Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-05-2008, 08:58 PM   #1
Veteran Member
FHPhotographer's Avatar

Join Date: Jul 2008
Location: Fountain Hills, AZ
Photos: Gallery | Albums
Posts: 1,298
any idea what's causing this?

This was with a K100D, 43mm, f/4@1/500', RAW, ISO 200, AF and "daylight" WB. No correction in ACR or PS, just opened and converted to jpeg.

I've not seen this "edge" in a shadow in my images before. Any idea what I did wrong, and how to correct it?

Thanks,
Brian (FHPhotographer)



Last edited by FHPhotographer; 12-05-2008 at 09:22 PM.
12-05-2008, 09:04 PM   #2
Veteran Member




Join Date: Mar 2007
Location: Toronto (for now)
Posts: 1,749
I know you mentioned it but is your ACR set to zero or the defaults? The default makes a bunch of changes, you need to make them zero.

Try processing it in penlab and see what happens.
12-05-2008, 09:07 PM   #3
Senior Member
allill's Avatar

Join Date: Aug 2008
Location: San Francisco, California
Posts: 267
I can't help any but if you could figure how to turn that on and off it would be a cool effect.
12-05-2008, 09:47 PM   #4
Ole
Administrator
Ole's Avatar

Join Date: Sep 2006
Location: Copenhagen, Denmark
Photos: Gallery | Albums
Posts: 3,881
ACR applies sharpening by default when it converts to jpeg - perhaps that's what causes this effect?

12-05-2008, 10:20 PM   #5
Veteran Member
FHPhotographer's Avatar

Join Date: Jul 2008
Location: Fountain Hills, AZ
Photos: Gallery | Albums
Posts: 1,298
Original Poster
Response1

QuoteOriginally posted by Ole Quote
ACR applies sharpening by default when it converts to jpeg - perhaps that's what causes this effect?
Nope, it's in the RAW image before conversion,
EDIT: sorry, I stand corrected, it isn't a RAW issue after all. Something happened in the conversion to jpg even without implementing any settings. Now I'm just as confused, but about a different subject,Brian

Last edited by FHPhotographer; 12-05-2008 at 10:26 PM.
12-05-2008, 10:21 PM   #6
Veteran Member
FHPhotographer's Avatar

Join Date: Jul 2008
Location: Fountain Hills, AZ
Photos: Gallery | Albums
Posts: 1,298
Original Poster
Response2

QuoteOriginally posted by Alfisti Quote
I know you mentioned it but is your ACR set to zero or the defaults? The default makes a bunch of changes, you need to make them zero.

Try processing it in penlab and see what happens.
I'll try both suggestions, thanks,
Brian
12-05-2008, 11:17 PM   #7
Veteran Member
KungPOW's Avatar

Join Date: Nov 2007
Location: Vancouver, Canada
Photos: Gallery
Posts: 1,702
You need to buy a Nikon to fix this.
12-05-2008, 11:27 PM   #8
Veteran Member
alohadave's Avatar

Join Date: Jan 2008
Location: Quincy, MA
Photos: Gallery | Albums
Posts: 2,024
Check out this blog post to see if it might be an issue with how ACR is handling scaling.

Jao's photo blog: Fixed - bad scaling in ACR/Lightroom

And the original description of the problem

Jao's photo blog: Resize artefacts

12-05-2008, 11:38 PM   #9
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,416
Hi,
I have seen this "boundary blocking" effect before, but usually in out-of-focus areas of bright colors, never at the shadow boundaries. I have always considered it to be an artifact of the digital image processing in the camera and never suspected the ACR in Lightroom. I will be interested to see if it disappears if the RAW import is zero'ed.

Steve
12-05-2008, 11:41 PM   #10
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,416
QuoteOriginally posted by KungPOW Quote
You need to buy a Nikon to fix this.
Nope, I think he needs to buy a Nikon, a Canon and a Leica. Only expenditure of huge amounts of money can overcome this sort of thing... When the greenbacks are gone all artifacts disappear!

Steve
12-06-2008, 12:18 AM   #11
Veteran Member
jct us101's Avatar

Join Date: Jun 2008
Location: Rohnert Park, CA
Posts: 3,695
QuoteOriginally posted by KungPOW Quote
You need to buy a Nikon to fix this.
I disagree, Canon handles shadows MUCH better.
12-06-2008, 02:44 AM   #12
Senior Member




Join Date: Oct 2007
Location: Northern Virginia
Photos: Gallery
Posts: 131
that is haloing i think. it happens when you drag the recovery and/or fill light sliders too far in adobe camera raw
12-06-2008, 07:10 AM   #13
Veteran Member




Join Date: Aug 2008
Location: London
Photos: Gallery
Posts: 418
i think it is CA which has been badly corrected. Originally those borders would have been green or red, but they have been corrected and then failed. its happened to me before when i was using olympus and shooting into the sky.
12-06-2008, 07:58 AM   #14
Veteran Member
falconeye's Avatar

Join Date: Jan 2008
Location: Munich, Alps, Germany
Photos: Gallery
Posts: 6,863
QuoteOriginally posted by qksilver Quote
that is haloing i think. it happens when you drag the recovery and/or fill light sliders too far in adobe camera raw
This is the (only) correct answer.

Lightroom/ACR has a control called "Lichterkorrektur" in German (I think, it is "Fill Light", the third slider). The "Recovery" slider above can cause this too.

Any of the two sliders first creates a mask around regions which are dark (or bright) and then increases (or decreases) exposure just within the masked region. Unfortunately, this leaves artifacts at the mask boundaries... As you can see.

Therefore, I try to first correct using the level tool further down (which only affects the histogram w/o using a mask). Only if this fails I additionally use the above two sliders.
12-06-2008, 03:01 PM   #15
Pentaxian
Arpe's Avatar

Join Date: Sep 2006
Location: New Zealand
Photos: Gallery | Albums
Posts: 4,344
Agree. Check your recovery slider, or in the curves, the highlights slider.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dslr, idea, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
SR causing double images on K-m nick c Pentax DSLR Discussion 3 08-30-2010 05:53 PM
what's causing this weird yellow tint ? chiem Pentax DSLR Discussion 17 03-11-2009 06:43 AM
IE causing problems with posts? FHPhotographer General Talk 14 01-22-2009 01:16 AM
Flash causing lines on photo marlon Photographic Technique 6 09-16-2008 08:30 AM
Manual lens focusing: what is causing this? kerey Pentax SLR Lens Discussion 10 11-17-2007 02:51 PM



All times are GMT -7. The time now is 04:17 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top