burst/buffer on 5D mk IV only getting 12 shots raw+jpg

I have noticed that my 90D gets a burst of 25 with RAW+JPG and 37 with CRAW+JPG that is 2-3 seconds for the buffer to fill
my 7DII gets 20 RAW+JPG before the buffer fills (2 seconds)

my 5DIV gets 13-14 RAW+JPG that is also about 2 seconds. RAW only gets 15 shots before buffer fills

is this about right for buffer sizes?


Even when trying to do selective bursts when there is a lot of activity with the birds I often fill the buffer and miss shots. I am tempted to try a few outings with JPG only for the unlimited burts

At least you can avoid the RAW+jpeg configuration, since when taking photos of birds, I can't imagine that you are in too much of a rush to get the pictures delivered. Then you can create the jpges when you come back home. Even as a batch processing job, if you want them the same way as the camera would have done them (i.e. with the same setting for all images).

I don't have any of your camera models, so I can't comment on the timing.

Specifically, what card (model/model/write speed) are you using in each of the three cameras?

All Sandisk cards

I get
5DIV 14 in a burst maybe 1 more than both
CF card is Extreme Pro 160 mbs and SD card is Extreme Pro 300 mbs when I shoot with just SD (300 MBS) I still get 13 shots R&J before buffer fills when RAW only I get 15 to fill the buffer.

7DII CF is Extreme 120 MBs and SD is Extreme Pro 95 MBs when I put the Extreme Pro 300 mbs in the 7DII I get 20 R&J and 29 with just RAW

On my Sandisk 300 mbs it doesn't give write speed

would upgrading to a 525 mbs (400 write) make a difference? the fastest CF I can see is 160.

john crossley wrote in post #19136157
I don't see what your problem is.


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Thank you John, I am running within specs. I guess I didn't do enough research.

Jeff USN Photog 72-76 wrote in post #19136151
All Sandisk cards

I get
5DIV 14 in a burst maybe 1 more than both
CF card is Extreme Pro 160 mbs and SD card is Extreme Pro 300 mbs when I shoot with just SD (300 MBS) I still get 13 shots R&J before buffer fills when RAW only I get 15 to fill the buffer.

7DII CF is Extreme 120 MBs and SD is Extreme Pro 95 MBs when I put the Extreme Pro 300 mbs in the 7DII I get 20 R&J and 29 with just RAW

On my Sandisk 300 mbs it doesn't give write speed

would upgrading to a 525 mbs (400 write) make a difference? the fastest CF I can see is 160.

A few years ago there was a lot of chatter on POTN about in camera bus speeds. Namely that if you insert a fast CF card and a slow SD card the transfer rate was limited to the speed of the SD card. So, quick experiment - remove the SD card. If there is no change then try raw only to CF card.

AFAIK this has been fixed but it takes 15 seconds to pop the SD card out.

Rod

I think it is the buffer size I just finished trying different cards in each camera.

CF 120 and 170

SD 95 and 300

and I get the same number of shots in each regardless card speed (whether 95 or 300)so I think it is limited by the buffer. Now I didn't benchmark which recovered faster, may play with that next

Its all about the cards. Buy the fastest and the best if your concerned about FPS on a 5D4

This is why canon makes the 1Dx series

Yup, I have 300 mbs for the SD and 160 for the CF both Pro Extreme.


Even on the R5 I have heard the real FPS is 8. but I am more interested in buffer size than speed, the 7 fps on the 5DIV and the 10 FPS on the 90D and 7DII are fine It is just that the buffer seems to fill quick.

I tested the 5DIV just now and got 15 on the CF and 16 on the SD before it filled the buffer.

If they made a 1Dx with a 30 mp sensor I would buy it for the huge buffer.

I just have to keep anticipating action instead of spray and pray

Just did another test this time between CF and SD on the 5DIV

with lens cap on, 1/8000 f/3.5 wide open and ISO 100 RAW+JPG (Large fine)

CF 170 mbs got 23 in the burst
SD 300 mbs got 20 in the burst

SO I guess I have nothing to complain about.

Jeff USN Photog 72-76 wrote in post #19136501
I think it is the buffer size I just finished trying different cards in each camera.

CF 120 and 170

SD 95 and 300

and I get the same number of shots in each regardless card speed (whether 95 or 300)so I think it is limited by the buffer. Now I didn't benchmark which recovered faster, may play with that next

The 5DIV SD slot is UHS-1.
Your 95MB/S card is UHS-1. (see the single row of contacts)
Your 300MB/S card is UHS-II. (see the two rows of contacts)

It is often found that UHS-II cards perform worse in the 5DIV compared to UHS-1 cards.
So it seems you are lucky that your UHS-II card performs well.

The 90D has a UHS-II SD slot. That's where you should use your UHS-II card.

It is NOT all about bus speeds,. or card speeds. (generically speaking, it varies from one model to another)

It's also about internal processing power. By adding in the jpeg, the camera also needs to process those jpegs before they get stored. this is part of why shooting raw (large file sizes) and jpeg (small files, but need more processing in camera) has such a huge toll on speed.

Choderboy wrote in post #19136767
The 5DIV SD slot is UHS-1.
Your 95MB/S card is UHS-1. (see the single row of contacts)
Your 300MB/S card is UHS-II. (see the two rows of contacts)

It is often found that UHS-II cards perform worse in the 5DIV compared to UHS-1 cards.
So it seems you are lucky that your UHS-II card performs well.

The 90D has a UHS-II SD slot. That's where you should use your UHS-II card.

Here are my latest tests this morning. Fresh batteries.

5DIV UHS-II 300 mbs 1/1000 f/7.1 ISO 400 Raw only 25 to buffer full Raw + Large Fine JPG 15 to buffer full
UHS-I 170 mbs 1/1000 f/7.1 ISO 400 Raw only 25 to buffer full Raw + Large Fine JPG 16 to buffer full

No real difference between the two UHS-1 vs UHS-II at least in my test

on the other hand the 90D is a speed and buffer demon

90D UHS-1 170 mbs 1/1000 f/7.1 ISO 400 Raw only 31 to buffer full Raw + Large Fine JPG 30 to buffer full
UHS-II 300 mbs 1/1000 f/7.1 ISO 400 Raw only 35 to buffer full Raw + Large Fine JPG 32 to buffer full

but with CRaw - wowzers

90D UHS-1 170 mbs 1/1000 f/7.1 ISO 400 CRaw only 57 to buffer full CRaw + Large Fine JPG 55 to buffer full
UHS-II 300 mbs 1/1000 f/7.1 ISO 400 CRaw only 65 to buffer full CRaw + Large Fine JPG 63 to buffer full

With CRaw the 90D can crank them out

both cameras give a slightly bigger buffer with RAW only, the 5DIV give quite a bit more!

WHY DO I SHOOT RAW+Large Fine JPG? It is due to my either laziness or habit. I go through the JPG's and find I can check focus on them a lot easier and faster since you can zoom in on the JPG with the mouse wheel.

With the RAW image at least on my machine (Win10) I have to go to the top of the window and move the mouse to the top of the window click on the magnifying glass and then drag the slider to zoom in, then can delete image or if I want to move to the next image I have to slide the slider back to minimum and then click on advance, it is much slower.

However I don't shoot on a time crunch and often don't get to the shots until the next day.

Since I switch cameras all the time maybe I should just shoot raw, it would also same 8 meg per image with no jpg.

what do you guys think?

Raw files aren't the same size, more detail or more noise equals larger raw files. Just an FYI.

Yes the 5d4 has a slower burst and shorter buffer, all you can do is put the fastest card in it as has been determined by testing by third party.