Red over-saturation

MichaelSt · 07-28-2019, 03:33 AM

I use a Pentax K3. It seems to have a default preset which over-saturates REDS. This is particularly noticeable with skin tones, which makes every face seem very florid. Of course, I can correct this readily in Photoshop, but I was hoping someone here might guide me into how to reduce red saturation levels in the camera itself. Thank you.

**GUB** · 07-28-2019, 03:36 AM

What is your custom image set to
and what is your white balance set to.
EDIT ps welcome to the forum

**Kerrowdown** · 07-28-2019, 03:43 AM

Originally posted by MichaelSt

Red over-saturation

Welcome to the forum, exposing for Reds is always more difficult with most camera brands, try under exposing the image as this usually helps.

**GUB** · 07-28-2019, 03:46 AM

He is talking about skin tones Kerrowdown that is unlikely to be a channel flooding problem is it?

Oldbayrunner · 07-28-2019, 04:05 AM

Are you shooting Jpeg or raw?

**Kerrowdown** · 07-28-2019, 04:13 AM - **3 Likes**

Originally posted by GUB

He is talking about skin tones Kerrowdown that is unlikely to be a channel flooding problem is it?

True... unless they have a bad case of sunburn.

But I forget that I always under expose by 2/3 of stop, as a matter of course and sometimes by an awful lot more.

Originally posted by GUB

Yep nothing ruins a picture quicker than clipping the highlights.

Like this one was 4 stops under...

.

**GUB** · 07-28-2019, 04:20 AM

Originally posted by Kerrowdown

But I forget that I always under expose by 2/3 of stop, as a matter of course and sometimes by an awful lot more.

Yep nothing ruins a picture quicker than clipping the highlights.

And he has just gone offline -- I wouldn't bother responding more until he responds.

Sandy Hancock · 07-28-2019, 04:34 AM

Hi Michael. Always nice to have another Aussie on board.

Reds are tricky. I suspect the difference between brands may have more to do with their baked-in JPEG profiles than anything to do with the RAW system. As I only shoot RAW and always expect to process my images I've never really considered it to be a problem.

I would welcome some sample images, which illustrate your problem.

**GUB** · 07-28-2019, 04:49 AM

Originally posted by Kerrowdown

Like this one was 4 stops under...

It is likely you merely dropped your Iso to go 4 stops under. That means there is no down side.
Of course to be pedantic how do you define this as "4 stops under"? After all the lights are still clipped. I guess you mean 4 stops under what the camera suggested.
EDIT It is obviously a tripod shot so you were probably at base Iso anyway. So that means the shadow areas you pulled back up have elevated noise but you have total control over the highlights. A great trade off.

Sandy Hancock · 07-28-2019, 04:56 AM - **2 Likes**

Originally posted by Kerrowdown

Like this one was 4 stops under...

There is literally no red in this image. Why is it relevant to this thread?

**GUB** · 07-28-2019, 05:01 AM

Filling in time waiting for the OP to get back.!! He was online till well after kerrowdown's post then went offline. I suspect he has found his problem and headed off.

**Kerrowdown** · 07-28-2019, 05:03 AM - **2 Likes**

Originally posted by Sandy Hancock

There is literally no red in this image. Why is it relevant to this thread?

You are quite correct, my apologies for the thread commandeering.

Conversation started as a result of my comment, concerning under exposure to retain Red detail, apologies again to all.

**GUB** · 07-28-2019, 05:07 AM

Yes we need a red picture to keep this conversation going.!

Sandy Hancock · 07-28-2019, 05:14 AM

Originally posted by GUB

Yes we need a red picture to keep this conversation going.!

Ricoh GRIII. As red as red gets.

Pentax KP. Red reddy red.

Pentax K-1 Mark II. Did someone say red?

biz-engineer · 07-28-2019, 05:17 AM

Originally posted by MichaelSt

Red over-saturation

Use Adobe RGB as your primary color space. Adobe RGB give some extra headroom for the red tones not to be compressed as much as with sRGB.

