A tiny and personal test of some EVF

Roland Karlsson wrote:

Interesting question. I googled PWM flicker. OLEDS might be pulse width modulated for brightness at a frequency around 1 KHz. Some people claim they can see that, but most do not see it at all.

I have three comments

1. I have no idea if EVF uses PWM.
2. No, I do not think the problem with EVF is due to PWM flicker. I believe the problem is due to the fact that the camera cannot keep short enough exposure time.
3. I am not sure about PWM flicker sensibility. Is it for real?

Regarding number 2. It is quite easy to test. Just put the camera at M or Tv and set it a 1/100 second and there should be no problems. Then set it at 1/25 and there should be problems. I also guess that e.g. 1/30 and 1/25 should behave very differently. There should be temporal interferences. I do not have any modern EVF camera, so I have to go to a camera shop to look at this though.

Regarding number 3. I am a FPS gamer and know a lot regarding monitors and refresh rates and those problems. And I would be very surprised if anyone can see 1 KHz flicker. If you do a high speed movie of your 120 Hz monitor, then you will see that it flicker A LOT! It is only really on at less than 10% of the time or so. And, you cannot see it.

Theoretically, people can't see any refresh above 60 Hz, which is the standard for computer monitors for a long time, but if that is the case, why are gamers looking for higher and higher refresh rates?

These IPS monitors had backlights. On OLED, there is no backlight.

In your first post, you mentioned that the Nikon Z6II displayed an erratic image when turning. This is like panning while gaming and experiencing screen tearing.

From: https://www.displayninja.com/what-is-screen-tearing/

Screen tearing occurs when your monitor's refresh rate and GPU's frame rate are not synchronized. It's characterized as a horizontal split at one or more places of the image.

Except that, when you pan in a game, the lighting conditions remain constant, however the GPU's framerate changes.

In a mirrorless, the exposure changes when you pan, for example panning from a bright table lamp to a darker corner of the room. Therefore you are looking at a video feed that may change from 1/24sec to 1/60sec to 1/125sec as you pan.

Its because of these issues that I'm researching the Pentax K3 mk III. Otherwise I would really like a Lumix GH6.