Hey Crash-Film... Got a response to your card write-speed issue.
The math doesn't seem to add up when it comes time to how a card performs... Put a Komputerbay 64GB 1000x in a Canon 5DIII and experience 125MB/s write speeds. Place the same card in the 50D and experience approximately 70MB/s. The difference can be in the EXFAT format and the FAT32 format limitations. In addition to the card's read/write limitations, the camera also has it's read/write limitations. Thus, it's important to find the correct mate, if you will.
The reason why the math isn't really panning out is because the camera is writing data at the very edge of it's capabilities. And since it appears that your card is pushing the edge of it's capabilities, in addition to your camera, you may be dealing with what may be described as a double-negative recording process.
Try searching the ML forum and you might discover that the Lexar Professional 1000X and the Komputerbay 32GB 1000X, and the 64GB 1000X are the cards of choice. I can't write that for sure, of course. Myself, I've primarily been glued to the 50D Raw Recording forum and not so much the 5D II and 5D III. Anyway, the best value is probably 64GB 1000X from Komputerbay.... By the way Komputerbay has been quoted as stating, "We receive/sell/brand Lexar Professional's cards that didn't meet the highest, most stringent quality-control measures."
Aside from that bit of re-assurance in the quality of the Komputerbay, having originated from a high-end compact-flash card manufacturer, I guess we're discovering that the Lexar 800 compactflash card is more of an entry level UDMA 7 rather than a high-end UDMA 7.
You might consider turning off every feature not related to raw_record, and completely clear the screen of excess overlays, in addition, make sure you have all of your Canon menu settings for image & exposure set to disable. These are definite disrupters for maximizing raw_record.
Hang in there and keep up with the posts. See you around.
- Levi
thanks levi!
okay, i got 720p raw video.....with the x800 card its absolutely no problem.
that´s all i wanted since i could not get it with my 550D.
i can even get the 14.. x 5.. 1:2.20 (it´s to hot, to grab the camera just for that...) resolution@23,9 fps and the buffer is like <*.....> and idling. just one step greater in vertical resolution and the buffer fills continuously up. so it´s the cards performance for shure.
i think card manufacturers gain their incredible x1000 speeds by creating a card intern raid. ( as in panasonics P2 cards are technically SD-Cards in a raid) also the used memory chips influence the memory bandwith with their inner structure.
so in a 32 GB card may be the doubled infrastructure of a 16 GB card. leading to a theoretically doubled performance.
and so on....
as far as i can remember CF cards where always the fastest cards because of their intern UDMA controller. maybe in some cards (komputerbay) there´s a controller with two "lanes" each with a memory interface that matches the 16GB modules. so in the 16 GB card there´s just one "lane" used. in the 32 GB card both of them are used. and in the 64 GB card a controler optimized for four 16 GB modules (or two 32 GB modules) is used. and this controler is also used in the 128 GB but organized in a way that´s good enough for marketing but technically not perfect. this explains the different performances of differently sized cards.
i know there´re no 16 GB modules and so on and memory is organized and transferred in bits.
but i hope i could explain my thoughts about this as plain as possible
so as long as there´s no card manufacturer, that gives exakt specs of it´s cards there will be always some gambling.
you must always hope that e.g. komputerbay understands the needs of it´s customers and doesn´t just follow the law of economy and raises the prices and lowers the production costs.... by changing to a cheaper controller or memory chips.
maybe a magic lantern raw performance guarantee and a nice sticker on the box would help. of course making the card 10% more expensive than the standard cards but encouraging the manufacturer to hold up performance.
and there´s a lot of marketing in those memory cards.
sony itself offers a SxS to SD card adapter. no problem recording on a cheap 32 GB class 10 card in a EX1. or F3.... if you want to
not the fastest cards on the market will do the trick, but to find cards which match the memory interface ( or call it bandwidth limit) of the specific cam as close as possible should safe buffer and gain bandwith.
and i am pretty shure i am telling no news to the most of you...
i ordered a komputerbay 32 GB x1000. the lexar 16 GB goes back to the retailer. final step will be the lexar 32 GB x1000
would love to buy them all and cross check in my own camera. but, could get a little bit expensive.
we will see...
