Is there an SLR with no viewfinder blackout?

Started Jan 14, 2014 | Questions thread
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Erik Magnuson Forum Pro • Posts: 12,247
Listen, don't just watch - 12FPS lasts for one second

Vikas Rana wrote:

It may be an issue in earlier firmwares and fixed later but EVF only shows what sensor sees, watch this video and see how milliseconds are changing after every click:

https://www.youtube.com/watch?v=E0oAno5MD5I

Are you listening to the audio? It's only running at 12FPS between ~ 6:03 and 6:04 after which it slows to slightly more than ~1FPS. (DPR says 14 frames @ 12FPS before it slows to 1.5FPS, so that's about right.)

At 12FPS, there is an image every 83ms. The video is 60FPS which means each video frame is ~17ms. Do the numbers in that critical second at 12FPS jump by ~17 each time or ~83? (Actually, I see it jump by about 100ms between updates, e.g. 245->345). At 1.5FPS you actually see numbers overwriting each other mid-update. BTW, why does it start "blacking out" when running at the slower speed? (Hint: it's the time when the shutter & sensor are resetting after exposure. The sensor is blocked by the second curtain!)

You can see the difference between the "discrete" and the "continuous" update of the ms numbers in the 8FPS video more easily.

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Erik

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