A7S Flickering when underexposed?

[2contagious]

Hi everyone,

Has anyone experienced that their A7S footage is flickering when (severely) underexposed (XAVC-S, S-Log 2)? It looks like wave-like interference in the noise, a little like there's interference from a light source shot at the wrong shutter speed. This is not the case though as there was only natural light coming from outside.

–chris.

 

[Demistate]

Are you using a lens adapter? Sometimes the Canon Metabones adapter can flicker when adjusting the iris. Rebooting the camera usually helps.

 

[2contagious]

I am using adapters, but they are passive NEX-EF mount and EF-M42 mount adapters. Shouldn't really affect the image?

 

[Ryan Lightbourn]

Hi everyone,

Has anyone experienced that their A7S footage is flickering when (severely) underexposed (XAVC-S, S-Log 2)? It looks like wave-like interference in the noise, a little like there's interference from a light source shot at the wrong shutter speed. This is not the case though as there was only natural light coming from outside.

–chris.

Digging this one up...I saw this the other night only slightly underexposed and I don't believe there was a fluorescent in the room. Could this be a slow rolling shutter issue?