 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| PhotoKB HomeDiscussion Groups Digital Photography Digital PhotoDSLR CamerasZLR CamerasPoint & Shoot CamerasFilm Photography 35 mmLarge FormatMedium formatDarkroomFilm and LabsOther EquipmentPhoto Technique Nature PhotographyPeople PhotographyTechnique GeneralGeneral Photo Topics General TopicsAustralian PhotographyUK PhotographyDirectoryPhoto Clubs |
Photo Forum / General Photo Topics / General Topics / July 2005AdobeRGB or sRGB?
Confused about which I should use: Adobe RGB or sRGB? Using a 20D, post processing with CS2. Half are for print, half are for internet or cd. Any advice? Phast1 > Confused about which I should use: > Adobe RGB or sRGB? [quoted text clipped - 5 lines] > > Phast1 If you are doing your own printing with a good AdobeRGB-capable printer, then aRGB will give you a wider gamut than sRGB. For the net, or if your prints are done by a lab, or a machine like a Frontier, then sRGB is the way to go. Colin D. On 27/7/05 4:43 am, in article ZKWdnZ_7uf9Fn3rfRVn-rw@giganews.com, "Phast1" <phast1@nomail.com> wrote: > Confused about which I should use: > Adobe RGB or sRGB? [quoted text clipped - 5 lines] > > Phast1 SRGB for photographic prints, Adobe for printing press. All photo labs use sRGB. >> Confused about which I should use: >> Adobe RGB or sRGB? [quoted text clipped - 6 lines] >SRGB for photographic prints, Adobe for printing press. All photo labs use >sRGB. But which one to choose if you don't know where it will end up? On 27/7/05 12:13 pm, in article puqee1hor8oopgt9euq6o50jhmgnfm56sf@4ax.com, >>> Confused about which I should use: >>> Adobe RGB or sRGB? [quoted text clipped - 8 lines] > > But which one to choose if you don't know where it will end up? SRGB, you can always assign a profile in Photoshop later. > On 27/7/05 12:13 pm, in article puqee1hor8oopgt9euq6o50jhmgnfm56sf@4ax.com, > [quoted text clipped - 12 lines] > > SRGB, you can always assign a profile in Photoshop later. Sorry, but no. You cannot reliably convert to a wider gamut from a narrower one. You should start with the wider - aRGB, and convert to sRGB if necessary later. Colin D. >SRGB, you can always assign a profile in Photoshop later. No. You should shoot in your widest possible gamut, which in this case is Adobe RGB. You can convert to sRGB later, which has a smaller colour gamut , in Photoshop or another image editor. If you shoot in sRGB there is very little point in converting to Adobe RGB later because you have already potentially lost colour data. The other reason for capturing in Adobe RGB is that more and more devices are being built that can use all of the gamut captured in that space, and with the continual improvement of raw processors and colour output devices your archived image may become more usable in the future if you use the widest possible colour space. > No. You should shoot in your widest possible gamut, which in this > case is Adobe RGB. You can convert to sRGB later, which has a smaller [quoted text clipped - 6 lines] > output devices your archived image may become more usable in the > future if you use the widest possible colour space. Of course, if you are shooting RAW, it doesn't really matter what profile you use. You can switch it in the raw file editors [like the Adobe plugin] without issue. Only when you convert to another format (i.e. JPEG, or I think even PSD) will the profile matter. I always shoot raw (with Adobe RGB set) and then do all my processing in this color profile. When I am finished processing, I convert to either sRGB or the printer profile (Costco supplies the profiles for their printers!) and then save as JPEG quality 10 or 12 for upload.  SignatureThomas T. Veldhouse Key Fingerprint: 2DB9 813F F510 82C2 E1AE 34D0 D69D 1EDC D5EC AED1 Spammers please contact me at renegade@veldy.net. > >> Confused about which I should use: > >> Adobe RGB or sRGB? [quoted text clipped - 8 lines] > > But which one to choose if you don't know where it will end up? AdobeRGB has a wider gamut. You can convert to sRGB later if you need to. If you're shooting RAW, the setting doesn't really matter on the camera, since you can change the color space when importing the file. I shoot RAW, with the camera set to AdobeRGB and convert to sRGB as needed. YMMV. :-) Thanks guys. Phast1 > Confused about which I should use: > Adobe RGB or sRGB? [quoted text clipped - 5 lines] > > Phast1 Always shoot Adobe RGB. Always shoot Adobe RGB. Always shoot Adobe RGB. AdobeRGB is the wider color space. You can always down convert to a smaller color space but you cannot upconvert if the data is not in the image to begin with. On 27/7/05 7:53 pm, in article PKQFe.1415$kk6.330@newssvr13.news.prodigy.com, "bmoag" <aetoo@hotmail.com> wrote: > Always shoot Adobe RGB. > Always shoot Adobe RGB. > Always shoot Adobe RGB. > AdobeRGB is the wider color space. You can always down convert to a smaller > color space but you cannot upconvert if the data is not in the image to > begin with. You are wrong, there are NO monitors which can display that gamut and probably no printers either, sRGB is the industry standard. > On 27/7/05 7:53 pm, in article > PKQFe.1415$kk6.330@newssvr13.news.prodigy.com, "bmoag" <aetoo@hotmail.com> [quoted text clipped - 9 lines] > You are wrong, there are NO monitors which can display that gamut and > probably no printers either, sRGB is the industry standard. If you use Photoshop, your sRGB image will probably be converted to Adobe RGB for editing, and then back into sRGB when you save it. Adobe's profile conversions are pretty good, but it's still an extra couple steps of conversion being applied to your image. You can, of course, change this behavior of Photoshop and have it use sRGB for the working space, but it doesn't make sense to limit the gamut for editing, just as it doesn't make sense to limit the gamut in shooting, all things being equal. Now I'm really confused. I do have photoshop using the sRGB profile, like the camera. I see what you're saying though. I suppose since I archive the RAW's I'd be able to covert if/when neccesary. Phast1 "Paul Mitchum" <usenet@mile23.c0m> wrote in message >> > If you use Photoshop, your sRGB image will probably be converted to > Adobe RGB for editing, and then back into sRGB when you save it. [quoted text clipped - 6 lines] > for editing, just as it doesn't make sense to limit the gamut in > shooting, all things being equal. On 28/7/05 1:32 am, in article r4idncuhEIHgunXfRVn-2Q@giganews.com, "Phast1" <phast1@nomail.com> wrote: > Now I'm really confused. > I do have photoshop using the sRGB profile, like the camera. [quoted text clipped - 16 lines] >> for editing, just as it doesn't make sense to limit the gamut in >> shooting, all things being equal. No confusion necessary, use sRGB > On 27/7/05 7:53 pm, in article > PKQFe.1415$kk6.330@newssvr13.news.prodigy.com, "bmoag" <aetoo@hotmail.com> [quoted text clipped - 9 lines] > You are wrong, there are NO monitors which can display that gamut and > probably no printers either, sRGB is the industry standard. Partly right. Monitors cannot accurately display Adobe RGB. But better cameras can shoot in aRGB, and the better printers cn print in aRGB. My Canon i9950 definitely prints in aRGB, and the results are easily visible. Commercial labs use sRGB for reasons of simplicity. FWIW, the aRGB gamut extends further into the blue-green region than sRGB, and images containing colors in that range, like ocean/water shots, and bush scenery do have better repro in that area. Colin D. I have been confused about this as well. My lab wants srgb. Stock library requires adbobe rgb. So do I shoot everything in Adobe rgb and convert to srgb for print...is conversion quick and easy as I send a lot to print? margaret >I have been confused about this as well. My lab wants srgb. Stock library >requires adbobe rgb. So do I shoot everything in Adobe rgb and convert to >srgb for print...is conversion quick and easy as I send a lot to print? http://www.digitalkb.com/nikon_d70/nikon_d70_articles/work_with_argb/ > I have been confused about this as well. My lab wants srgb. Stock library > requires adbobe rgb. So do I shoot everything in Adobe rgb and convert to > srgb for print...is conversion quick and easy as I send a lot to print? > > margaret For me, using Canon gear, the easiest way is to shoot RAW, then in the RAW converter program - despite detractors I use Canon's Zoombrowser V - I can choose what color space I want. I simply convert the RAW file twice, once in aRGB, and again in sRGB, saving the output as the same filename but with (a) or (s) appended. You could probably set up an action in PS to batch-convert files from aRGB to sRGB, but I haven't had to do that, so I can't help there. Later versions of Photoshop - I think from 6 upwards - allow you to choose or convert the color space as you want, but note that converting from sRGB to aRGB will achieve nothing because the sRGB image has no colors that can take advantage of the extra gamut afforded by aRGB. I have no knowledge of other image-handling programs. Colin D. >>I have been confused about this as well. My lab wants srgb. Stock library >>requires adbobe rgb. So do I shoot everything in Adobe rgb and convert to [quoted text clipped - 8 lines] > filename but with (a) or (s) appended. You could probably set up an > action in PS to batch-convert files from aRGB to sRGB Yes, I've got one for web re-sizing which also does that conversion. That's the basic question, is how much hassle are you willing to put up with to use a-rgb. I usually don't bother converting for web and it usually doesn't matter much, it's just nice to know I've got archives with the widest gamut. >, but I haven't had > to do that, so I can't help there. > > Later versions of Photoshop - I think from 6 upwards - allow you to > choose or convert the color space as you want, but note that converting > from sRGB to aRGB will achieve nothing If you planned to tweak the colors in post-processing, it might be helpful but yes this is generally not the sensible way to go. > because the sRGB image has no > colors that can take advantage of the extra gamut afforded by aRGB. > > I have no knowledge of other image-handling programs. > > Colin D. SignaturePaul Furman http://www.edgehill.net/1 san francisco native plants |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.