A tiny and personal test of some EVF

Hello Roland Karlsson

Roland Karlsson wrote:

C-Y-R wrote:

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.

The 60 Hz is a myth. It is based on old measurements. And that is why TV have usually have higher refresh rates. Many people can see more.

The main problem when panning in games is neither flicker nor tearing. The main problem is the lack of smooth movement. Lets say that I pan the entire monitor width in one second, which is totally possible for a gamer. Then things are moving e.g. 2400 pixels in one second. During this second 60 sharp images are shown. The offset between those sharp images is then 40 pixels. This means that sharp stuff with high contrast looks like several images instead of a smoothly moving image. Some games fix this by blurring the movement.

And this problem, of course, also can happen in an EVF. You turn around and the refresh rate is right now only 1/10 second. You see several images instead of a smooth moving image.

I think the problem when panning should do show the same problem, when hold the camera still, but a dancer is now moving around the 'still' stage-scene. It might be nice when the dancers movement looks now smooth, but when the camera expose the EVF pictures with a 1/30, the dancers movements never looks so sharp as my eyes do see this movements, because my eyes use a 'faster exposure time' Therefore, when I look at an EVF and hold the camera still and there is no movement in the scene, the EVF could look's very good. I even could not notice that the camera expose the EVF pictures maybe with an 1/30 or 1/15 when the camera has IBIS. But when a subject is moving, I can get aware how good the EVF is in low light. When you try it with panning, you may see effects like stuttering or it looks smooth, but your eyes don't have such a control about the scene as when all things are still and it watch a moving person via the EVF.

For example: I did read that a user described that his EVF looks sharp during the camera did focused, but when the focus was done the EVF did look's (again) a little softer. It can be that the camera used for focusing a higher ISO and the fast shutter speed the user did choose and later the camera did use again for the EVF view a lower ISO but with a longer exposure time - in a low light scene.

At last: There must be an exposure different for the EVF pictures the camera present the eyes and the exposure times it need for to judge a CDAF and PDAF result. I mean it makes no sense to expose a picture 1/30 sec. and judge if the motion blur picture is in focus .

Best regards. KPM2