DPReview.com is closing April 10th - Find out more

GH4 shoots .RW2 format. Is RW2 4:4:4 chroma subsampling?

Started Jan 8, 2019 | Questions
eyeangle
eyeangle New Member • Posts: 20
GH4 shoots .RW2 format. Is RW2 4:4:4 chroma subsampling?

Is the RW2 format 4:4:4 and is it 16-bit? Is there a program out there that tells you these details of a photo?

 eyeangle's gear list:eyeangle's gear list
Voigtlander Nokton 42.5mm F0.95 Voigtlander Nokton 17.5mm F0.95 Aspherical Voigtlander Nokton 25mm F0.95 Type II Voigtlander 10.5mm F0.95 Nokton
ANSWER:
Panasonic Lumix DMC-GH4
If you believe there are incorrect tags, please send us this post using our feedback form.
amipal
amipal Senior Member • Posts: 1,275
Re: GH4 shoots .RW2 format. Is RW2 4:4:4 chroma subsampling?

IIRC, no m43 camera records a 16-bit RAW file.

I think most save to 12-bit at the most, with some cameras reducing that to 10-bit when using the electronic shutter.

Cheers,
Paul

 amipal's gear list:amipal's gear list
Panasonic Lumix DMC-GH4 Panasonic Lumix DMC-GM5 Panasonic Lumix DC-G9 Panasonic Lumix G 20mm F1.7 ASPH Panasonic Leica Summilux DG 25mm F1.4 +7 more
JakeJY Veteran Member • Posts: 5,442
Re: GH4 shoots .RW2 format. Is RW2 4:4:4 chroma subsampling?
1

In a raw format there is no traditional chroma subsampling going on as each "pixel" represents the a value at the site before demosaicing. There is no "color" yet in the traditional sense as you are used to.

Currently the max RAW bit depth Panasonic has is 12 bit, sometimes dropping to 10 bit when using electronic shutter.

For other formats, you may need to put it into a 16 bit container, since many times that is what you have to pick if you want more than just a 8 bit container.

 JakeJY's gear list:JakeJY's gear list
Nikon Coolpix S9300 Nikon D5000 Panasonic Lumix DMC-GX85 Nikon AF-S DX Nikkor 55-200mm f/4-5.6G VR Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G VR +6 more
selected answer This post was selected as the answer by the original poster.
Yoel Diamante New Member • Posts: 1
Re: GH4 shoots .RW2 format. Is RW2 4:4:4 chroma subsampling?

Hi there. Do you know bit depth and chroma subsampling of GH5’s raw stills?

JakeJY Veteran Member • Posts: 5,442
Re: GH4 shoots .RW2 format. Is RW2 4:4:4 chroma subsampling?

Yoel Diamante wrote:

Hi there. Do you know bit depth and chroma subsampling of GH5’s raw stills?

I already said it in the answer you quoted, it's 12-bit, there is no subsampling given it's RAW.

The only M43 Panasonic camera I'm aware of that has higher than 12-bit is the GH5S which has a 14-bit RAW mode.

https://www.dpreview.com/reviews/panasonic-lumix-dc-gh5s-review

 JakeJY's gear list:JakeJY's gear list
Nikon Coolpix S9300 Nikon D5000 Panasonic Lumix DMC-GX85 Nikon AF-S DX Nikkor 55-200mm f/4-5.6G VR Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G VR +6 more
Keyboard shortcuts:
FForum MMy threads