Originally posted by loikos Hi,
I've been reading and trying a lot of solutions to solve this problem, without success :
why can't I chose the speed in speed priority mode, when the lens is not on A position (automatic aperture) ?
I only can change the ISO, or set auto ISO (and so the speed is set automatically on 1/60s).
I would like to use TV mode and be able to change the speed.
Thanks for your help
Loïc
Just set the aperture in A-position and Tv-mode will work. After all Tv-mode is to be used when you want to control the shutter speed and let the camera set aperture.
When setting aperture i non-A-position the camera can't control aperture and will have no info on which aperture is in use, so all automatic modes will stop working. The camera will then be locked in Av-mode no matter what automatic mode you choose, and the camera will only use the lens with aperture fully open.
If you want to control both aperture and shutter speed you can use manual mode, and if you want to use auto-ISO then you can use TAv-mode, but TAv-mode will only work if aperture is in A-position.