Call for help - building sensor readout speed database

well69
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p.7 #1 · p.7 #1 · Call for help - building sensor readout speed database

Snapsy, or anyone else: any chance of unlocking more buffer in the R8?

And, since I'm asking the guys that know things: would I see any improvement in buffer clearing by using a v60 or v90 sd card instead of a v30?

May 02, 2024 at 09:36 AM

snapsy
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p.7 #2 · p.7 #2 · Call for help - building sensor readout speed database

well69 wrote:
Snapsy, or anyone else: any chance of unlocking more buffer in the R8?

And, since I'm asking the guys that know things: would I see any improvement in buffer clearing by using a v60 or v90 sd card instead of a v30?

Buffer clearing is most often limited by ASIC processing speed rather than card throughput. Here's a link to my deep dive into the original Nikon Z6/Z7 detailing why this is the case:

Deep dive into Z XQD vs CFE performance: Major Findings and Conclusions

So there's a chance Canon is throttling DIGIC performance on the R8. It's also possible the R8 has less frame SDRAM for frame buffers.

May 02, 2024 at 10:39 AM

snapsy
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p.7 #3 · p.7 #3 · Call for help - building sensor readout speed database

I've just published a YouTube video that walks through my Nikon Z6 III sensor readout measurements. It also provides some background information about the rolling shutter project.

Jul 03, 2024 at 11:57 AM

koenkooi
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p.7 #4 · p.7 #4 · Call for help - building sensor readout speed database

well69 wrote:
Snapsy, or anyone else: any chance of unlocking more buffer in the R8?

And, since I'm asking the guys that know things: would I see any improvement in buffer clearing by using a v60 or v90 sd card instead of a v30?

I saw much better overall buffer performance with fast cards, ones that advertise 250MB/s or better write speeds as well as V90 certification. Having said that, Canons way of clearing buffers awful, regardless of card speed. Buffer fills, lock up the camera for multiple seconds, short burst at full fps, lock up the camera for multiple seconds, short burst at full fps....

On my R8 I use CRAW and only use H+ when I think I need it, otherwise it's set to H. Almost always using ES, so H will be 20fps.

Jul 04, 2024 at 02:47 AM

tommmi
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p.7 #5 · p.7 #5 · Call for help - building sensor readout speed database

Curious to see the led photo when using Hasselblad leaf shutter lenses. Basically the lens acts like "global shutter" but the sensor in the camera is still "rolling" ?

Jul 09, 2024 at 04:42 AM

snapsy
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p.7 #6 · p.7 #6 · Call for help - building sensor readout speed database

tommmi wrote:
Curious to see the led photo when using Hasselblad leaf shutter lenses. Basically the lens acts like "global shutter" but the sensor in the camera is still "rolling" ?

I've tried the leaf shutter in the Ricoh GR III. It yields the same result as a global shutter.

Jul 09, 2024 at 04:53 AM

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