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Nikon DSLR Cameras
D5100
Interval Shooting - Randomly Stops
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<blockquote data-quote="§am" data-source="post: 79566" data-attributes="member: 9187"><p>Not entirely true I'm afraid.</p><p>The card doesn't necessarily control how fast it is written to, but it certainly does have a huge say in the matter.</p><p>Higher class SD cards will tend to write faster then lower class cards. How much difference in the writing speed will depends from manufacturer to manufactuer and also the model of the card.</p><p></p><p>As a guide, higher class cards (eg. Class 10) will be written to faster then say a Class 6 card.</p><p>One thing to note is, that read speed is nearly always much faster then write speed, and it's usually read speed that most manufacturers quote on their marketing blurb (unless they specifically mention the write speed of course).</p><p></p><p>I'm guessing your 64GB SDXC is at least a class 10 card, but if it's also a UHS-1 compatiable card, then you can be assured their will be a minimum write speed for that.</p><p>What card have you got out of interest?</p><p></p><p></p><p>Back to your problem in hand - I agree, the long exposure is probably filling up your buffer and it's taking more then a second at a time to write that to the card, however, I would imagine that the camera would be writing to the card as it 'takes the shot', so in theory it should not have that much data to write to the card backing up all the time to the point where it has no internal buffer space.</p><p>Play around with times between exposures see if that helps.</p></blockquote><p></p>
[QUOTE="§am, post: 79566, member: 9187"] Not entirely true I'm afraid. The card doesn't necessarily control how fast it is written to, but it certainly does have a huge say in the matter. Higher class SD cards will tend to write faster then lower class cards. How much difference in the writing speed will depends from manufacturer to manufactuer and also the model of the card. As a guide, higher class cards (eg. Class 10) will be written to faster then say a Class 6 card. One thing to note is, that read speed is nearly always much faster then write speed, and it's usually read speed that most manufacturers quote on their marketing blurb (unless they specifically mention the write speed of course). I'm guessing your 64GB SDXC is at least a class 10 card, but if it's also a UHS-1 compatiable card, then you can be assured their will be a minimum write speed for that. What card have you got out of interest? Back to your problem in hand - I agree, the long exposure is probably filling up your buffer and it's taking more then a second at a time to write that to the card, however, I would imagine that the camera would be writing to the card as it 'takes the shot', so in theory it should not have that much data to write to the card backing up all the time to the point where it has no internal buffer space. Play around with times between exposures see if that helps. [/QUOTE]
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Nikon DSLR Cameras
D5100
Interval Shooting - Randomly Stops
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