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Recommendation on speed of CF for fast sports shots...
- Thread starter omega
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7D and 5D3. Thanks.What camera are you using?
The answer is almost certainly NO. But the camera model will help people to answer you better.
OK
Max buffer for the 5DIII raw + JPG is 7 shots (assuming you are shooting large fine JPGs.
Max buffer for the 7D raw + JPG is 6 shots (same assumptions as above).
So - that's your guaranteed burst before things start to slow down.
I shoot motorsport, so a burst of 5-6 seconds is not something I would ever do. That is a long burst in anyone's book. Are you sure you need to shoot a burst for this long?
Anyway - assuming you do, I doubt you'll be able to do it on either camera - even with the fastest cards.
I use mainly 60MB/s cards and the best I've done is an 8fps burst (7D) of 18 images (just raw - no JPG in parallel). After that it slows down - though I really can't help you with what frame rate it drops to (as I just don't need to do bursts that long).
If you absolutely must shoot bursts at 8fps/6fps for 5 or 6 seconds then you should consider just shooting raw or JPG (not both) and also dropping to a lower resolution - SRAW for instance.
Thanks schmegg! Your comment is so valuable.OK
Max buffer for the 5DIII raw + JPG is 7 shots (assuming you are shooting large fine JPGs.
Max buffer for the 7D raw + JPG is 6 shots (same assumptions as above).
So - that's your guaranteed burst before things start to slow down.
I shoot motorsport, so a burst of 5-6 seconds is not something I would ever do. That is a long burst in anyone's book. Are you sure you need to shoot a burst for this long?
Anyway - assuming you do, I doubt you'll be able to do it on either camera - even with the fastest cards.
I use mainly 60MB/s cards and the best I've done is an 8fps burst (7D) of 18 images (just raw - no JPG in parallel). After that it slows down - though I really can't help you with what frame rate it drops to (as I just don't need to do bursts that long).
If you absolutely must shoot bursts at 8fps/6fps for 5 or 6 seconds then you should consider just shooting raw or JPG (not both) and also dropping to a lower resolution - SRAW for instance.
I think I will take a continuous 1-2 seconds, break for about 1-2 seconds, and then another 1-2 seconds (all RAW+JPEG). Under this circumsstance, a 60MB/s CF is fast enough. Am I right?
That will work much better for you for sure. It's pretty much what I do, though shooting motorsport allows you gaps where the camera can completely flush the buffer and catch up before it all happens again. And I'm not shooting raw+JPG, just raw.
I can certainly notice the difference between 30MB/s and 60MB/s cards - and, in my case, I rarely (basically never) run out of buffer with the 60MB/S cards, where as I do from time to time with the 30MB/s cards.
It's basically a matter of getting the fastest card you can and then getting used to how much you can push it before you run out of buffer. Then adjusting your technique to suit.
Remember though that with raw+JPG, you'll wont even get 1 second on the 7D and only just a fraction over 1 second on the 5DIII at max burst. I'd still probably drop the JPG if I was you, just to give you more buffer (if you can). Or, drop the raw and just shoot JPG (I wouldn't do this personally, but it might be acceptable to you) and you'll get a significant boost.
Really appreciate for your sharing. I will buy a 60MB/s CF and try it out...Thanks!
I'm planning to get a 32G....64G is way too expensive......^^
That's what I use (2x32 and 2x16). I barely last a day of racing with all those!
You get around 1K raw shots (a bit more) with a 32GB card on the 7D (less on the 5DIII). That's just shooting raw though - raw+JPG will drop it down a bit.
It's worth considering that 1000 shots at 8fps is just 125seconds of shooting! ;-)
Let us all know how you go - love to see some of your shots some time!
Watch out for 'b' bits vs 'B' bytes. The card you refer to is probably rated at 30MB/s
The average combined size of a RAW and JPEG from my 50D is around 22MB. At 6fps, this is 132MB/s. 30MB/s won't be able to keep up with continuous shooting at this rate.
This camera has a buffer which can hold 10 shots worth of RAW+JPEG or 16 shots of RAW. Using a faster card will probably improve the rate at which this buffer is written to the card. Presumably there is an upper limit to the rate at which the 50D can write to even the fastest cards so that you won't necessarily see the full benefit of using a very fast card.
I use a Sandisk 30MB/s CF card and a Silicon Power 200x CF card. Both perform well for burst shooting. I usually get the specified 10 frames of RAW+JPEG before the rate drops. JPEG-only shooting is virtually unlimited at 60-90 shots.
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