July 20, 2016 at 10:50AM, Edited July 20, 10:52AM

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CF 800x for Magic Lantern Raw?

Has anyone tried using a 800x CF to record ML Raw on the 5d Mark II? For example the Lexar 800x or SanDisk Extreme Series.

I know the recommended speed rating is at least 1000x, but I have seen a few posts where people were able to get away with 800x cards, and I currently only have 800x cards.

Raw video is just something I want to experiment with, but not actually use for paid gigs.

So is an 800x good enough for ML Raw or is it worth to purchase new 1000x cards?

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Card speed varies a LOT, even when buying the SAME brand of card. I use the free ATTO disk benchmark to test the actual speed of any memory card, because sometimes expensive cards are much slower than the cheaper cards.

https://www.attotech.com/disk-benchmark/

For example I have had SanDisk cards that had a WRITE speed of 30 MB/sec, where the same type of card from Patriot ( that cost about half the price ) had a WRITE speed of 60 MB/sec when I tested them with the ATTO benchmark.

You will need a good USB 3 card-reader to test your card speed, as USB 2 card-readers are too slow to give a proper speed rating.

July 20, 2016 at 11:52AM, Edited July 20, 11:52AM

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Guy McLoughlin
Video Producer
31208

If you want 1920x1080 I'd recommend no less than 1066x. 1920x818: 1000x
Komputerbay are the ones to buy (low price), but they vary a lot so test them while you can still return them.

July 20, 2016 at 3:01PM

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Also at some point there is gonna be a bottleneck with the 5DmkII itself, and the card speed will be irrelevant. Doing long takes at full 1920x1080 on the mkII is tricky either way (or it was half a year ago.)

What I mean is at some point the card will be faster than the camera can write to it. That's when you either get a 5DmkIII, or just step down the frame size and upscale it again in post.

July 22, 2016 at 12:28PM

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