A question about EV compensation control on the A510

[EWins]

Can someone explain to me the logic behind having the EV +/- control available in P TV and AV modes but not in full manual?

I'm a rookie at this so please forgive my ignorance. I assumed that you would want EV +/- controll available in all of the modes "manual" modes. I don't understand why they left it out of the full manual mode.

Does anyone have any insight on this?

P.S. Otherwise, I love this camera. Took some decent shots over the weekend with it and I have to say they aren't bad for not having touched a camera in about 14 years.

[Balrog]

There are two basic settings that control how much light gets to your camera sensor: the Aperture (how large your shutter opens up), and the Shutter speed (how long it stays open).

In Tv (time value) mode, you specify the shutter speed, and the camera automatically picks an aperture that it 'thinks' would get a correct exposure.
In Av (aperture value) mode, you pick the aperture, and the camera decides on a shutter speed that it thinks will result in a correct exposure.

What +/- EV does is to tell the camera you want a brighter or darker image, so when it's making its choice, it takes that into account. Like say, in Av mode you pick F4.0 and the camera chooses 1/100 as the shutter speed. If the resultant image is too dark, and you want something brighter, you select +1EV ... now for the same scene, still at F4.0, the camera would pick something like 1/50 as the shutter speed, leading to a brighter image.

When you go to full manual exposure, the camera doesn't have any say in the exposure anymore (since you're picking both shutter speed and aperture), so +/- EV has no effect.