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Old 03-10-2009, 03:52 PM
TheDecepticon
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UV/IR Filters

Do UV/IR filters block incoming Ha signals to the imaging chip? Where do I find decent graphs of different wavelengths of filters etc, that are reputable?
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Old 03-10-2009, 04:31 PM
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DavidU (Dave)
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Here you go.........
http://www.astrosurf.com/buil/filter...er%20Neodymium
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Old 03-10-2009, 04:48 PM
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Merlin66 (Ken)
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The "normal" UV-IR cut off filters (Baader etc) have a definate transmission between 400nm and 700nm. Let's maximum amount of Ha etc through without the problems if IR halo's.
Unfortunately the 400nm cut-off doesn't allow UV imaging ( spectroscope) of the H&K Ca lines.....
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Old 03-10-2009, 07:45 PM
TheDecepticon
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Thanks guys!
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Old 03-10-2009, 07:59 PM
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Quote:
Originally Posted by TheDecepticon View Post
Do UV/IR filters block incoming Ha signals to the imaging chip? Where do I find decent graphs of different wavelengths of filters etc, that are reputable?
I never used the UV/IR with the Ha filter. Stars don't really bloat in Ha so I wouldn't worry about it. Oiii is another matter though.
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