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Post by Deleted on Feb 13, 2014 22:41:36 GMT
I have a Baader UV/IR Cut/L filter for my SBC2000. Unfortunately, I can't remember why I bought it or what it is supposed to do. I was away from astronomy for a couple of years and have forgotten what little I learned while I was involved with it. I do remember that I removed the IR filter in the Sammy but I don't know why I ordered another IR filter to screw on to the nose piece. I use this camera with my Nexstar 6SE to view from my back yard (yellow Bortle zone). Any info will be appreciated.
Kim
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Post by davy on Feb 13, 2014 22:46:25 GMT
hi kim...skipping techno jargon,( I leave that to the others lol) the built in factory ir filter is of poor quality and to a different spec to the one you screw on the nose cone,
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Post by Deleted on Feb 13, 2014 22:51:17 GMT
The IR Cut blocks IR light. The reason you want to block it is, IR light focuses differently then the visible spectrum. This causes star bloating and blurry images. The reason we remove them one from the Sammy is, The stock filter blocks some of the desirable HA range (which isn't an issue for security cams but is for astronomy). We then replace it with a more suitable IR filter that passes HA yet blocks the bad parts of the IR/UV range.
Absent of an IR cut also causes white balance issues.
My sammy operates without a IR filter at all, but it would benefit from a astro friendly one.
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Post by Deleted on Feb 13, 2014 22:55:37 GMT
Thanks for the quick replies guys. I'll screw the filter back on my Sammy. Are there any situations where I should remove the Baader, like when viewing the moon or planets?
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Post by Deleted on Feb 13, 2014 23:06:31 GMT
Thanks for the quick replies guys. I'll screw the filter back on my Sammy. Are there any situations where I should remove the Baader, like when viewing the moon or planets? I can not think of anything? but I'm no expert. Many use mallincams with no filters at all, so not 100% why that is the case. I think it has to do with IR/UV sources of light, such as light pollution and the moon. I guess if you have perfect skies you may not need one. They seem to tighten up stars IMO
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Post by davy on Feb 13, 2014 23:07:38 GMT
I have removed my astro filter and to be honest don't miss it with what I have looked at so far...the moon I would try a moon filter for cutting down the glare will give better seeing.
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Post by johnno on Feb 13, 2014 23:46:03 GMT
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Post by Deleted on Feb 14, 2014 1:11:12 GMT
Thanks johnno. I read that link (and will re-read it). It was very informative. Seems like the plusses of using my Baader UV/IR Cut filter outweigh any minuses, even though I'm using an SCT.
Kim
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Post by Deleted on Feb 14, 2014 1:42:46 GMT
Thanks johnno. I read that link (and will re-read it). It was very informative. Seems like the plusses of using my Baader UV/IR Cut filter outweigh any minuses, even though I'm using an SCT.
Kim
Plus you keep dust bunnies off your sensor
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Post by Dragon Man on Feb 14, 2014 12:47:00 GMT
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Post by Deleted on Feb 14, 2014 13:29:34 GMT
Hi Kim sounds like you have a very similar if not the exact same filter as me...Baader neodymium filter (ir cut / sky glow) I find it works great from my very light polluted garden. It NEVER comes off my camera. As the guys said above... prob the only time you wouldnt want it would be under insanely dark skies. Heres a comparison using the sammy with and with out the neodymium filter. astrovideoforum.proboards.com/thread/58/baader-neodymium-filter(ignore the first comparison pics...i was having a blonde day )
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