Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-07-2019, 02:55 AM   #1
Veteran Member




Join Date: Apr 2012
Posts: 395
How red is your red ?

I took some shots of flowers with the Jupiter 37A, they are not very sharp due to the wind and low light, but I always find that the red is over saturated on my K3 where other colors are quite natural, is this normal ? I got more natural red with cell phone.

Attached Images
       
05-07-2019, 03:02 AM - 2 Likes   #2
amateur dirt farmer / mod
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 14,824
depends upon the light and the shade of red - and the lens...




broad daylight, lipstick red, FA43


some reds hover at the edge of pink/magenta and those always seem to oversaturate for me...
05-07-2019, 03:15 AM - 3 Likes   #3
Loyal Site Supporter
Loyal Site Supporter
pschlute's Avatar

Join Date: Mar 2007
Location: Surrey, UK
Photos: Gallery
Posts: 3,057
QuoteOriginally posted by lotech Quote
I took some shots of flowers with the Jupiter 37A, they are not very sharp due to the wind and low light, but I always find that the red is over saturated on my K3 where other colors are quite natural, is this normal ? I got more natural red with cell phone
Checking the histogram of the second (very red) picture shows the red channel severely clipped. Set your histogram display on the camera to show RGB channels not luminance when photographing rich colours like this. Then you can ensure they are not clipped.

just reducing the brightness of the reds brings out a little more detail in the flower as below
Attached Images
View Picture EXIF
  Photo 

Last edited by pschlute; 05-07-2019 at 03:22 AM.
05-07-2019, 04:37 AM   #4
Site Supporter
Site Supporter




Join Date: Dec 2012
Photos: Albums
Posts: 906
Sometimes my reds are too red, but I think it's dependent on your RAW converter. Or maybe you can compensate for it through your RAW converter. See this post, and this one. Things were fine with my K-3 when using Lightroom, but I had problems when I was transitioning to RawTherapee. Now that I have a lot more experience with RT it's not a problem, I think I have a set of pp3 files (i.e. basically context-dependent presets for things like ISO and lens) that the reds look fine with.

For a while I would explicitly back off the reds in some files, but I haven't had to do that in quite a while. I think it's just a better combination of lens profiles, camera profiles, and pp3 files.

05-07-2019, 05:37 AM   #5
Site Supporter
Site Supporter




Join Date: Feb 2015
Photos: Gallery | Albums
Posts: 6,516
Reds are rather limited by sRGB, only a little better with Adobe RGB.
05-07-2019, 07:12 AM   #6
Pentaxian
rogerstg's Avatar

Join Date: Oct 2007
Location: Rhode Island
Photos: Albums
Posts: 465
QuoteOriginally posted by lotech Quote
I always find that the red is over saturated on my K3
What do the unprocessed raw files look like? I had similar results with my KP with custom image on bright. JPEG reds were blown out, but the unprocessed raw was fine.
05-07-2019, 08:03 AM - 2 Likes   #7
Site Supporter
Site Supporter




Join Date: Dec 2013
Location: PA
Photos: Gallery
Posts: 424
i miss ccd colors
05-07-2019, 10:45 AM - 3 Likes   #8
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,916
Both saturated red and saturated yellow are problem colors for digital capture in that both clip easily. The key to dealing with it is to avoid overexposure when either are present. The histogram will provide clues. Working from RAW may also provide some additional flexibility in post processing.

QuoteOriginally posted by sculptor666 Quote
i miss ccd colors
This was a problem on my previous K10D too. The nice thing is that recent model bodies with RGB meter arrays have meter firmware to anticipate individual channel clipping and will scale the exposure down when detected.


Steve

05-07-2019, 01:08 PM   #9
Pentaxian




Join Date: Dec 2016
Posts: 1,681
QuoteOriginally posted by rogerstg Quote
What do the unprocessed raw files look like? I had similar results with my KP with custom image on bright. JPEG reds were blown out, but the unprocessed raw was fine.
Not hard to remedy. Either switch to "Natural" which has a different color palette, or go into the "Bright" settings and reduce saturation a little.
05-07-2019, 01:45 PM   #10
Pentaxian
rogerstg's Avatar

Join Date: Oct 2007
Location: Rhode Island
Photos: Albums
Posts: 465
QuoteOriginally posted by mikesbike Quote
Not hard to remedy. Either switch to "Natural" which has a different color palette, or go into the "Bright" settings and reduce saturation a little.
Much easier than that. Just shoot raw and run it through DCU to choose the camera settings that would have worked best. It's hard to know what the prob might be before the shot, and if shooting jpeg, it's too late after.

