News S1Rii - Read all about it!

[Quentinquirelino]

An interesting burst mode comparison/test from Richard:

The prores raw format, that the S1R records internally has a Bitrate of about 1.5 Gbps, so the camera should be capable of high writing speeds. Theoretically it should be possible to use this capabilities in burst mode. The RAW files of the S1RII are between 50 and 65 MB, jpeg about 20 MB. That means between 15 and 20 fps should be possible with constant writing to the CF Express card. Or did I get something wrong?

 

[Pete_W]

Haven't watched the whole video yet (need to get to work!) but Tyler puts this comparison up right at the start of the video:

 

[AlanC]

The prores raw format, that the S1R records internally has a Bitrate of about 1.5 Gbps, so the camera should be capable of high writing speeds. Theoretically it should be possible to use this capabilities in burst mode. The RAW files of the S1RII are between 50 and 65 MB, jpeg about 20 MB. That means between 15 and 20 fps should be possible with constant writing to the CF Express card. Or did I get something wrong?

1.5Gbps (gigabits per second) is 187.5MB/s (megabytes per second) so if the RAWs were about 60MB each it'd take 22.4 seconds to write 70 of them at that rate, which is in line with Richard's results. Since the card is labelled as being capable of a sustained write of 850MB/s it looks like the limitation is in the camera.

 

[RuleOfThirds]

I didn’t watch the videos, but just looked at the sample gallery from dpreview and I must say that the 20-60 performed quite good with high resolution. At least while watching on my iPad.

 

[Quentinquirelino]

1.5Gbps (gigabits per second) is 187.5MB/s (megabytes per second) so if the RAWs were about 60MB each it'd take 22.4 seconds to write 70 of them at that rate, which is in line with Richard's results. Since the card is labelled as being capable of a sustained write of 850MB/s it looks like the limitation is in the camera.

Thanks for clarifying.

Ironically, I did a second mistake. I also confused ProRes 422 HQ for ProRes RAW HQ. The Bitrate for ProRes RAW HQ in the S1RII goes up to 4.2 Gbps(according to cined.com) what would be about 560 MB/s. So it should take less than 10 seconds for writing 70 RAW files or it should be possible to instantly writing up to 9-10 fps on the card. Maybe more. It still looks like software limitation, that could possibly get improved.

 

[CharlesH]

I didn’t watch the videos, but just looked at the sample gallery from dpreview and I must say that the 20-60 performed quite good with high resolution. At least while watching on my iPad.

I downloaded the dpreview raws and have been lookig at them with FastRawViewer, where you can blow them up. There is a 20-60mm picture of a bus, a white and cyan colored bus, that is especially sharp. It looks like the 20-60 might work well with S1Rii. By the way, there are a couple of 'hi rez" photos in the dpreview photos, and they are both very poor, not sharp when blown up. I don't know if the issue is the camera or the lens or the operator.

 

[Richard Wong]

I am impressed by your review of the S1Rii, Richard. I was so impressed that YouTube's algorithm thought I might be interested in seeing your other review in the Cantonese language:


I'm doubly impressed

haha if you watch it, you can learn some Cantonese as well

 

[Richard Wong]

As i said in my review, when shooting pre-burst, the time to write the buffer to card, no matter you use v90 SD or CFEB 4.0 card, no matter you choose RAW or JPG format are all almost the same. It suggest the bottleneck is at the processing pipeline.

However if you use a slow card like a v30 SD,, then your write time would go up dramatically!