>>3905351>You simply set the aperture to whatever F-stop you want and the camera computes the shutter speed for an ideal exposure.That only works if the camera has an aperture priority mode you can switch to. If you do that on the T70 your shutter speed is just going to be stuck to whatever you set it to and will not change until you change it yourself.
Try it yourself. See if the SS changes at all when you cover the front of your lens with your hand. It won't.
