katiedicksonphoto

No offense, but you just need some knowledge about focal length and physics
 
A lens never knows the sensor behind it. A 35mm will always be a 35mm, regardless if there's a Canikon, Hasselblad oder Fuji behind it. Or even a smartphone. What will definitely change is the angle of view. It's much smaller on a small sensor so it seems as if the focal length would be a greater one.
 
So what you really want is the same angle of view on every camera. But no one ever uses this attribute - all we talk about is the focal length. This is why everyone is confused when it comes to the crop factor.

You probably have a fixed ISO value. The EC dial can only have an effect if it's allowed to change something; and, if you've set the aperture and shutter speed manually, the only possible adjustment available to the camera is the ISO setting. In manual mode, the "EC" value in the viewfinder actually becomes a light meter reading: the fact it reads -3 implies that your combination of shutter speed, aperture and ISO would result in any shot being at least 3 stops underexposed.
 
 
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