Sorry, I have to respectfully disagree with the poster above - this is definitely not a Civil War Photo.
The women's bodice has a lower and more sculpted waistline, popular in the 1880s.
Fashion-era.com has lots of helpful information about women's clothing throughout history, but it is based in the UK, so keep that in mind.
The men's clothing absolutely looks to be from the 1880s or 1890s; This website might be helpful - it has photos of men's clothing from 1840s through the 1890's, organized by decade:http://www.gentlemansemporium.com/1880-victorian-photo-galle...
Photos are such an important part of our research - I hope you are able to solve your photo mystery! :-)