blinky Posted May 14, 2009 Share Posted May 14, 2009 Folks, I have a set of QHY LRGB filters - the ones Modern Astronomy sell. Well I have sombidy interested in buying them but he is asking if they are IR Blocking? As they are LRGB I would assume they are for imaging as thus are IR blocking, but does anybody know for sure? Link to comment Share on other sites More sharing options...
jcm Posted May 14, 2009 Share Posted May 14, 2009 I believe they are not IR/UV blocking. JohnPS Bern would know but his site does not say.PPS Might be a few days before you can get in touch with him. Link to comment Share on other sites More sharing options...
steve51450 Posted May 14, 2009 Share Posted May 14, 2009 hithey are not ir blocking, so the ir filter has to sit in front of the rgb when colour imaging so it has to do 2 jobsluminance imaging as well as making the colour filters ir blockingsteve Link to comment Share on other sites More sharing options...
blinky Posted May 14, 2009 Author Share Posted May 14, 2009 Hmm..... I just found this webpage, does it not indicate that they are IR blocking when you look at the spectrum response?CCD filter profiles - Lunático Astronomía Link to comment Share on other sites More sharing options...
steve51450 Posted May 14, 2009 Share Posted May 14, 2009 QHY RGB Filter 1 ¼" - Lunático Astronomíait also says they need a stacked ir filter Link to comment Share on other sites More sharing options...
blinky Posted May 14, 2009 Author Share Posted May 14, 2009 Ah... So it does! Many thanks Link to comment Share on other sites More sharing options...
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