07-28-2019, 03:33 AM	#1
MichaelSt New Member Join Date: Jul 2019 Posts: 1	Red over-saturation I use a Pentax K3. It seems to have a default preset which over-saturates REDS. This is particularly noticeable with skin tones, which makes every face seem very florid. Of course, I can correct this readily in Photoshop, but I was hoping someone here might guide me into how to reduce red saturation levels in the camera itself. Thank you.

07-28-2019, 04:13 AM - 3 Likes	#6
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,863	Originally posted by GUB He is talking about skin tones Kerrowdown that is unlikely to be a channel flooding problem is it? True... unless they have a bad case of sunburn. But I forget that I always under expose by 2/3 of stop, as a matter of course and sometimes by an awful lot more. Originally posted by GUB Yep nothing ruins a picture quicker than clipping the highlights. Like this one was 4 stops under... . Last edited by Kerrowdown; 07-28-2019 at 04:29 AM.

07-28-2019, 04:49 AM	#9
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,760	Originally posted by Kerrowdown Like this one was 4 stops under... It is likely you merely dropped your Iso to go 4 stops under. That means there is no down side. Of course to be pedantic how do you define this as "4 stops under"? After all the lights are still clipped. I guess you mean 4 stops under what the camera suggested. EDIT It is obviously a tripod shot so you were probably at base Iso anyway. So that means the shadow areas you pulled back up have elevated noise but you have total control over the highlights. A great trade off. Last edited by GUB; 07-28-2019 at 04:58 AM.

07-28-2019, 05:03 AM - 2 Likes	#12
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,863	Originally posted by Sandy Hancock There is literally no red in this image. Why is it relevant to this thread? You are quite correct, my apologies for the thread commandeering. Conversation started as a result of my comment, concerning under exposure to retain Red detail, apologies again to all. Last edited by Kerrowdown; 07-28-2019 at 05:30 AM.

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07-28-2019, 03:36 AM	#2
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,760	What is your custom image set to and what is your white balance set to. EDIT ps welcome to the forum

07-28-2019, 03:43 AM	#3
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,863	Originally posted by MichaelSt Red over-saturation Welcome to the forum, exposing for Reds is always more difficult with most camera brands, try under exposing the image as this usually helps.

07-28-2019, 03:46 AM	#4
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,760	He is talking about skin tones Kerrowdown that is unlikely to be a channel flooding problem is it?

07-28-2019, 04:05 AM	#5
Oldbayrunner Pentaxian Join Date: Mar 2013 Posts: 1,665	Are you shooting Jpeg or raw?

07-28-2019, 04:20 AM	#7
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,760	Originally posted by Kerrowdown But I forget that I always under expose by 2/3 of stop, as a matter of course and sometimes by an awful lot more. Yep nothing ruins a picture quicker than clipping the highlights. And he has just gone offline -- I wouldn't bother responding more until he responds.

07-28-2019, 04:34 AM	#8
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,275	Hi Michael. Always nice to have another Aussie on board. Reds are tricky. I suspect the difference between brands may have more to do with their baked-in JPEG profiles than anything to do with the RAW system. As I only shoot RAW and always expect to process my images I've never really considered it to be a problem. I would welcome some sample images, which illustrate your problem.

07-28-2019, 04:56 AM - 2 Likes	#10
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,275	Originally posted by Kerrowdown Like this one was 4 stops under... There is literally no red in this image. Why is it relevant to this thread?

07-28-2019, 05:01 AM	#11
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,760	Filling in time waiting for the OP to get back.!! He was online till well after kerrowdown's post then went offline. I suspect he has found his problem and headed off.

07-28-2019, 05:07 AM	#13
GUB Loyal Site Supporter Join Date: Aug 2012 Location: Wanganui Photos: Gallery \| Albums Posts: 5,760	Yes we need a red picture to keep this conversation going.!

07-28-2019, 05:14 AM	#14
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,275	Originally posted by GUB Yes we need a red picture to keep this conversation going.! Ricoh GRIII. As red as red gets. Pentax KP. Red reddy red. Pentax K-1 Mark II. Did someone say red?

07-28-2019, 05:17 AM	#15
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,247	Originally posted by MichaelSt Red over-saturation Use Adobe RGB as your primary color space. Adobe RGB give some extra headroom for the red tones not to be compressed as much as with sRGB.