K-5 colour issue

Bcrary3 · 04-10-2014, 07:16 AM

Okay, so I have been taking a lot of photos recently, and it's been a while.
Something I am noticing is, I am getting weird results in my photos, lines, and blotchiness(?) especially in dark colours, mostly black. I have no idea what is causing it, but I have had this issue with two lenses now, and I need to know what is going on.

I will be posting photos soon.

**TER-OR** · 04-10-2014, 07:59 AM

Let us know whether this is with jpg or RAW images, too. It can be a jpg processing issue.

Bcrary3 · 04-10-2014, 08:10 AM

Okay, this does have some post process on it, but I shoot all my photos in RAW.

Bcrary3 · 04-10-2014, 08:12 AM

I don't know if it shows up on the first one.

Attached Images

VoiceOfReason · 04-10-2014, 08:31 AM

Did you underexpose and have to pull out detail from the shadows? Also, that second one looks like the WB is off by quite a bit, and there are lines in the sky where it looks like a ton of NR was used. Try overexposing a bit, or try exposure bracketing some and see what it looks like.

Bcrary3 · 04-10-2014, 08:54 AM

According to the in camera metre, it was perfectly exposed. The second one I uploaded has no PP on it. WB I usually correct in post. You might be onto something with the NR. I'll try turning it off and seeing if that helps any. I might also play around with the saturation settings on the camera itself, maybe that'll help too. Don't have it with me right now. Haha

**TER-OR** · 04-10-2014, 08:55 AM

And if you're shooting RAW and processing separately, you can try to lift the shadows. In Lightroom I find this very useful. Bumping exposure alone won't help the backlighting problem.

stevebrot · 04-10-2014, 09:02 AM

The first looks nominal, while the second suffers from the kind of artifact I have seen with conversion to 8-bit color in the final JPEG or with JPEG conversion based on a downsized TIFF. This is a post-processing issue and is related to curve/contrast manipulation and/or resizing and subsequent editing of the resized output.

How are you doing your RAW conversion and PP? Faststone by any chance? There are two recent threads regarding artifacts similar to yours:

https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/256...n-problem.html

https://www.pentaxforums.com/forums/32-digital-processing-software-printing/2...mpression.html

Steve

(...funny how this sort of thing clusters. It has been some time since we had questions regarding sky banding and color blocking and now three in a couple of weeks span...)

Bcrary3 · 04-10-2014, 09:25 AM

Originally posted by stevebrot

The first looks nominal, while the second suffers from the kind of artifact I have seen with conversion to 8-bit color in the final JPEG or with JPEG conversion based on a downsized TIFF. This is a post-processing issue and is related to curve/contrast manipulation and/or resizing and subsequent editing of the resized output.

How are you doing your RAW conversion and PP? Faststone by any chance? There are two recent threads regarding artifacts similar to yours:

https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/256...n-problem.html

https://www.pentaxforums.com/forums/32-digital-processing-software-printing/2...mpression.html

Steve

(...funny how this sort of thing clusters. It has been some time since we had questions regarding sky banding and color blocking and now three in a couple of weeks span...)

To view my photos I am using FastStone, but to actually bring my RAW images into Photoshop I am using Bridge.

The first one I posted went through PP.
The second one did NOT.

---------- Post added 04-10-14 at 11:26 AM ----------

Originally posted by stevebrot

The first looks nominal, while the second suffers from the kind of artifact I have seen with conversion to 8-bit color in the final JPEG or with JPEG conversion based on a downsized TIFF. This is a post-processing issue and is related to curve/contrast manipulation and/or resizing and subsequent editing of the resized output.

How are you doing your RAW conversion and PP? Faststone by any chance? There are two recent threads regarding artifacts similar to yours:

https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/256...n-problem.html

https://www.pentaxforums.com/forums/32-digital-processing-software-printing/2...mpression.html

Steve

(...funny how this sort of thing clusters. It has been some time since we had questions regarding sky banding and color blocking and now three in a couple of weeks span...)

I had this issue about a year ago, I don't know if you saw it or not, but that was using a different lense, and on that one, it is limited to only the sky, and looks almost like Newtons rings, but are to concentric.

stevebrot · 04-10-2014, 10:53 AM

Originally posted by Bcrary3

To view my photos I am using FastStone, but to actually bring my RAW images into Photoshop I am using Bridge.

