Flicker in stills on the a7R II

[vschroeder]

Hi guys,

 

I came across this weird phenomanon when shooting with the Sony.

It created horizontal lines over the image when shooting in certain light circumstances.

This is something I only came across before when shooting video with the wrong shutter settings.

Sometimes the hz in the electric grid interfere with the shutter settings and that is usually what makes this, but in my 6 years as Canon shooter all over the world I never came across this in stills.

 

Any idea what can cause the problem?

 

 

 

[Guest Peter Kelly]

The only usual occasion I know of where you get lines of varying exposure is when the lighting is neon, or LED, and the flashing of the bulbs varies as the shutter tracks down across the frame, but your shots aren't of that type of image.

 

I'd be interested to see the exif, though, as the effect looks very odd, but my initial thought is that it is, unfortunately, a camera fault.

Perhaps someone who knows the intricacies of how the sensor is 'scanned' might be able to suggest a mechanism, but I bet the depth of each line is proportional to the shutter speed.

You can see the same five areas in each shot, but they are different thicknesses. Given the apparent stronger light in the first I'm hazarding a guess that the effect varies accordingly.

 

Also, I suspect it is still happening on all shots. However, you don't see it in broad daylight, or anything well lit, as on the 'spotty' background of your first example.

[willbyington]

I had this problem also with the same kind of lighting situations... I found it happened more often when I was using "silent shooting".  Never was able to 100% figure out the cause though. Will be interested to hear more... 

[alastc]

It might be a variation on the 'brown banding' issue, check the forum index for that, I think it is on page 2.

 

If it is only in silent shooting miss them that is probably the cause.