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R5 weird "stuttering lines" shutter

Started 1 month ago | Discussions thread
Sittatunga Veteran Member • Posts: 5,406
Re: R5 weird "stuttering lines" shutter
2

TrackDayLT4 wrote:

Karl Petersson wrote:

I am not sure if I am doing someting wrong or just being stupid.

I did some shoots at a restaurant and did a few people walking past the camera shoots and having them blurry with a slow shutter.
In both these cases it is 800 iso a fstopp 3,2 and the shutter is 1/13 and 1/15

On the 1/15 I get this stuttering lines and the 1/13 i am getting a completly normal blur. A later shoot at 1600 iso, f2,8, 1/40 I am getting the same effect.

I am using electronic 1st curtain and the anti flicker is on.

Can anyone tell me what might be the setting I am doing wrong and what I should do to get "normal"blur rather then this kind of line blur or whatever to call it.

all are done with RF 24-70 2,8

"stuttering" lines 1/15 of a sec

I count 8 stutters during the 1/15 shutter speed which equates to 120 hz strobe of the room lights.

That figures; it's twice the US mains frequency, which is what you'd expect from compact fluorescent bulbs or LEDs feed through a simple rectifier. (Is Iceland 50Hz or 60Hz AC?)  There's nothing you can do about that with any shutter setting. The anti-flicker setting just ensures that, in continuous shooting, the shutter opens at the same phase of the brightness cycle, so it won't affect exposures that, like yours, are longer than the mains frequency.

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