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The Canon EOS R5 will have an SD & CFExpress slot [CR2]

Absolutely Amazing! Specially since read speed on UHS II maxes out at 300 mb/sec and write speeds are always lower. Hypothetical max transfer speed on UHS II is 312 mb/sec. Your Canon R must have been sprinkled with some magic Pixy Dust!
Wow, Id love to know what UHS-II card you have as my Sandisk is registered with a max 260mb/sec used in an EOS R?
 
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Just a thought. If the write speed on a CFE card is so much higher why not duplicate from the CFE->SD card AFTER the shot burst vs. dual write? This would ensure data redundancy across two cards and at the same time not cripple the FPS. If a user chooses to only have an SD as primary then this function would be disabled.
 
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Just had a look at CFE prices and holy sh!t, so a 256gb costs half of a brand new R, pretty shocking....
Kinda catches you in the boo boo, don't it? ;) Glad that camera is just a twinkle in my eye right now. I would never need more than 32gb, maybe 64gb. The video, sports and wildlife guys are going to feel a sting. 128gb are going for $199 at Adorama. 1TB for $899 I think.
 
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Kinda catches you in the boo boo, don't it? ;) Glad that camera is just a twinkle in my eye right now. I would never need more than 32gb, maybe 64gb. The video, sports and wildlife guys are going to feel a sting. 128gb are going for $199 at Adorama. 1TB for $899 I think.

Yeah, I really want to know what those R5 file sizes are going to be like. I'm shooting a lot of JPG right now with my RP (partly because there are no camera-matching RAW profiles in Lightroom), so this is rarely an issue, but I think I may need to upgrade to 64 or 128 GB cards when I have a camera with over 40 MP.
 
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If the camera has a high speed usb-c port they could also allow an external SSD as a recording option. BlackMagic Design‘s newer Pocket Cinema cameras have this option so it’s not out of the question if they are on Canon’s radar.
 
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I was talking about the MAX Speed of UHSII cards, not necessarily in the R. As far as max read speed of 300 mb/sec look at https://www.bhphotovideo.com/c/prod...ces_ddsdg2000128_128gb_sdxc_2000x_memory.html
yup, the max speed of the Sandisk Extreme Pro 64GB read speed is up to 300mb/s and write speed of 260mb/s which is the important one as that is what determines how fast the buffer fills up. Thats why I was asking what card you have as 400mb/s is incredibly fast for a UHSII card
 
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Just had a look at CFE prices and holy sh!t, so a 256gb costs half of a brand new R, pretty shocking....

Hope you are being sarcastic. If not, in the USA 256gb CFE is starting at $280 (Prograde) and $400 for a 256gb Sandisk extreme pro. In comparison a 256GB SD UHS--II V90 rated card is costing $330 and up. of course if you were to buy a V60 or less rated card the price is less than half of the above said prices.
Above Prices I found today at bandh.com
 
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Yeah, I really want to know what those R5 file sizes are going to be like. I'm shooting a lot of JPG right now with my RP (partly because there are no camera-matching RAW profiles in Lightroom), so this is rarely an issue, but I think I may need to upgrade to 64 or 128 GB cards when I have a camera with over 40 MP.
Hasn't LR had RP RAW profiles since 12/2019?
 
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