Apr 25, 2010 19:55 | #1 Have quite a few San Disk Extreme III CF cards I have used with my Rebel XT. I am getting a new Canon 7D this week. The Extreme III cards don't say anything about being UDMA rated as I've been told is required by the Canon 7D. Can I use these cards with the 7D? My Gear: 6D, 7D, EOS-M w EF-M 22 f2 STM and EF-M 18-55 f3.5-5.6 IS STM, 17-40L f4, 24-70L f2.8, 100 f2.8 non-IS macro, 70-200L f/4 IS, 400L f5.6,, Canon 1.4x II TC, Canon Speedlite 430 EX II, Better Beamer. Manfrotto carbon fiber tripod, 2 monopods, Manfrotto ballhead and pistol grip tripod heads.
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Apr 25, 2010 20:00 | #2 It is not required to use UDMA on a 7D. yes, you can use them. Jerome
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Apr 25, 2010 20:05 | #3 Thanks. I guess they'll be a little slow, but at least I can use them! My Gear: 6D, 7D, EOS-M w EF-M 22 f2 STM and EF-M 18-55 f3.5-5.6 IS STM, 17-40L f4, 24-70L f2.8, 100 f2.8 non-IS macro, 70-200L f/4 IS, 400L f5.6,, Canon 1.4x II TC, Canon Speedlite 430 EX II, Better Beamer. Manfrotto carbon fiber tripod, 2 monopods, Manfrotto ballhead and pistol grip tripod heads.
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lannes Goldmember  4,370 posts Likes: 8 Joined Dec 2009 Location: Perth, Australia More info | Apr 25, 2010 20:55 | #4 bettyn wrote in post #10064645  Thanks. I guess they'll be a little slow, but at least I can use them! You won't notice any difference. 1Dx, 1DM4, 5DM2, 7D, EOS-M, 8-15L, 17-40L, 24 TSE II, 24-105L, 50L, 85L II, 100L, 135L, 200L f/2.8, 300L f/4, 70-200L II, 70-300L, 400Lf/5.6
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R-C-G Member  109 posts Joined Mar 2008 Location: Portland, OR More info | Apr 26, 2010 02:33 | #5 Been using Extreme III and the new 30mb/s Ultra cards in my 7D and haven't had any issues or noticeable slow down. gear
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CxThree Senior Member 713 posts Joined May 2009 More info | Apr 26, 2010 07:20 | #6 I have the Extreme 3 and 4 versions and use both in my 7d. Have not noticed any difference in them at all. I got the 4s because they were faster and I thought that would be better for video. So far, I honestly cannot tell a difference. Canon EOS 5D MKIII, 7D
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musicmaster Saw the Light 853 posts Likes: 1 Joined Dec 2007 Location: Denver, CO More info | Apr 28, 2010 22:10 | #7 CxThree wrote in post #10066815 I have the Extreme 3 and 4 versions and use both in my 7d. Have not noticed any difference in them at all. I got the 4s because they were faster and I thought that would be better for video. So far, I honestly cannot tell a difference. the cards only need to be 6MB/s to record 1080p video. Gripped 70D, Sigma F/2.8 OS, 70-200L F/2.8, 300L F/4 IS, EOS M5, 18-150, 22 2.0
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