Hi everybody,
I am a beginning ancient coin collector and I would like nothing more than to learn to correctly attribute ancient and medieval coins. I found that I enjoy attributing more than actually owning and collecting coins, and to help out with that process Pishpash very kindly donated some worn coins that would give me a challenge.
To confirm whether I'm on track however, I would very much appreciate it if you could go over what I have attributed and see whether I made mistakes or whether additional information can be distilled. I'm also a real beginner with photographs and don't even own a camera - shots were taken with a mobile phone. Hopefully, you can still see some of the details of the coins.
Constans and Constantivs II
http://i58.tinypic.com/24pwkle.jpgConstantivs II
http://i58.tinypic.com/242vjlt.jpgValens
http://i59.tinypic.com/121bxy1.pngAnd this one I'm most unsure about. I believe this one to be a Valentinianus I... or II. I think I is the best bet, but I'm not sure. GLORIARO MANORUM. Field right of labarum shows a B or possibly an R.

How did I do? Hopefully I did not get them all wrong. Regardless, the exercise is very fun and I'm looking forward to showing you my next batch if you guys don't mind. Additional question; do I need an expensive camera to make good shots of coins?
Edit: Made links out of the images as I did not realise there was a rule against posting more than two images.