It's academic though since we don't know if that's the OP's problem.
05-07-2019, 02:01 PM   #11
Pentaxian




Join Date: Jun 2008
Location: Idaho
Photos: Gallery
Posts: 773
One of the key factors is the display you're looking at the shots on. Some monitors are better than others so you might take those photos with a grain of salt until you see the images on a calibrated wide gamut monitor. The LCD screen of your camera is a poor way to judge colors in most cases. Ambient lighting can also affect how colors appear so viewing a monitor in a brightly lighted room can prove detrimental to color quality.

Just something to keep in mind.
05-07-2019, 03:04 PM   #12
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,916
QuoteOriginally posted by rogerstg Quote
Much easier than that. Just shoot raw and run it through DCU to choose the camera settings that would have worked best. It's hard to know what the prob might be before the shot, and if shooting jpeg, it's too late after.

It's academic though since we don't know if that's the OP's problem.
Neither will help if the red channel is truly clipped. Below is the sole frame of a bracketed series where the yellows could be salvaged. The other frames were irretrievably red-clipped for the yellow flowers in the RAW*. This one was not.




Steve

* True yellow is done with an equal combination of red and green with zero blue (FFFF00).
05-07-2019, 05:34 PM   #13
Veteran Member




Join Date: Apr 2012
Posts: 395
Original Poster
How to adjust color on the K3 I rarely touch that part ? and I just started to learn RawTheapee, thanks.

QuoteOriginally posted by pschlute Quote
Checking the histogram of the second (very red) picture shows the red channel severely clipped. Set your histogram display on the camera to show RGB channels not luminance when photographing rich colours like this. Then you can ensure they are not clipped.

just reducing the brightness of the reds brings out a little more detail in the flower as below


---------- Post added 05-08-19 at 08:39 AM ----------

CCD color ? what does it look like ? I heard CCD was better than CMOS in color rendition and resolution but power hungry, I also want to see the Foveon sensor color some day !

QuoteOriginally posted by sculptor666 Quote
i miss ccd colors
05-07-2019, 05:51 PM   #14
Pentaxian




Join Date: Dec 2016
Posts: 1,681
QuoteOriginally posted by Bob 256 Quote
One of the key factors is the display you're looking at the shots on. Some monitors are better than others so you might take those photos with a grain of salt until you see the images on a calibrated wide gamut monitor. The LCD screen of your camera is a poor way to judge colors in most cases. Ambient lighting can also affect how colors appear so viewing a monitor in a brightly lighted room can prove detrimental to color quality.

Just something to keep in mind.
I agree with that, all right. There is very often quite a difference between viewing on screen and running a print from a high-quality printer, both in color reproduction and even in exposure properties.
05-07-2019, 06:44 PM - 1 Like   #15
Loyal Site Supporter
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 12,896
Lotech, the easiest thing is to underexpose to the point that even in the playback image in the LCD viewer you can still see detail in the yellows and reds.

In post processing the RAW you then lift the exposure in all the other areas, and then adjust all areas to balance nicely for the final image.
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!
adobe, camera, ccd, channel, clipped, clipping, color, converter, data, daylight, dslr, exposure, histogram, level, line, manufacturers, photography, profile, profiles, reds, sensor, software, uniwb, wb, whites
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Nature There's Red and more Red, and then there's Pentax Red. :)) Tonytee Post Your Photos! 4 03-18-2019 03:17 PM
Nature Assorted red,red and more red colors. Tonytee Post Your Photos! 6 06-28-2018 10:50 PM
Nature A Red,Red, Red. Tonytee Post Your Photos! 2 04-12-2018 03:04 AM
"Give me your tired, your poor, Your huddled masses.. and self-deport jeffkrol General Talk 1 08-15-2012 07:44 PM
Photo Story Time documents: Show me your genre study, your reportage, your photo story... etc. christophleipzig Mini-Challenges, Games, and Photo Stories 11 10-15-2011 06:26 AM



All times are GMT -7. The time now is 02:29 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