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Old 29-11-2005, 07:32 PM
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davidpretorius
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Filter wheels help

http://www.astronomik.com/english/eng_rgbt2.html

lrgb...hmmmm there is an L in there as well, something about ir cut,

do you take 4 runs of avi's?????

do you put the "l" filter on with each colour????
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Old 29-11-2005, 08:18 PM
bird (Anthony Wesley)
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Strictly speaking, you ought to take 4 runs, one "straight" with no filter at all, and then one for each of the 3 filters. The first one, i.e. with no filters, gives you Luminance, and the other three runs give you the colours.

In practice I never bother with the L run, but it's possible that you can get a lower noise result if you did.

Bird
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Old 29-11-2005, 08:25 PM
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davidpretorius
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thanks bird,

so L run has basically the same ir/uv blocking as the three colour filters but no colour!

also where does bintel show the manual colour wheels?
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Old 29-11-2005, 09:54 PM
bird (Anthony Wesley)
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Umm, good question...glad you asked...looking...looking... nope, can't see them. Maybe they don't sell them after all? You could try ringing them and ask - maybe they can put you onto someone?

Bird
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