12 Bits/Channel RAW files?

Sprags · 02-14-2008, 01:26 PM

When I open a *DNG file in Photoshop CS2 it shows that the Depth is 8 Bits/Channel. I though if I have the camera set for the highest quality image its supposed to be 12 Bits/Channel.

Is there a setting on the camera I need to change?

Thanks...Blake

bluespearbone · 02-14-2008, 01:48 PM

I think they are the settings on which it is going to import at, rather than the properties of the actual capture. You can change them to whatever constraints it has.

fwbigd · 02-14-2008, 02:29 PM

Originally posted by Sprags

When I open a *DNG file in Photoshop CS2 it shows that the Depth is 8 Bits/Channel. I though if I have the camera set for the highest quality image its supposed to be 12 Bits/Channel.

Is there a setting on the camera I need to change?

Thanks...Blake

The default edit mode for Photoshop CS2 is 8 Bits/Channel. This overides the camera setting to my knowledge. Photoshop CS2 does allows you to edit both JEPG and RAW in the 16Bits/Channel mode by going to the top line dropdown menu IMAGE>Mode>16Bits/Channel.

VR
Darryl

dave kitson · 02-14-2008, 02:38 PM

Originally posted by Sprags

When I open a *DNG file in Photoshop CS2 it shows that the Depth is 8 Bits/Channel. I though if I have the camera set for the highest quality image its supposed to be 12 Bits/Channel.

Is there a setting on the camera I need to change?

Thanks...Blake

You cannot set the bit-depth of a RAW file in the camera.

When you open a DNG file in CS2, ACR converts the 12bit RAW file to a regular image file. There is a user-settable "Depth" parameter in ACR which decides whether the output image file is 8bit or 16bit.

ACR either maps the 12bit RAW file into 8bits or pads it into 16bits as required.

Dave

jeffkrol · 02-14-2008, 03:19 PM

Originally posted by dave kitson

You cannot set the bit-depth of a RAW file in the camera.

When you open a DNG file in CS2, ACR converts the 12bit RAW file to a regular image file. There is a user-settable "Depth" parameter in ACR which decides whether the output image file is 8bit or 16bit.

ACR either maps the 12bit RAW file into 8bits or pads it into 16bits as required.

Dave

Nit to pick... Actually the image file is 15bit (if you pick 16bit), 1 bit for info ect...Not that it really matters but images are edited in 15bit............

Sprags · 02-14-2008, 04:58 PM

alrighty now i see...Sprags

dave kitson · 02-14-2008, 05:02 PM

Originally posted by jeffkrol

Nit to pick... Actually the image file is 15bit (if you pick 16bit), 1 bit for info ect...Not that it really matters but images are edited in 15bit............

You're right of course, I used lazy terminology

.

I guess the files should really be called 'signed 15bit' or something, rather than 16bit

dave

02-14-2008, 01:26 PM	#1
Sprags Inactive Account Join Date: Jan 2008 Location: Portland, Maine Posts: 218	12 Bits/Channel RAW files? When I open a *DNG file in Photoshop CS2 it shows that the Depth is 8 Bits/Channel. I though if I have the camera set for the highest quality image its supposed to be 12 Bits/Channel. Is there a setting on the camera I need to change? Thanks...Blake

02-14-2008, 05:02 PM	#7
dave kitson Veteran Member Join Date: Sep 2006 Location: Lichfield, UK Photos: Gallery \| Albums Posts: 486	Originally posted by jeffkrol Nit to pick... Actually the image file is 15bit (if you pick 16bit), 1 bit for info ect...Not that it really matters but images are edited in 15bit............ You're right of course, I used lazy terminology. I guess the files should really be called 'signed 15bit' or something, rather than 16bit dave

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02-14-2008, 01:48 PM	#2
bluespearbone Veteran Member Join Date: Jul 2007 Location: Derbyshire, United Kingdom Posts: 325	I think they are the settings on which it is going to import at, rather than the properties of the actual capture. You can change them to whatever constraints it has.

02-14-2008, 02:29 PM	#3
fwbigd Veteran Member Join Date: Jun 2007 Location: Fort Worth TX Posts: 339	Originally posted by Sprags When I open a *DNG file in Photoshop CS2 it shows that the Depth is 8 Bits/Channel. I though if I have the camera set for the highest quality image its supposed to be 12 Bits/Channel. Is there a setting on the camera I need to change? Thanks...Blake The default edit mode for Photoshop CS2 is 8 Bits/Channel. This overides the camera setting to my knowledge. Photoshop CS2 does allows you to edit both JEPG and RAW in the 16Bits/Channel mode by going to the top line dropdown menu IMAGE>Mode>16Bits/Channel. VR Darryl

02-14-2008, 02:38 PM	#4
dave kitson Veteran Member Join Date: Sep 2006 Location: Lichfield, UK Photos: Gallery \| Albums Posts: 486	Originally posted by Sprags When I open a *DNG file in Photoshop CS2 it shows that the Depth is 8 Bits/Channel. I though if I have the camera set for the highest quality image its supposed to be 12 Bits/Channel. Is there a setting on the camera I need to change? Thanks...Blake You cannot set the bit-depth of a RAW file in the camera. When you open a DNG file in CS2, ACR converts the 12bit RAW file to a regular image file. There is a user-settable "Depth" parameter in ACR which decides whether the output image file is 8bit or 16bit. ACR either maps the 12bit RAW file into 8bits or pads it into 16bits as required. Dave

02-14-2008, 03:19 PM	#5
jeffkrol Veteran Member Join Date: Sep 2006 Location: Wisconsin USA Photos: Gallery Posts: 8,434	Originally posted by dave kitson You cannot set the bit-depth of a RAW file in the camera. When you open a DNG file in CS2, ACR converts the 12bit RAW file to a regular image file. There is a user-settable "Depth" parameter in ACR which decides whether the output image file is 8bit or 16bit. ACR either maps the 12bit RAW file into 8bits or pads it into 16bits as required. Dave Nit to pick... Actually the image file is 15bit (if you pick 16bit), 1 bit for info ect...Not that it really matters but images are edited in 15bit............

02-14-2008, 04:58 PM	#6
Sprags Inactive Account Join Date: Jan 2008 Location: Portland, Maine Posts: 218 Original Poster	alrighty now i see...Sprags