· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums 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] 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 bouffetout professor emeritus Reged: 11/21/12 Loc: Canada Modified Canon white balance !       #5560839 - 12/08/12 12:50 PM Edit   Reply   Quote Quick Reply   When I take my astrophotos with the Canon T3 the whit balance is set on the sun icon ,that's what I was told to do. Now that my T3 is modified ,do I take a photo of a white sheet on that icon or I make a custom one ? All I have to do for white balance is take a photo of an equaly lite white sheet? I don't have to play with the histogram ? Thank you ! Maxx Post Extras:       Footbag Carpal Tunnel Reged: 04/13/09 Loc: Scranton, PA Re: Modified Canon white balance ! [Re: bouffetout]       #5560961 - 12/08/12 02:21 PM Edit   Reply   Quote Quick Reply   I shoot in RAW and use Deep Sky Stacker to process, so white balance is irrelevant in my case because it is ignored. I then correct color in post processing. If your stacking software doesn't ignore it or you are shooting JPG's, then you could take a picture of a true white sheet of paper on a sunny day. Then use that as a custom white balance. Post Extras:       bouffetout professor emeritus Reged: 11/21/12 Loc: Canada Re: Modified Canon white balance ! [Re: Footbag]       #5561012 - 12/08/12 02:54 PM Edit   Reply   Quote Quick Reply   I shoot in RAW and process in Deep Sky Stacker too ,so I don't need a white balance ,work will be done in processing. That's simple enough Thank you dude ! Maxx Post Extras:       waassaabee Post Laureate Reged: 11/26/07 Loc: Central California Coast Re: Modified Canon white balance ! [Re: bouffetout]       #5561340 - 12/08/12 06:58 PM Edit   Reply   Quote Quick Reply   I've always used a Custom White Balance as it makes the color balance a lot simpler in post process. Post Extras:       bouffetout professor emeritus Reged: 11/21/12 Loc: Canada Re: Modified Canon white balance ! [Re: waassaabee]       #5561357 - 12/08/12 07:09 PM Edit   Reply   Quote Quick Reply   Thank you my friend ! The opinions seems to vary a lot on that topic from what I read in other forums...I guess I will have to test the two ways ! Maxx Post Extras:       achronut member Reged: 01/23/09 Re: Modified Canon white balance ! [Re: bouffetout]       #5561708 - 12/08/12 11:51 PM Edit   Reply   Quote Quick Reply   Please correct me if I'm wrong. White balance is supposed to correct how an object appears when it is illuminated by ambient lighting. So in a dark environment, a dark background sky for example, there is no ambient light. And the objects (stars, etc) ARE the source of light. So WB of astro shots may be greatly affected. I shot a white paper using my modded 350D under direct sunlight and used this as the initial CWB. However, my shots of M33 turned out more on the green side. Obviously the WB was way off. I experimented further and used that initial WB setting to shoot the same white paper in a room illuminated by fluorescent lighting. The resulting image i then used as final CWB. My M45 shots' WB appeared well-corrected by this final CWB setting. Only a little tweaking of WB is required in IRIS and in PS. Edited by achronut (12/09/12 12:06 AM) Post Extras:       Magellan Pooh-Bah Reged: 01/26/06 Loc: Enfield, NS Canada Re: Modified Canon white balance ! [Re: achronut]       #5561752 - 12/09/12 12:30 AM Edit   Reply   Quote Quick Reply   I always use CWB, using a white sheet or gray card. I tell DSS to use camera CWB. I find I get better color this way. Post Extras:       nofxrx Vendor (HyperCams & Mods) Reged: 07/12/05 Loc: Palm Bay,Florida Re: Modified Canon white balance ! [Re: Magellan]       #5562806 - 12/09/12 05:12 PM Edit   Reply   Quote Quick Reply   If you shoot Raw, it makes ZERO difference what WB setting you used. WB has ZERO effect on the actual data you collect... However, I find I always get the best results leaving the camera