Doesn't it depend on the particular response curve of the chip you are using? Some are much less blue sensitive than others, IIRC. Joe and Patrick, by "clear", I assume you are referring to the luminance exposure? And isn't an IR blocking filter typically used for this exposure? I've been kind of wowed by the "tricolor" images I've seen lately that use narrowband filters in place of color filters. I'm sure the exposures are much, much longer due to the vastly decreased throughput, but the resulting images are striking, as well as having some scientific value. On Sat, Apr 26, 2008 at 12:17 AM, Joe Bauman <josephmbauman@yahoo.com> wrote:
Hi Patrick, I'm probably not much help because I'm still learning. But I generally shoot the same exposure for each of the three colors. Then I think the clear should be longer, maybe three times the exposure for the others. The best way to get an idea is to look in S&T and find one of the amateur views, and the caption will list the exposure times. Good luck, Joe
PS: What are you shooting?
Patrick Wiggins <paw@wirelessbeehive.com> wrote: To those here that shoot tri-color CCD images:
Is there a rule of thumb for how much time to be spent imaging through each filter (red, green, blue, clear)?
patrick
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