Shooting video in AV or TV mode..

I am trying to figure out if the following is possible when shooting video a 6d:

In AV mode, set aperture and ISO and let the camera determine shutter speed. I can not seem to adjust the ISO nor aperture. The aperture seems to be fixed at 5.6. Any ideas why?

In TV mode, I wish to set the shutter speed and ISO and let the camera determine aperture. But the camera won't let me change shutter speed nor ISO.

I am trying to see if there a better way to handle exposure in situations where the light condition changes +- 2 stops. Instead of using my eyes to detect, I want to see if the camera can make the adjustment for me.

Canon 6D Video Recording

So the camera make already its best but naturally this can't exclude the operator.

kenwood33 wrote in post #16926148
I am trying to figure out if the following is possible when shooting video a 6d:

In AV mode, set aperture and ISO and let the camera determine shutter speed. I can not seem to adjust the ISO nor aperture. The aperture seems to be fixed at 5.6. Any ideas why?

In TV mode, I wish to set the shutter speed and ISO and let the camera determine aperture. But the camera won't let me change shutter speed nor ISO.

I am trying to see if there a better way to handle exposure in situations where the light condition changes +- 2 stops. Instead of using my eyes to detect, I want to see if the camera can make the adjustment for me.

Manual exposure with Auto ISO?

I use manual shutter (twice the frame rate) and manual aperture usually set at f11. The ISO I've set to automatic, this copes with most stuff, though if exceptionally bright a ND filter can help rather than stupid f22 for example. Conversley if it gets a bit dark opening up the aperture to avoid to high an ISO with subsequent noise.

I have 1/50 f11 and AutoISO 1080p set as my C1 user setting and 1/125 f11 Auto ISO 720p as C2 on my 7D so I can quickly grab a setting if I want to shoot some video. If something specific a more considered setup may be used.

artyman wrote in post #17072179
I use manual shutter (twice the frame rate) and manual aperture usually set at f11. The ISO I've set to automatic, this copes with most stuff, though if exceptionally bright a ND filter can help rather than stupid f22 for example. Conversley if it gets a bit dark opening up the aperture to avoid to high an ISO with subsequent noise.

Keeping the shutter speed at twice the frame rate when the frame rate is around 25fps can be a chore. Luckily a lot of my stuff is taken in low light. I normally use f/5.6 which allows me to cover some manual focus inaccuracy (can happen when I shoot quickly- street scenes with people) while giving me some subject isolation. This is not written in stone but it's a starting point for me. Auto ISO, which I never use when shooting stills, is a saving grace when shooting video with changeable lighting.