set to CWB(the same CWB I use for DAYTIME!), having DSS/whatever SW you use to select the WB used during capture for processing. This usually gives me an easier color balance to deal with in post processing.. Again, however....who cares? your color balance(WB) is EASILY adjusted in post processing anyways using levels or curves in PS...so if you are going to process your images to your liking, who cares which WB you use. If you dont, keep it set to either AWB or CWB. Never set a modified camera to anything other than those two settings. imho. And AWB is going to be useless for daytime..obviously. but for AP, again, who cares? Hope this help Cheers Edited by nofxrx (12/09/12 05:17 PM) Post Extras:       nofxrx Vendor (HyperCams & Mods) Reged: 07/12/05 Loc: Palm Bay,Florida Re: Modified Canon white balance ! [Re: nofxrx]       #5562822 - 12/09/12 05:24 PM Edit   Reply   Quote Quick Reply   Oh, for taking a CWB, easy: 1) Set camera to AWB 2) Take a white/18% gray card outside, on a NICE SUNNY day! mid-day is best 3) Set camera to Av mode 4) set lens to MF, focus at infinity(just helps keep the image completely flat) 5) Set aperture to F/8 6) take image so that there is a nice flat image, with no shadows from the camera/lens is not visible, etc 7) go into the menu and select CWB, the camera will pull up images on the memory card that are suitable for use. Select the image you just took, and click "OK" 8) Set camera to CWB DONE! This is perfect for any STANDARD modified camera..meaning an IR Block is INside the camera! This will work for 99% of your lighting situations, even indoors.. I have used this kind of CWB for years for PAYING photo and video work! if it is good enough for the toughest clients, I think it will work fine for most casual shooters/APers! Cheers! Post Extras:       bouffetout professor emeritus Reged: 11/21/12 Loc: Canada Re: Modified Canon white balance ! [Re: nofxrx]       #5562859 - 12/09/12 05:51 PM Edit   Reply   Quote Quick Reply   Very good explanation ! All I needed to know is there...only one detail ,I use a clip-in CLS filter in my camera ,do I shoot with it or not ? Thank you very much sir ! Maxx Post Extras:       nofxrx Vendor (HyperCams & Mods) Reged: 07/12/05 Loc: Palm Bay,Florida Re: Modified Canon white balance ! [Re: bouffetout]       #5562866 - 12/09/12 05:55 PM Edit   Reply   Quote Quick Reply   For creating your CWB? yes. I would. But again, shoot WITH the Filter, but use AWB to take the image you are going to use for the CWB...this SHOULD solve most if not all of your issues. Everyone/camera/setup/location is different...but maybe this will help somewhat, or atleast get you on the right track.. Post Extras:       bouffetout professor emeritus Reged: 11/21/12 Loc: Canada Re: Modified Canon white balance ! [Re: nofxrx]       #5563011 - 12/09/12 07:21 PM Edit   Reply   Quote Quick Reply   Perfect ! Thanks again ! Maxx Post Extras:       nofxrx Vendor (HyperCams & Mods) Reged: 07/12/05 Loc: Palm Bay,Florida Re: Modified Canon white balance ! [Re: bouffetout]       #5563025 - 12/09/12 07:32 PM Edit   Reply   Quote Quick Reply   Not a problem! I hope it helps! Also to note, you do NOT need to keep this CWB image stored on your memory cards...as soon as you tell the camera to use that image for the CWB data, it stores the image DATA in the camera's internal memory, it does NOT need/use the memory card for the CWB from this point on. And it will be permanently stored inside the camera UNLESS you: restore to factory defaults, or load another CWB.. good luck! Post Extras:       bouffetout professor emeritus Reged: 11/21/12 Loc: Canada Re: Modified Canon white balance ! [Re: nofxrx]       #5563102 - 12/09/12 08:38 PM Edit   Reply   Quote Quick Reply   You did help a lot ! Thanks again ! Maxx Brodeur No wife and two loving cats Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 16 registered and 19 anonymous users are browsing this forum. 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