Since Adobe RGB is a wider color gamut, most photographers prefer to work in that color space. Yet most digital cameras by default, are set to work in the sRGB color space. I am often asked if converting sRGB files to Adobe RGB files is a good idea. The answer is “It doesn’t matter.”
You can do it for convenience – i.e., your output workflow depends on it. But once the image has the color space “baked in,” it neither improves or harms it to change it.
The time to set your color space is when you capture or convert. If you shoot JPGs, capture in the color space you want to work in. Set that color space as your default color space on your camera. (Read your manual to learn how to set your individual camera.)
If you shoot RAW, it doesn’t matter what color space your camera is set to work in. You can make the final decision when you convert the RAW file.