BuS_RiDeR
No longer a newbie, moving up!
- Joined
- Oct 29, 2009
- Messages
- 2,355
- Reaction score
- 83
- Location
- Riverview, New Brunswick, Canada.
- Website
- mdlphotography.blogspot.com
- Can others edit my Photos
- Photos OK to edit
I've been shooting in AV. I had the ISO set to auto so didn't think I had to worry about that.
Because Av is the aperture... It controls the diameter of the hole in which the light enters the camera... The camera then chooses a shutter speed and ISO setting to give you a correct exposure. And this results in a slow shutter speed...
I kept increasing shutter speed but the pictures kept getting darker.
I am unsure about your camera... But in Av mode you can not change the shutter speed. In order to change the shutter speed, you need to be in Tv mode or manual mode... And as you increase the shutter speed (the amount of time the aperture remains open to allow light into the camera... you need to increase your aperture and/or ISO to compensate for the differense in light being allowed to reach the sensor. This is why your shots appear dark or under-exposed.
Read the link I posted... Search the net for exposure or exposeru triangle... Get and read Bryan Peterson's book called Understanding Exposure.
Once you understand how and why the aperture, shutter speed and ISO settings are related... you will be much further ahead and you'll be able to take better photos...