lion rock I do hope your camera insurance covers accidents.
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XQD and CFast are based on PCIe and SATA technologies. As such are restricted by the same limitations. Like SATA rev 3.0 peaks at 600MB/s and PCIe rev 3.0 peaks at 800MB/s.
You're being a little imprecise there. PCIe peaks at 985 MB/s of bidirectional bandwidth per lane. However, PCIe allows you to aggregate (bond) up to 32 lanes. An x32 PCIe bus, therefore, maxes out at almost 16 gigabytes per second in each direction. Mind you, XQD currently provides only a single lane, but you could trivially turn it into a much faster standard just by throwing enough additional pins at the problem (four extra pins per lane, ignoring any ground pins that might be required to prevent crosstalk).
For a data card standard, unless I'm missing something, you could easily do away with all but three of the first 22 pins in the PCIe standard (the two SMBUS pins and one 3.3V rail). The next 14 would probably be required, though perhaps not all of the grounds. So you're at about 17 pins for the first lane, and possibly fewer. If you then add more lanes using the same ground-opposite-data scheme that PCIe connectors use, add 8 pins per additional lane.
So if you used the same 50-pin connector that CF cards use, for example, you ought to be able to do 4x PCIe with nine pins to spare (assuming that you either require everything to do 4x or require the mode to be negotiated over the SMBUS instead of using detect pins). If you use those nine pins as detect pins in some particularly smart way, you might even be able to achieve backwards compatibility with CF in both directions....
I didn't think Canon manufactured memory cards. Maybe rebranded, sure.
Anyway, I thought part of the limitation on FPS was the shutter & mirror. I'd think that on a 1DX they have pretty big memory buffers, yet they can't speed up the shutter. If they actually can get a real global shutter on the next line of sensors, they could really pump things up as they would no longer be reliant on physical mechanisms.
Fir of all, if it is a Q3 release, my vacation at the end of Q2 beginning of Q3 will have to live with the 7D and 50D I currently own, and that sucks.
Secondly, if it is a Q2 announce and Q3 release, prototypes are not a word used at this point. There might be some firmware changes between cameras. But these would be Beta or pre-production cameras.
As far as problems writing to the CF cards, those issues should be long found in regression tests and such. I would hope. I would expect bugs will be a minimum, there will be some. But I would also expect any photographer to have a few 1000, or more exposures on any new camera before they head to the sporting event, no?
Like seriously, who would grab a new camera and the start taking event pictures, unless you absolutely had to??
I have been in production development for a while now, and unless Canon is an absolute broken mess of a large corporation, I would expect there is significantly less risk with than some of y'all think. I have to expect these cameras have already been vibe-table tested with accelerated aging tests, temp testing for both environmental use, but again accelerated aging tests, regressions tests, life tests and so on.
Don't forget that CFast is Canon's preferred card format that they've been publicly backing - they'd be crazy to suddenly use XQD, especially since Nikon only has one camera that supports XQD so far, but Alexa is already supporting CFast via standard upgrades for most of their cinema cameras.
If they're giving it out to pros, it'll be CFast. Or XQD. I haven't really looked at which one is superior, if either one really is. XQD is based on PCI-Express, while CFast is based on SATA. Either way, while they both support extremely high max speeds, those speeds will only be reached by very few cards, if ever. Until we get new technologies past flash memory. It's getting harder and harder to boost flash speeds, especially in such a fairly small & confined space. With current top end cards just starting to hit UDMA7 max speeds, XQD/CFast support is definitely needed on the next generation of pro cameras.
So it won't work with existing CF cards, might as well throw all of my existing CF cards in the garbage if they change it.I'm selling my collection of thirteen CF cards of 2GB or larger. Sold three and and pre-sold five. The rest I need to look for as they are scattered in the house.
Not everyone visit CR every day folks. A reminder is always welcome. It got me to check on the shutter life of my 4 bodies.This is another useless CR1 7D2 thread to add to the already existing ones...
I wasn't thinking quite that harshly but I was thinking along the same lines. Nothing new people, just another "look 7D2" moment lol