardin Dob f/6
C5 workhorse mini SCT f/10 or f/6.3
70mm TV Ranger dual purpose birding/astro
77mm Leica Televid APO
16x70 Fujinons on UA Deluxe Mt.
12x50 Nikon SE
8x30 Nikon E2s
and many others

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