OK, I'm loving the 15 fps mechanical frame rate of the R7. One question:
I recently worked an event where I wanted to be absolutely sure I had all the images, so I delved into the menus and set it up to record to both SD slots. Each had a SanDisk Ultra 150 mb/s 256Gb card.
It was a noisy venue, but I had the impression that it wasn't delivering at 15 fps. Full sun, relatively high ISO to give me a super-quick shutter speed, so that wasn't it.
Does recording to two cards simultaneously slow things down? Poring over the online owner's manual was no help. (But then, they rarely have been, in my experience.)
Frame rate will drop off as battery depletes -- true of any R camera capable of mid to high FPS. I don't know when you experienced the drop off -- entire or part of the shoot -- but generally once a battery is 50% 15 FPS isn't happening.
I doubt it's your card, as said that should only affect buffer. But when I had an R7 I did find V90 cards much more palatable than slower ones when shooting high FPS, but all that did was delay the buffer fill for a few more seconds.
Hairy Heron wrote:
Frame rate will drop off as battery depletes -- true of any R camera capable of mid to high FPS. I don't know when you experienced the drop off -- entire or part of the shoot -- but generally once a battery is 50% 15 FPS isn't happening.
I doubt it's your card, as said that should only affect buffer. But when I had an R7 I did find V90 cards much more palatable than slower ones when shooting high FPS, but all that did was delay the buffer fill for a few more seconds.
That would be for MS/EFCS though. In most cameras the rate in ES mode does not change unless the battery is very low if at all.
The Sony Type G SDxC cards have worked well for me in the R7, at least as fast as most half duplex UHS-II cards get. The "R7 II" deserves a CFe B or CFe A slot.
Your Card has Minimum Write speed of 10 MB/s
Maximum Read speed is 150MB/s but has nothing to do with shooting.
A V90 UHS-II SD has a minimum write speed of 90MB/s
A V60 UHS-II SD has a minimum write speed of 60MB/s
A V30 UHS-I SD has a minimum write speed of 30MB/s
Your Card is very, very slow.
You should at least get a V60 card.
R7 User Manual states Large JPG approx Size 10.6 MB.
So a quick burst of half a second, followed 2 seconds later by another half second burst would be approx 15 files = 159MB.
The 2 bursts took 3 seconds. Assume your card achieves double the minimum 10MB/s and 100MB still needs to be written which will take another 5 seconds, at double the minimum 10MB/s specification.
Hold the shutter button down for a full second and 159MB is created and if the card only achieves minimum write speed spec of 10MB/s, another 149MB needs to be written, taking another 14.9 seconds.
A V60 card, for the same scenario, will have 99MB remaining to be written after the 1 second burst, taking less than 2 seconds, at the minimum write spec.
For the first scenario, 15 photos in 2 bursts over 3 seconds, creating the same 159MB, the V60 card would have less than half a second of writing to do after the 2nd burst was completed, at the minimum write spec.
As others have noted, the R7 buffer is pretty shallow, especially when shooting RAW.
This site has some data to show you what you can expect with different classes of memory cards from different brands (not quite comparable to the OP question unfortunately as it is based on electronic shutter): https://rfshooters.com/blog/cameras/canon-r7/memory-cards/
I tested the new card, a Transcend UHS-II SD 700C 64g. Read up to 285 MB/s it says.
Nothing highly technical, just set the body to manual focus, manual exposure, a high shutter speed (1/1000) and the lens wide open, large fine jpeg.
Set to high frame rate, and hold the shutter button down for ten seconds by my watch. Hmmm. 95-100 frames. Mechanical shutter, electronic electronic 1st, doesn't matter.
OK, Try the old cards, the SanDisk Ultra 150 MB/s. Same thing. Use trwo cards and write to both. Same-same.
Grrr. Dig out the never-failed 7DII, and with the same cards, it delivers 100 frames in 10 seconds like clockwork.
Where did my promised 15 fps on the R7 get to?
And no, I never hit the buffer slow-down barrier. The SanDisk cards did take longer to finish writing to the card, but the fps never changed.
The H and H+ drive modes are available on the EOS R7 when it is in mechanical shutter mode. There are a few things that the camera needs to use the H+ mode. Those are listed on the manual page HERE and I've included them below as well:
H+ enables approx. 15 shots/sec. continuous shooting speed when set to [Elec. 1st-curtain] or [Mechanical] under these conditions.
Room temperature (23°C/73°F)
Using any of the following power sources
Fully charged LP-E6NH (note that continuous shooting speed may become slower when using batteries with weak recharge performance) Household power outlet accessories (sold separately)
USB power adapters (sold separately)
Shutter speed: 1/1000 sec. or faster
Flicker reduction: None
There's two gotchas in there I see, one is flicker reduction, the other is batteries with weak recharge performance. I'm guessing that means if you have a battery that only gets like 1 of the 3 bars it might not be able to do the full 15fps.
I'm getting 15FPS in [H+] with an NH that has one red square. Make sure you use an RF lens or no lens.
In case you are using an LP-E6P check if the R7 has FW 1.50 or older since it it will treat an LP-E6P like an LP-E6N and be slow in MS and ECFS. The R7 should be updated to 1.60 or later to work at full speed with the LP-E6P.
ptys wrote:
Wouldn't the card speed matter only when you are clearing the buffer?
That is correct. I tested the R7 with an ancient 16GB SD card (pre-UHS I even) and it still does 15FPS mechanical, but the buffer requires about 50 seconds to clear. The camera is not able to capture any images or review for most of that.
OK, somehow the R7 got an old LP-E6 in it., so that might be part of the problem. I'll track down the two correct batteries I have in inventory and try again.
Yes, the flicker reduciton was off.
The lens was my much-loved EF-S 15-85. If that's a hindrance than I'm really going to be unhappy, as that lens is my workhorse. And there is no R replacement for it.
OK, mystery solved. I dug out an LP-E6NH (the one that came with the R7) and at 73% charge, it ripped off 151 shots in 10 seconds. There was a slight slowdown at the 7-8 second mark, but just a short blip of it.
This, with the 15-85, Manual, 1/1000 sec and autofocus turned off. Flicker turned off as well.
