[big snip]
> Not unless you have a few waves of spherical aberration! Seriously, I know
> how
> the colour is burned out of stars by astrophotos. In the same way, a large
> telescope
> burns the colours out of stars like Albireo. A smaller scope always shows a
> more
> saturated colouring of the pair.
An old double-star observer's trick is to put the telescope
slightly out of focus. Makes Alberio *really* pretty! I always do
it when showing colored doubles.
-- Jim Van Nuland, San Jose (California) Astronomical Association