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Mercury transit begins in little over an hour... for those who have the sun up :)
#11
RE: Mercury transit begins in little over an hour... for those who have the sun up :)
(May 9, 2016 at 9:59 am)pocaracas Wrote:
(May 9, 2016 at 9:54 am)Cthulhu Dreaming Wrote: @Alex

What sort of filter did you use for that?

A green one. Tongue

Pretty much Big Grin

It's a broadband filter which cuts off long and short wavelengths in order to reduce chromatic errors in fast and not superexpensive refractors. It's basically a band pass.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition

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RE: Mercury transit begins in little over an hour... for those who have the sun up :) - by Alex K - May 9, 2016 at 10:03 am

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