Re: Albireo and judgment of relative color

Albireo should show the yellow and blue-green companion relative to each
other as being different.

Color is judged by our eyes in a relative mode. Some people have
great absolute color judgment but most of us do not have that blessing.

Along the lines of color judgements, here is a demonstration that shows
just how much our eyes use comparison to judge color. It is really a
good demonstration of how our brain fills in for color depending on what
the adjacent color may be.

http://blogs.discovermagazine.com/badastronomy/2009/06/24/the-blue-and-the-green

Enjoy,
Mark

Michelle Dick wrote:
> On Sat, Jun 27, 2009 at 6:31 AM, Greg Parker <gparker-tac@No-Spam
>
>> wrote:
>>
>
>
>> Alberio should show a distinct color difference. Try looking at it
>> a little bit out of focus - this smears the color over a broader area,
>> which makes it easier for your eye to detect.
>>
>
>
> Will do. And thinking on it, I may have only looked through this dob at
> Alberio. I'll check it out in others' and have a friend look through mine.
>
>
>
>> The 8" Orion is hard to beat on the price/performance/portability scale.
>> A new 8" Orion will have a superior focuser design, and might have
>> better movement just from the lack of wear and tear. Visit the Orion
>> store in Cupertino to push one around and see if it feels better.
>>
>> For more Orion mods and upgrades than you can shake a stick at:
>> http://tech.groups.yahoo.com/group/skyquest-telescopes/
>> http://www.scopestuff.com/ss_ldxx.htm
>>
>>
>
> thanks! That gives me some options. I did visit the Cupertino store (where
> I bought the dob and many accessories since) today. Mine has the old 1.25"
> focuser and the newer ones (at the store) are all 2". The dob is not mine,
> so I'm not sure how much I want to spend on non-removable upgrades (I'd have
> to drill a bigger hole for the focuser). I may offer to buy it off my
> friend. Or a new one is $330.
>
> Also, last year the store sold me a sun filter for the dob but I didn't try
> it until this year's GSSP. Didn't fit (too big). They sold me the wrong
> one. Today they exchanged it for the correct (and cheaper!) one and I got
> the change.
>
>
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>
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