What is a small format digital SLR camera?

A school I'm interested in requires me to buy a small format digital SLR camera. What are some examples of a small format digital SLR camera? Also, I was looking to buy the Nikon D3200 camera, is this a small format digital SLR camera?

См. статью: What is a small format digital SLR camera?

My Nikon D90's trash button is stuck, what can I do?

Last summer, my cousin accidentally kicked sand (I know, eep) at me and it got all over my camera. I cleaned it as best as I could, and everything was working well, except the trash button. But over time it went away. Well it's back now, and when I press the button once, it goes in and stays in, which then causes none of the buttons to work on the back of the camera. I have to turn it off, and pry the button out for any of those buttons actions to show up.
What can I do?

См. статью: My Nikon D90's trash button is stuck, what can I do?

My camera's shutter speed is really slow even in sport mode.help?

I also need help with my shutter speed in general because it always moves and doesn't stay at one speed.i have a nikon D60.

См. статью: My camera's shutter speed is really slow even in sport mode.help?