· Get a Cloudy Nights T-Shirt · Submit a Review / Article    Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing Previous   Index   Next   Threaded   Pages: 1 antimorris sage Reged: 08/16/09 Posts: 245 Loc: San Antonio-ish, TX Another CLS filter thread ....       #3423046 - 11/01/09 01:47 AM Edit   Reply   Quote Quick Reply   Ok so after reading all the threads on here recently about them, I went ahead and ordered an Astronomik CLS filter. I got it in the other day and havent yet used it on imaging, but before I hook up my DSLR and all my gear I went to look through it visually, all the stars have a blue/green hue - is that normal? I dont want to waste my time with hours of imaging if everything is going to turn out looking like the Hulk. Is it just observing through the CLS that turns out like this or will my images do the same? -------------------- Anna CPC 800 XLT w/FeatherTouch micro-focuser Orion EON 80ED unmodded Nikon D40 Meade DSI II Pro with ATIK Filter Wheel & Outback Razorback Cooler --------------- Morris Astronomy My Astro Blog "sic itur ad astra" Post Extras:       Zoeff sage Reged: 06/10/09 Posts: 260 Loc: Haarlem, Netherlands Re: Another CLS filter thread .... [Re: antimorris]       #3423061 - 11/01/09 01:03 AM Edit   Reply   Quote Quick Reply   I get the same effects with my UHC filter, which is more or less the same as the CLS but for visual use. The reason for this is that there are large gaps in the visible spectrum when looking trough these filters, giving you the green/blue hues you describe. These gaps are where the emission lines for various man made lights are at. The parts that the filter does let trough are where the interesting emission lines are - these are the colors of the many nebula out there. This also means that for galaxies it might not be as useful, and completely pointless for daylight photography. -------------------- Telescopes: NexStar 8SE, 90ED f/5.5 doublet, Galileoscope Accessories: Hyperion 36mm, GSO 32mm, E-lux 25mm, Hyperion 8mm, DBK 41AU02.AS, 2x Barlow, 0.63x Focal Reducer, Solar Filter, UHC Filter My (astro-)photos can be found on flickr. Post Extras:       WarrenS scholastic sledgehammer Reged: 03/04/08 Posts: 895 Loc: Orange County New York Re: Another CLS filter thread .... [Re: antimorris]       #3423237 - 11/01/09 06:46 AM Edit   Reply   Quote Quick Reply   Anna, set a custom white balance in your camera with the CLS filter attached. Read the camera manual on how to do this, you only need to do this once and use it each time you use the filter. With raws you don't really need to do this but it does avoid the weird color effect when looking at the camera LCD and subs. -------------------- Warren Astro-Tech 127EDT Celestron Onyx 80ED Astro-Tech Field Flattener C8 (circa 1983 Orange Tube) Atlas EQ-G, Orion SSAG Canon 135mm F2.8 Canon 40D, Astronomik CLS clip filter Leica, Minolta binos Post Extras:       antimorris sage Reged: 08/16/09 Posts: 245 Loc: San Antonio-ish, TX Re: Another CLS filter thread .... [Re: WarrenS]       #3423777 - 11/01/09 01:12 PM Edit   Reply   Quote Quick Reply   Warren - Will do. I was more wondering if this was normal through the filter. I guess it is supposed to be used mainly for imaging and not visual observation then, which is fine. I just, for some reason, wasnt expecting everything to be that color when I looked through it, now I will know, will set the white balance and be good to go :-) -------------------- Anna CPC 800 XLT w/FeatherTouch micro-focuser Orion EON 80ED unmodded Nikon D40 Meade DSI II Pro with ATIK Filter Wheel & Outback Razorback Cooler --------------- Morris Astronomy My Astro Blog "sic itur ad astra" Post Extras:       Nils_Lars Post Laureate Reged: 01/04/08 Posts: 3447 Loc: Santa Cruz Mountains , CA Re: Another CLS filter thread .... [Re: antimorris]       #3423785 - 11/01/09 01:16 PM Edit   Reply   Quote Quick Reply   Ya totally normal , the CWB is easily applied in a program like DSS. -------------------- Erik Orion Atlas Self Hypertuned (EQMOD) Orion ED 80 Williams Optics VII reducer Celestron 8" SCT Orion Starshoot Autoguider PHD guide Canon 400D Hap Griffin Mod w/Baader filter Astronomik clip-in LP filter and 12nm Ha Stilleto CVF and Bahtinov mask Tamron 75-300mm&28-80mm lenses NexImage webcam http://www.flickr.com/photos/31986095@N05/ Post Extras:       s58y Postmaster Reged: 12/12/04 Posts: 5509 Loc: Eastern NY Re: Another CLS filter thread .... [Re: Nils_Lars]       #3423818 - 11/01/09 01:49 PM Edit   Reply   Quote Quick Reply   The CLS filter works quite well, and has much better (raw) color balance than an IDAS LPS filter, at least for a modded camera. Here are unprocessed shots taken under bright moonlight with the CLS and IDAS-LPS filters: CLS IDAS These filters work a lot better when the moon is not so bright, of course. -------------------- Hutech 30D, SBIG ST-402 autoguider SV80S, TV102iis Old camera lenses: 800mm f/5.6, 180mm f/3.4 AP900, Barndoor tracker http://www.pbase.com/s58y Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 16 registered and 8 anonymous users are browsing this forum. 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