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Does your LCD screen flash when focusing with the R5?

Started Nov 28, 2020 | Discussions thread
PicPocket Veteran Member • Posts: 5,897
Re: Does your LCD screen flash when focusing with the R5?
1

CWaterston wrote:

Deak wrote:

Has anyone found the cause for this yet?

I have not, but it seems to happen only when light levels are low, suggesting that somehow the camera's electronic viewfinder (EVF) is responding to the camera's attempt to adjust metering, even when the focus assist beam is turned off.

I would think that this behavior should be categorized as a bug, since the EVF itself could not possibly be assisting the camera's metering. I suppose you could argue that the EVF is "reflecting" everything that the camera sees and for that reason the flashing is appropriate. But if that were the case, why wouldn't the EVF also flash when light levels were higher?

There is likely a threshold of minimal signal the sensor needs to register to be able to AF. When the actual signal is low, that probably comes from a digital boost to excite the AF sensor (same as bumped ISO, but only during AF hence the flashing). The EVF just sees what the sensor does. A brighter scene doesn't need any flashing because you can just finish AF much quicker (think faster shutter). One you have enough signal, the AF system can take off. I'm not sure what happens if there is so much light that the fastest shutter speed with heavily overexpose, but that scenario is anyway impractical for it to not matter in practice

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