Issues with 50fps in 1080p Sony a7s ii

[spisko]

Shooting 1080p at 50fps gives me footage that isn't good quality. I am seeing what I can call aliasing and moire issues. Footage looks this way straight out of the camera, so it is nothing to do with post processing on my part. I performed some tests where i shot the same subject at 25fps and again at 50fps. The 25 fps looks much much better. 

I am setting shutter speed to 1/100 with 50 fps and 1/50 with 25 fps. Other setting such as pp are the same.

 

All this time I thought that it's me doing something wrong, but now I am starting to think that there is a problem with the camera.. 

Is there anybody who experienced this? 

[Junior Lins]

Hello, I'm having the same problem. I identified a hot pixel and sent my camera to do a remapping of the sensor in a sony assist. Now I notice an aliasing and very strong moire. I always shot at 50fps shuter 100 and the A7s II always seemed quite tolerable with moire. Now I'll go back to the store again.

 

Hi. I'm having the same problem.

I believe this is a problem with this camera.

I identified a hot pixel and sent my camera to do a remapping of the sensor in a sony assist.

Now I notice aliasing and very strong moiré. I always shot at 50fps shutter 1/100

and the A7sII always seemed quite tolerable with moire. Now I'll go back to the store again.

Regards

[cws]

Shooting 1080p at 50fps gives me footage that isn't good quality. I am seeing what I can call aliasing and moire issues. Footage looks this way straight out of the camera, so it is nothing to do with post processing on my part. I performed some tests where i shot the same subject at 25fps and again at 50fps. The 25 fps looks much much better. 

I am setting shutter speed to 1/100 with 50 fps and 1/50 with 25 fps. Other setting such as pp are the same.

 

All this time I thought that it's me doing something wrong, but now I am starting to think that there is a problem with the camera.. 

Is there anybody who experienced this? 

I'd suggest one test which may or may not prove anything....  keep your shutter speed at 1/100th at both 25fps and 50fps... and see if you are seeing the same quality issues on the 25fps foottage with the same shorter sensor exposure time.

For 25fps open your aperture 1 stop to compensate for the speed change from 1/50th to 1/100th, leave ISO the same...  just so you are only changing one factor that isn't part of the sensor itself.

Just thinking it might be an effect of the shortened exposure time in video....?