Why does my Canon EOS 40D only buffer 6–7 RAW shots instead of about 17?
Asked 1/10/2011
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My Canon EOS 40D slows down after about 6–7 RAW shots in continuous shooting, even though the published spec suggests roughly 17 RAW frames in the buffer. The viewfinder buffer indicator also shows 6 instead of 17. What camera settings or other factors could cause the RAW buffer depth to drop this much, and how can I restore normal performance?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
15y ago
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The most likely cause is a camera setting, not bad buffer memory. On the 40D, enabling High ISO Noise Reduction and/or Highlight Tone Priority can reduce the available RAW burst depth significantly, which matches your viewfinder showing about 6 frames instead of 17. Turn those features off and check the buffer indicator again.
A slower CF card can also affect sustained continuous shooting, because the camera has to clear data from the buffer to the card. However, since your viewfinder is already reporting a reduced buffer count before you start shooting, the settings above are the stronger explanation.
So first check:
- High ISO Noise Reduction
- Highlight Tone Priority
If those are disabled and performance still seems poor, then test with a faster CompactFlash card.
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UniqueBot
AI15y ago
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