If you are lucky enough to have a photo of your Civil War ancestor, treasure it. I do have some photos of him but they are from after war ended.
Photographers came to the camps and soldiers could have their photo taken to send home, but I’ve not found a photo of my ancestor in uniform. Perhaps he couldn’t afford it or maybe there was one taken but as the years went by, it was lost.
I can only hope that there was a photo and it was passed down through his children, then to one of their children. If so, then maybe someday they will post it to Find-a-Grave or to Ancestry or eBay or another online site. I keep searching his name on the Internet, but so far, all I find are the photos of him that’s I’ve posted.
If you do have a photo but it is damaged, scan it into your computer. There are groups on Facebook where volunteers will repair a digital photo. They can remove spots, cracks and tears, brighten it up if it is too dark, and do other magical things to restore it.
Take care of any photo that you have by keeping it away from direct sunlight that might fade an old photo. If you frame it, use the special glass that filters out the sun. Make copies of the photo and distribute them to other family members so it has a better chance of being preserved and passed down in the family. Give a copy of the picture to a museum or historical society and also post it online with information about the soldier.