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Image Buffer Size and Settings

gfinlayson

Maidenhead, UK
244 posts

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"RE: Image Buffer Size and Settings"

gfinlayson Registered since 24th Jan 2011
Wed 26-Dec-12 11:02 AM | edited Wed 26-Dec-12 04:37 PM by gfinlayson

>Thank you.
>
>Re point 5:
>
> buffer fills faster than it can when it is empty? this is
>counterintitive. why would that be so?.
>
>re point 6:
>
>"result is about 11-12 frames" (before crawl): so
>if 12 frames, at 6 fps, that is about two seconds of
>continuous shooting before hitting the crawl. Right?

Correct.
>
>But compare point 2: 10 frames written from buffer to card in
>about 8 seconds -- but the camera is writing to the buffer at
>the same time, so this 10 seconds does not mean much more than
>how long it takes to empty the buffer when not writing to the
>buffer (i./e, when not shooting). Right?

No, in point 2, I've run the camera in CH until the buffer indicator shows r0. I then immediately release the shutter to the half press position and time how long it takes to get back to r10. During this period the buffer is only flushing to the card. No data is being written to the buffer.
>
>
>"fill rate which is 2 seconds at 6 fps". Do you mean
>two seconds per frame?

No, I meant here that you'd get 12 frames (2 seconds at 6 fps) before the capture rate slows to a crawl. At that point, data can only be written to the buffer as fast as it can write to the card (25-28MB/s) so the camera will drop to about 1.3 -1.5 fps.

This is a hot, active topic! Image Buffer Size and Settings [View all] , DeanAZ Gold Member Expert nature photographer , Sat 08-Jan-11 03:57 AM
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