richandfleur wrote:
You can totally limit your ISO to a fixed value or a min and max band.

McGregNi wrote:
When working in an 'automatic exposure' mode such as Av, TV, Tav, Sv, the process to adjust exposure is 'exposure compensation', which forces the camera to change the exposure value (ev) by adjusting the variable parameter and while holding the 'priority' parameter ....eg in TV mode then 'time value' is the priority parameter, and aperture would be varied to force the exposure change.

Maria, you said you wanted to change the 'exposure time' ,so I'm guessing you wanted to have a slower shutter speed for a movement effect. I suppose if you needed to do this but wanted an automatic exposure, then TV is the mode to choose. As you lengthen the time value then to compensate the aperture would get smaller and smaller, keeping the brightness the same.

I agree with the others here who have referred to manual as the most versatile mode, but as said you need to keep a close eye on the exposure variation scale along the bottom of the viewfinder to be sure you don't get too far away from your intended brightness.

Matt1103 wrote:
You're welcome Maria. I had a few minutes spare and thought I'd try to help out.
Matt