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Rush2112 · 01-16-2009, 11:48 AM

Sorry all if this has specifically been addressed previously. I haven't done any testing to try to find the answer to this question so I thought I'd just rather ask.

The DR Expansion mode doesn't affect the raw file from what I can tell, and there isn't a way to carry those presets over into raw processing in CS2, does the Pentax software allow that? Also, does the Pentax software only process the native Pentax raw format, or will it do DNG as well? I haven't uploaded the software yet to find out, been too busy/lazy to do it yet.

Thanks in advance/sorry in advance,

Carl

Zebooka · 01-16-2009, 12:07 PM

Enlarged DR is just shooting with ISO -1EV and then applying curves for highlighting underexposured image.

Rush2112 · 01-16-2009, 01:04 PM

Yes, I understand how it works.

I was just curious if there was an automated "as shot" app. in the Pentax raw software. In otherwords, if there is and whether or not the adjustments will show on raw processing just as the jpeg does when you enable it.

C

PentaxPoke · 01-16-2009, 01:25 PM

Originally posted by Rush2112

The DR Expansion mode doesn't affect the raw file from what I can tell,

Carl

Yes it does affect the RAW file. That would be equivalent to saying that ISO does not affect the RAW file. "DR expansion" is an exposure mode, and as such, it affects the RAW file. It is not a post-processing mode like white balance for example.

The new version of the Pentax software does recognize in the EXIF if the DR was used or not. The primary use of this mode is to prevent or minimize highlight clipping. I never use it since Pentax DSLRS do such a good job of preventing highlight clipping in the first place. I am typically more concerned about shadow noise.

Last edited by PentaxPoke; 01-16-2009 at 01:34 PM.

mithrandir · 01-16-2009, 11:03 PM

Would seem to defeat the idea of ETTR (Expose to the Right).

Marc Sabatella · 01-16-2009, 11:35 PM

Originally posted by PentaxPoke

Yes it does affect the RAW file. That would be equivalent to saying that ISO does not affect the RAW file.

It may affect the RAW file, but it still may need support from the RAW processor to fully achieve the effect.

blende8 · 01-17-2009, 02:23 AM

I wrote something on D-Range here:

https://www.pentaxforums.com/forums/443429-post4.html

01-16-2009, 11:48 AM	#1
Rush2112 Veteran Member Join Date: Dec 2008 Location: RSM, CA Photos: Gallery Posts: 505	Dynamic Range Expansion mode Sorry all if this has specifically been addressed previously. I haven't done any testing to try to find the answer to this question so I thought I'd just rather ask. The DR Expansion mode doesn't affect the raw file from what I can tell, and there isn't a way to carry those presets over into raw processing in CS2, does the Pentax software allow that? Also, does the Pentax software only process the native Pentax raw format, or will it do DNG as well? I haven't uploaded the software yet to find out, been too busy/lazy to do it yet. Thanks in advance/sorry in advance, Carl

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01-16-2009, 12:07 PM	#2
Zebooka Veteran Member Join Date: May 2008 Location: Russia, Siberia, Novosibirsk Posts: 323	Enlarged DR is just shooting with ISO -1EV and then applying curves for highlighting underexposured image.

01-16-2009, 01:04 PM	#3
Rush2112 Veteran Member Join Date: Dec 2008 Location: RSM, CA Photos: Gallery Posts: 505 Original Poster	Yes, I understand how it works. I was just curious if there was an automated "as shot" app. in the Pentax raw software. In otherwords, if there is and whether or not the adjustments will show on raw processing just as the jpeg does when you enable it. C

01-16-2009, 01:25 PM	#4
PentaxPoke Veteran Member Join Date: Jan 2008 Location: Oklahoma Posts: 1,411	Originally posted by Rush2112 The DR Expansion mode doesn't affect the raw file from what I can tell, Carl Yes it does affect the RAW file. That would be equivalent to saying that ISO does not affect the RAW file. "DR expansion" is an exposure mode, and as such, it affects the RAW file. It is not a post-processing mode like white balance for example. The new version of the Pentax software does recognize in the EXIF if the DR was used or not. The primary use of this mode is to prevent or minimize highlight clipping. I never use it since Pentax DSLRS do such a good job of preventing highlight clipping in the first place. I am typically more concerned about shadow noise. Last edited by PentaxPoke; 01-16-2009 at 01:34 PM.

01-16-2009, 11:03 PM	#5
mithrandir Veteran Member Join Date: Nov 2007 Location: Maryland Photos: Gallery Posts: 1,895	Would seem to defeat the idea of ETTR (Expose to the Right).

01-16-2009, 11:35 PM	#6
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by PentaxPoke Yes it does affect the RAW file. That would be equivalent to saying that ISO does not affect the RAW file. It may affect the RAW file, but it still may need support from the RAW processor to fully achieve the effect.

01-17-2009, 02:23 AM	#7
blende8 Veteran Member Join Date: Feb 2007 Location: Bremen, Germany Photos: Albums Posts: 1,521	I wrote something on D-Range here: https://www.pentaxforums.com/forums/443429-post4.html

Dynamic Range Expansion mode

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