I have come across through many forums and sites, and saw that may people want to delete photos form facebook, but don’t have proper knowledge and guidance to do so.
Here I put down an article with images that will guide you in the better way to delete photos from face book.
1. Log in to your face book account first.
2. Click to your profile picture link
3. Click on the photo that you want to delete
Now your photo look like the below one
You can find links at the bottom-left corner of the image, you'll find "Delete This Photo" option. Click on the Delete This Photo link, and then you have to make OK to conform for a delete, like the image below
Once you confirm the "Delete Photo" the photo will get deleted form your facebook photo album
Hope this article helps you to delete a photo from facebook.