Here is one with massive brightness and contrast adjustments.
Yep, adult male Ruby-throated. But you could very well get a Rufous, as the numbers of them showing up in the northeast have been steadily rising. PA especially, has been getting gobs of them.
If an adult male appeared in your yard you'd know it right away...almost the whole bird is rufous colored. But it's more likely you'd see an immature bird, and those can be much harder to identify. A big clue is the vocalization, which people describe as sounding like a geiger counter. So as fall approaches, keep your ears open......and camera ready!
Here's a link you might like; http://ebird.org/content/ebird/news/west_hum_east/