K3 Exposure Compensation Setting

Bigdomino · 04-21-2014, 02:44 PM

Went out and took some RAW images the other day. They appeared very dark. Images did not look right. I did make some changes in Aperture and that helped.

I checked the exposure compensation setting. I usually have it set on bright. It was set on Bleach Bypass. Does anyone know what this is? What impact it has on an image?

Thanks.

Steve

Adam · 04-21-2014, 02:51 PM

Originally posted by Bigdomino

I checked the exposure compensation setting. I usually have it set on bright. It was set on Bleach Bypass. Does anyone know what this is? What impact it has on an image?

That's not exposure compensation, but rather the custom image setting. Anyway, bleach bypass will give you some crazy JPEG effect that's almost never useful. It shouldn't have an impact on the RAW data, but JPEG files and possible RAW previews would end up looking funny.

Take a look at the "JPEG Image Engine" category on this page to see what bleach bypass does compared to the other settings:
Pentax K-50 Review - Image Quality - Pentax Camera Forums

Bigdomino · 04-21-2014, 02:56 PM

Adam, thanks. The images with Bleach Bypass in the example you sent me look like mine. I do shoot DNG. So does the custom image settings have any impact on DNG/RAW?

Steve

**jatrax** · 04-21-2014, 04:10 PM

Possibly on the preview not on the dng itself.

awaldram · 04-22-2014, 03:40 AM

Originally posted by Bigdomino

Adam, thanks. The images with Bleach Bypass in the example you sent me look like mine. I do shoot DNG. So does the custom image settings have any impact on DNG/RAW?

Steve

Depends on how you process the RAW, If you use a Pentax converter at default it will obey the 'camera settings' so process the RAW with 'Bleach Bypass' enabled.

If you use a converter that does not understand 'Pentax profiles' then you will get a correct JPeg.

In summary the DNG is clean but carries directives to process as Bleach Bypass in the manufacturer field withn the Exif data.

Bigdomino · 04-22-2014, 06:15 AM

Originally posted by awaldram

Depends on how you process the RAW, If you use a Pentax converter at default it will obey the 'camera settings' so process the RAW with 'Bleach Bypass' enabled.

If you use a converter that does not understand 'Pentax profiles' then you will get a correct JPeg.

In summary the DNG is clean but carries directives to process as Bleach Bypass in the manufacturer field withn the Exif data.

I load the dng files directly into Aperture. No external converter is used.

Steve

04-21-2014, 02:44 PM	#1
Bigdomino Senior Member Join Date: Jan 2014 Location: Wells, Maine Posts: 107	K3 Exposure Compensation Setting Went out and took some RAW images the other day. They appeared very dark. Images did not look right. I did make some changes in Aperture and that helped. I checked the exposure compensation setting. I usually have it set on bright. It was set on Bleach Bypass. Does anyone know what this is? What impact it has on an image? Thanks. Steve

04-21-2014, 02:51 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,597	Originally posted by Bigdomino I checked the exposure compensation setting. I usually have it set on bright. It was set on Bleach Bypass. Does anyone know what this is? What impact it has on an image? That's not exposure compensation, but rather the custom image setting. Anyway, bleach bypass will give you some crazy JPEG effect that's almost never useful. It shouldn't have an impact on the RAW data, but JPEG files and possible RAW previews would end up looking funny. Take a look at the "JPEG Image Engine" category on this page to see what bleach bypass does compared to the other settings: Pentax K-50 Review - Image Quality - Pentax Camera Forums Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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04-21-2014, 02:56 PM	#3
Bigdomino Senior Member Join Date: Jan 2014 Location: Wells, Maine Posts: 107 Original Poster	Adam, thanks. The images with Bleach Bypass in the example you sent me look like mine. I do shoot DNG. So does the custom image settings have any impact on DNG/RAW? Steve

04-21-2014, 04:10 PM	#4
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Possibly on the preview not on the dng itself.

04-22-2014, 03:40 AM	#5
awaldram Veteran Member Join Date: May 2008 Location: Hampshire Photos: Gallery Posts: 732	Originally posted by Bigdomino Adam, thanks. The images with Bleach Bypass in the example you sent me look like mine. I do shoot DNG. So does the custom image settings have any impact on DNG/RAW? Steve Depends on how you process the RAW, If you use a Pentax converter at default it will obey the 'camera settings' so process the RAW with 'Bleach Bypass' enabled. If you use a converter that does not understand 'Pentax profiles' then you will get a correct JPeg. In summary the DNG is clean but carries directives to process as Bleach Bypass in the manufacturer field withn the Exif data.

04-22-2014, 06:15 AM	#6
Bigdomino Senior Member Join Date: Jan 2014 Location: Wells, Maine Posts: 107 Original Poster	Originally posted by awaldram Depends on how you process the RAW, If you use a Pentax converter at default it will obey the 'camera settings' so process the RAW with 'Bleach Bypass' enabled. If you use a converter that does not understand 'Pentax profiles' then you will get a correct JPeg. In summary the DNG is clean but carries directives to process as Bleach Bypass in the manufacturer field withn the Exif data. I load the dng files directly into Aperture. No external converter is used. Steve