SDHC to CF card adapter?

S

speculator

Active member
I was wondering whether getting some Class 6 sdhc with a cf adapter (like the cr-7000) is a good idea when shooting 1080p? Its relatively inexpensive compared to CF, but will it sustain the bitrates required by the 7d?
 
Bump. I bought several 16GB SDHC Cards for the D90 that I would sure like to migrate to the 7D...
 
Nobody has ever tried this? Not even on a 5d (preferably class 6...i know there was a test around on the cr7000, but it was on a class 4 sdhc)?
 
Actually most SD-CF adapters are pretty slow, I've read somewhere it's a maximum write rate of 3-4MB and read rate is about 5-6MB. Can't remember where exactly.
I was about to take the plunge too since I already have 2x Panasonic 16GB SDHC class 6.
 
Unfortunately, even class 6 cards aren't that fast compared with a good compact flash card. However, if you have microSD cards, you might be interested in RAID'ing them together in one of these:

http://dvice.com/archives/2009/06/compactflash-ad.php

Not sure if it has been released or will be in the future. However, to illustrate the speed disparity between the two card formats, check out these links:

CF Cards:
http://www.tomshardware.com/reviews/compactflash-card-memory,2166-11.html

SDHC Cards:
http://www.tomshardware.com/charts/sdhc-memory-card-charts/Avergage-Write-Transfer-Rates,863.html

Also, a great resource to see benchmarks of specific memory cards in actual cameras is right here:
http://www.robgalbraith.com/bins/camera_multi_page.asp?cid=6007-9784

Hope that helps. It would seem that quite a few good SDHC cards could theoretically satisfy the ~45mbps requirement for the codec, but I'm not sure if you'll get sustained throughput that actually matches those numbers.
 
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