The first one I posted went through PP.
The second one did NOT.

So the second is a screen capture from Faststone? One of the links I provided above talks about this. It is an artifact related to how Faststone generates its preview images. I believe that a fix was found.

Steve

---------- Post added 04-10-14 at 11:02 AM ----------

Originally posted by stevebrot

So the second is a screen capture from Faststone? One of the links I provided above talks about this. It is an artifact related to how Faststone generates its preview images. I believe that a fix was found.

Steve

Found it:

"set the default capture setting in Faststone to ' View in actual size - slower,' and batch convert in actual size - slower'."

Faststone is displaying an extrapolated version of the RAW thumbnail JPEG, hence the artifacts. Change the defaults to generate the preview from the RAW instead.

Steve

Bcrary3 · 04-10-2014, 12:16 PM

Originally posted by stevebrot

So the second is a screen capture from Faststone? One of the links I provided above talks about this. It is an artifact related to how Faststone generates its preview images. I believe that a fix was found.

Steve

---------- Post added 04-10-14 at 11:02 AM ----------

Found it:

"set the default capture setting in Faststone to ' View in actual size - slower,' and batch convert in actual size - slower'."

Faststone is displaying an extrapolated version of the RAW thumbnail JPEG, hence the artifacts. Change the defaults to generate the preview from the RAW instead.

Steve

Okay, that appears to have solved that issue... haha

Thanks!

stevebrot · 04-10-2014, 02:51 PM

Originally posted by Bcrary3

Okay, that appears to have solved that issue... haha

Thanks!

Cool! That was easy!

Steve

axlrose · 04-12-2014, 07:19 AM

lens problem maybe?

04-10-2014, 07:16 AM	#1
Bcrary3 Veteran Member Join Date: Feb 2013 Location: Wisconsin Photos: Gallery Posts: 391	K-5 colour issue Okay, so I have been taking a lot of photos recently, and it's been a while. Something I am noticing is, I am getting weird results in my photos, lines, and blotchiness(?) especially in dark colours, mostly black. I have no idea what is causing it, but I have had this issue with two lenses now, and I need to know what is going on. I will be posting photos soon.

04-10-2014, 09:02 AM	#8
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	The first looks nominal, while the second suffers from the kind of artifact I have seen with conversion to 8-bit color in the final JPEG or with JPEG conversion based on a downsized TIFF. This is a post-processing issue and is related to curve/contrast manipulation and/or resizing and subsequent editing of the resized output. How are you doing your RAW conversion and PP? Faststone by any chance? There are two recent threads regarding artifacts similar to yours: https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/256...n-problem.html https://www.pentaxforums.com/forums/32-digital-processing-software-printing/2...mpression.html Steve (...funny how this sort of thing clusters. It has been some time since we had questions regarding sky banding and color blocking and now three in a couple of weeks span...) Last edited by stevebrot; 04-10-2014 at 09:10 AM.

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04-10-2014, 07:59 AM	#2
TER-OR Site Supporter Join Date: Apr 2009 Location: Dundee, IL Photos: Gallery \| Albums Posts: 6,699	Let us know whether this is with jpg or RAW images, too. It can be a jpg processing issue.

04-10-2014, 08:12 AM	#4
Bcrary3 Veteran Member Join Date: Feb 2013 Location: Wisconsin Photos: Gallery Posts: 391 Original Poster	I don't know if it shows up on the first one. Attached Images

04-10-2014, 08:31 AM	#5
VoiceOfReason Site Supporter Join Date: Jun 2010 Location: Mishawaka IN area Photos: Albums Posts: 6,124	Did you underexpose and have to pull out detail from the shadows? Also, that second one looks like the WB is off by quite a bit, and there are lines in the sky where it looks like a ton of NR was used. Try overexposing a bit, or try exposure bracketing some and see what it looks like.

