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Archive 2023 · R50 buffer clear speed?

  
 
robsuh
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p.1 #1 · R50 buffer clear speed?


Hello,

Anyone have an R50 and knows how quickly it can dump the buffer to the SD card when shooting RAW+jpeg?

I had the SL2 years ago and the only thing I hated about it was the slow fps and the really slow buffer clear speed.

Looks like the R50 fixed the fps issue, but I have concerns on how quickly it can dump out images to make it usable again. I was always missing shots with the SL2 because the camera locks up while writing out to the SD card.

I'm okay shooting in the Low-speed mode (3fps), but would like the camera to not lock up during normal usage (non-sports.)

the-digital-picture says that it has a 7 frame RAW buffer and 15 frames with compressed RAW. Compressed RAW seems like the ticket.

I have other bodies, but looking at a r50+24mm 1.8 combo for a lightweight option.

On a side note, I find it insane that the AF on the r50 is basically the same as the r3. Wasn't that long ago when the low end bodies had that geriatric 9 point AF with only one cross point.



Jun 06, 2023 at 06:38 PM
bman212121
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p.1 #2 · R50 buffer clear speed?


Looking at the spec sheet it still only supports UHS-I SD cards. So that means somewhere around 70MBps write speed to the best cards.

The CRAW is under 20MB, then throw in another 5 or maybe a bit more for a JPG. So realistically you're looking at about 3fps at most would be written to the card. (Probably more like 2.5)

So if you did 3fps mode I'd imagine you could go for plenty long enough before you ran out of space. The higher speed mode would just stack up images so fast it would drop down to around 3fps after a second or so.

Doing some eyeballing of the SL2 on TDP, I would imagine the SL2 is capable of delivering full UHS-I speeds. It's writing at least 60MBps in this tests if you figure it's doing 2 30MB raw per second. So I don't think the R50 will do much better in that regard. All of your advantage is going to come from the CRAW format. The CRAW is half the size, but the JPG isn't, so the scaling is probably something like 2/3 faster write out overall. That might be all you need to reach your goal.

The other option would be to step up to an R10, which supports UHS-II cards. It looks like that camera can do hundreds of CRAW before it slows down because of the increased buffer size and the faster card writes.



Jun 07, 2023 at 10:37 PM
AmbientMike
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p.1 #3 · R50 buffer clear speed?


The 5 or so shot raw buffer in the SL2 isn't real fun but I don't remember it locking up unless 0 left and it had to clear up some room. Raw + jpeg slows it down even more even just shooting raw helps. Old cards can be really bad, one class 10 really took a while in 18mp on raw, but even newer name brand micro SD generally aren't bad.

Kinda funny though, the jpeg buffer is limitless or close on some of these. Seems like DPR filled up a card and didn't get to the buffer limit on one. Shot a lot of jpegs the the last 1.5 years or so, so the buffer not really a problem. Shooting jpegs might be one way around it in the r50.



Jun 07, 2023 at 11:53 PM
robsuh
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p.1 #4 · R50 buffer clear speed?


Awesome, thanks for the analysis bman and Mike. It seems like it would be on par or not much different than what I experienced.

I'll try to check it out this weekend at the store.



Jun 08, 2023 at 04:39 PM
TeamSpeed
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p.1 #5 · R50 buffer clear speed?


Just like the R7, these crop R bodies have nice burst speeds, but you can barely get 1-2s worth of frames before you slow way down. It almost negates the improvement in burst speeds.


Jun 09, 2023 at 05:30 AM





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