Pocket Cinema Camera Low Light ISO and Storage Tests

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Sareesh Sudhakaran

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Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 8:50 am

Here you go, two more tests. First up, comparing the camera to the Panasonic GH5:



The low light performance is close to the GH5. The GH5s will do better.

And here's the media card test:

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rick.lang

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 2:17 pm

Thanks for the additional tests, Sareesh. I’m considering the new Wise Portable SSD which has a top capacity of 1TB. That drive is scheduled for an October release. I believe it has been designed with video recording in mind, so will be most interesting to see if that can cope with 4K or UHD at 48/50/60 fps CinenaDNG lossless raw.

I’m not aware of a published sustained Write speed for the Samsung T5, but I think the new Wise is 520 MB/s. Depending upon the complexity of the scene, that may work. It shouldn’t be expected to work for a complex scene looking at the numbers. But a real test will be required.


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David Chapman

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 3:31 pm

I appreciate the time taken here, but I can’t decipher what is YouTube compression blocking and what’s noise in the image. Without seeing high res Stills of each it’s impossible to make any decisions as to how each look.
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Sareesh Sudhakaran

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 3:39 pm

rick.lang wrote:I’m not aware of a published sustained Write speed for the Samsung T5, but I think the new Wise is 520 MB/s. Depending upon the complexity of the scene, that may work. It shouldn’t be expected to work for a complex scene looking at the numbers. But a real test will be required.


As per the published specs the data rate should be 544 MB/s in 60p. It would be hard for any SSD to hit those speeds (real-world sequential write).

M.2 with a USB 3.1 enclosure might work, but the power draw is a huge concern. Whether it's practical or not remains to be seen.

Blackmagic RAW can't come soon enough IMO!
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Sareesh Sudhakaran

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 3:43 pm

David Chapman wrote:I appreciate the time taken here, but I can’t decipher what is YouTube compression blocking and what’s noise in the image. Without seeing high res Stills of each it’s impossible to make any decisions as to how each look.


The biggest surprise for me is ISO 1250 is cleaner than 2000, and 2000 is cleaner than 3200 ISO. That's strange for a camera rated for 3200 ISO. This is on Resolve Studio 15.1, updated to read dual ISOs and debayer accordingly.

ISOs 100 to 400 are fantastic. As per the published manual the camera has a 13 stop DR within these ISOs. Drops by half a stop at higher ISOs.

Really great performance overall. Top of its class, and the next.

Here's a Vimeo version if it helps:

https://wolfcrow.com
https://youtube.com/wolfcrow
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Ryan Humphrey

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 5:23 pm

Any chance you would switch the Vimeo options to let us download the original file you uploaded? It would be great to see this without any added compression. A really nice real-world kind of deliverable.
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rick.lang

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 5:33 pm

David Chapman wrote:I appreciate the time taken here, but I can’t decipher what is YouTube compression blocking and what’s noise in the image. Without seeing high res Stills of each it’s impossible to make any decisions as to how each look.


With the option of taking single-frame CinemaDNG frames on the URSA Mini Pro and the BMPCC4K, it would be sweet if BMD could permit in-line viewing of 4K stills here rather than having to use an intermediary like DropBox. Right now, the maximum file size for uploads is two restrictive for that.


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rick.lang

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostThu Sep 27, 2018 5:36 pm

Sareesh, published specs assume a fairly complex image and data rates for raw vary with complexity. In practice for many purposes it may work on an SSD. Just speculating but I’ll look forward to trying it. Uncompressed raw may be too much, but one of the compressed CNG codecs may be good.


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Sareesh Sudhakaran

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Re: Pocket Cinema Camera Low Light ISO and Storage Tests

PostFri Sep 28, 2018 1:52 am

Ryan Humphrey wrote:Any chance you would switch the Vimeo options to let us download the original file you uploaded? It would be great to see this without any added compression. A really nice real-world kind of deliverable.


Done! It should be available now.
https://wolfcrow.com
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