Yes, but gave credit to the photographer. Do you feel that is improper?
Usually when I use a photo, I get permission first. Even if I am giving credit to the photographer. I also provide their website.
For example, this photo: http://www.summitpost.org/image/90470/153383/fall-colors-along-the-summit.html
I contacted the photographer, got her permission, and shared her website.
I don't know if this is necessary before you post to SP, but it is what I define as correct ettiquite.
I added the link to the site the photo is from. I believe that I have located the photographer, I sent him an email.