Hi all, I bought few days ago a used film EOS 5000 to learn a bit of photography and have fun. I got into it because of the iPhone 4 camera and initially I wanted to by a Holga for fun(which I'll take it soon anyway) but ended up buying and EOS SLR. I got the camera for £30 with a 35-80mm and a 120 ISO film which I used today as a quality sample, but I have to wait about 4 days for the film to be developed. Anyways the camera got dust on the lenses so I guess the owner didn't really care much about this camera and I had to buy LC123A(?) battery which I don't know even if this type of battery are being produced anymore... Anyways I've been reading stuff about exposure, shutter and composition however as my camera didn't come with instruction and I'm completly new to photography I'm still a bit confused on my camera settings and would be helpful if you can help me out on this. My camera shutter settings goes from B to 2000. I know that the lower the speed the longer the film get exposed to light, but how do I decide how fast my shutter should be? Is 125 the standard? Is it related to ambient light and ISO? Thanks.