O.K., I found some more info here on the forum. One popular theme is sRGB unless processing in LightRoom. Can set in Light Room to sRGB or Adobe. If shooting in RAW camera setting doesn't matter until processed in Lightroom. Some photo printers request sRGB, some request Adobe. Shooting in JPG should be sRGB.
Is this fairly accurate?
Thanks again,
FT
Fairly. Shoot raw and ignore this issue entirely -- problem solved.
sRGB and Adobe RGB are device independent color spaces. When available as options on a camera they only apply to the JPEG file that the camera creates so that shooting and saving raw files renders the choice moot.
There are dozens of similar color spaces but in photo we basically have 4. If you look at Adobe (ACR/LR) those four choices are available to select for the RGB output file that you generate from your raw file. They are:
1. ProPhoto
2. sRGB
3. Adobe RGB
4. Colormatch RGB
You can scratch 4 as old and depreciated (Kodak). If you use LightRoom then you are forced to start with 1. ProPhoto (LR uses a slight variant of ProPhoto). LR enforces ProPhoto on all raw files run through the Develop module. When you are ready to output a finished RGB photo (JEPG/TIFF) from ACR/LR you have to choose the output color space. You can select from the list above.
Choice 4 is scratched (Adobe should really get it off there, but there's some old industry hold-outs).
Choice 1 is if the photo really isn't finished and you intend to edit it further in which case you'll still have to select choice 2 or 3 later as ProPhoto is not appropriate for a final choice. ProPhoto is only for use during editing.
Final choice then should be sRGB for everything and Adobe RGB if you're neurotic and really believe you can see a big difference in the prints you make yourself with your 12 color inkjet printer.
The sRGB space is smaller than the Adobe RGB space. Smaller here means it includes a smaller range of colors. If you're a Harley rider you probably think bigger is always better but that's often a specific Harley rider neurosis we can't talk about politely. It is however the same neurosis that goads many photographers to believe they have to use the bigger one (Adobe RGB). Think of it this way: Smaller is good because you have less room in which to screw up. Adobe RGB primarily extends the range of color into the greens and is nearly coincident with sRGB in the reds and blues. The overwhelming majority of printing hardware out there and the really overwhelming majority of viewing hardware (LCD displays) out there can't even print/display all of the color in the sRGB range yet alone the larger Adobe RGB range. We do get some small spots where a specific printer (that 12 color inkjet) or a very expensive wide-gamut monitor can print/show you specifically Adobe RGB colors. That however can leave you in an odd place; you've dropped the $1800.00 to get an Eizo Coloredge display and you can see some extra green in your landscapes and then you decide to share that photo with the rest of us. And of course all we TPF photographers are also using one of those $1800.00 Coloredge displays and can appreciate your amazing photo -- as my niece would say: NOT! So if you have any desire to participate with others and have others see your photos (your presence here would indicate that you do) then this one's easy: sRGB. Do you really want to process your photos one way for yourself and then change them all before you show them to everyone else? sRGB is the lingua franca of shared photographs -- speak some other language and you'll be misunderstood.
As you noted; printing service outlets want your photos in sRGB. If there are a few that don't they are a select few.
Joe