04-10-2014, 08:54 AM	#6
Bcrary3 Veteran Member Join Date: Feb 2013 Location: Wisconsin Photos: Gallery Posts: 391 Original Poster	According to the in camera metre, it was perfectly exposed. The second one I uploaded has no PP on it. WB I usually correct in post. You might be onto something with the NR. I'll try turning it off and seeing if that helps any. I might also play around with the saturation settings on the camera itself, maybe that'll help too. Don't have it with me right now. Haha

04-10-2014, 08:55 AM	#7
TER-OR Site Supporter Join Date: Apr 2009 Location: Dundee, IL Photos: Gallery \| Albums Posts: 6,699	And if you're shooting RAW and processing separately, you can try to lift the shadows. In Lightroom I find this very useful. Bumping exposure alone won't help the backlighting problem.

04-10-2014, 09:25 AM	#9
Bcrary3 Veteran Member Join Date: Feb 2013 Location: Wisconsin Photos: Gallery Posts: 391 Original Poster	Originally posted by stevebrot The first looks nominal, while the second suffers from the kind of artifact I have seen with conversion to 8-bit color in the final JPEG or with JPEG conversion based on a downsized TIFF. This is a post-processing issue and is related to curve/contrast manipulation and/or resizing and subsequent editing of the resized output. How are you doing your RAW conversion and PP? Faststone by any chance? There are two recent threads regarding artifacts similar to yours: https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/256...n-problem.html https://www.pentaxforums.com/forums/32-digital-processing-software-printing/2...mpression.html Steve (...funny how this sort of thing clusters. It has been some time since we had questions regarding sky banding and color blocking and now three in a couple of weeks span...) To view my photos I am using FastStone, but to actually bring my RAW images into Photoshop I am using Bridge. The first one I posted went through PP. The second one did NOT. ---------- Post added 04-10-14 at 11:26 AM ---------- Originally posted by stevebrot The first looks nominal, while the second suffers from the kind of artifact I have seen with conversion to 8-bit color in the final JPEG or with JPEG conversion based on a downsized TIFF. This is a post-processing issue and is related to curve/contrast manipulation and/or resizing and subsequent editing of the resized output. How are you doing your RAW conversion and PP? Faststone by any chance? There are two recent threads regarding artifacts similar to yours: https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/256...n-problem.html https://www.pentaxforums.com/forums/32-digital-processing-software-printing/2...mpression.html Steve (...funny how this sort of thing clusters. It has been some time since we had questions regarding sky banding and color blocking and now three in a couple of weeks span...) I had this issue about a year ago, I don't know if you saw it or not, but that was using a different lense, and on that one, it is limited to only the sky, and looks almost like Newtons rings, but are to concentric.

04-10-2014, 10:53 AM	#10
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Bcrary3 To view my photos I am using FastStone, but to actually bring my RAW images into Photoshop I am using Bridge. The first one I posted went through PP. The second one did NOT. So the second is a screen capture from Faststone? One of the links I provided above talks about this. It is an artifact related to how Faststone generates its preview images. I believe that a fix was found. Steve ---------- Post added 04-10-14 at 11:02 AM ---------- Originally posted by stevebrot So the second is a screen capture from Faststone? One of the links I provided above talks about this. It is an artifact related to how Faststone generates its preview images. I believe that a fix was found. Steve Found it: "set the default capture setting in Faststone to ' View in actual size - slower,' and batch convert in actual size - slower'." Faststone is displaying an extrapolated version of the RAW thumbnail JPEG, hence the artifacts. Change the defaults to generate the preview from the RAW instead. Steve

04-10-2014, 12:16 PM	#11
Bcrary3 Veteran Member Join Date: Feb 2013 Location: Wisconsin Photos: Gallery Posts: 391 Original Poster	Originally posted by stevebrot So the second is a screen capture from Faststone? One of the links I provided above talks about this. It is an artifact related to how Faststone generates its preview images. I believe that a fix was found. Steve ---------- Post added 04-10-14 at 11:02 AM ---------- Found it: "set the default capture setting in Faststone to ' View in actual size - slower,' and batch convert in actual size - slower'." Faststone is displaying an extrapolated version of the RAW thumbnail JPEG, hence the artifacts. Change the defaults to generate the preview from the RAW instead. Steve Okay, that appears to have solved that issue... haha Thanks!

04-10-2014, 02:51 PM	#12
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Bcrary3 Okay, that appears to have solved that issue... haha Thanks! Cool! That was easy! Steve

04-12-2014, 07:19 AM	#13
axlrose New Member Join Date: Dec 2013 Posts: 23	lens problem maybe?