#2068
Message Dim 27 Oct 2013 11:31
Concertant le bruit au déclenchement:
"I got to play with an a7 for about an hour or so last week (well... it was passed around from one person to another, and back again several times), but we were in a rather loud environment so it's hard to tell, but I DID notice hearing it... I want to say it's comparable to my a900. If you NEED a camera with a quiet shutter, I would say it's probably not the camera for you"
"Lionel, good question!
I like to have quiet camera for unnoticeable shooting. I was happy because of less sound when replacing a700 with NEX-7.
But I do not understand, why both curtains can't be electronic and why this is still not available? Can somebody explain this?"
Je crois que ca a rien Ă voir avec ma question mais bon je met quand mĂŞme.
"All the electronic shutter does is clear the pixels, row by row, so that they start to receive light from a zero state. It cannot keep the pixels at a "do not look" state. Probably, the camera is unable to read and store the sensor information in "shutter time" (i.e. at the speed of movement of the mechanical shutter), so it needs the sensor masked from light at the end of the exposure while it catches up.
TV/video cameras probably do manage this, but 4K TV only uses 8Mpixels, and the "downward ripple" effect of reading an unfrozen frame row-by-row is not really noticeable on video, but would be on a still picture.
What an electronic second shutter would need to do is address the pixels row by row with an instruction to "remember but stop looking" command. The sensors are not built to do this."
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