Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-13-2014, 01:58 AM   #1
Junior Member




Join Date: May 2014
Location: Melbourne
Photos: Gallery
Posts: 25
Where is the yellow colour coming from?

Hey guys,

I'm shooting a red flower and at most of the settings I see yellow colour all over the red colour on the live view or on the final picture.

Does anybody know where this is coming from? Is this a fault of lens? or a sign of photo being overexposed?

The camera is K5 IIs and the lens is SMS Pentax 1.2 M

I'll try to post a picture here

11-13-2014, 02:56 AM   #2
Site Supporter
beachgardener's Avatar

Join Date: Sep 2013
Location: Australia
Photos: Gallery
Posts: 1,927
maybe wrong white balance.

edit. oops sorry i didn't read properly.

Last edited by beachgardener; 11-13-2014 at 04:23 AM.
11-13-2014, 03:22 AM - 1 Like   #3
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,534
QuoteOriginally posted by Samwise.Gamgee Quote
'm shooting a red flower and at most of the settings I see yellow colour all over the red colour on the live view or on the final picture.

That is the Live view overexposure/underexposure indicator - it won't appear up in the captured image. To turn it off, access tab 4 in the camera menu >Live view> bright/dark area>
11-13-2014, 04:12 AM   #4
Pentaxian
LensBeginner's Avatar

Join Date: Sep 2014
Photos: Albums
Posts: 2,489
QuoteOriginally posted by Digitalis Quote
That is the Live view overexposure/underexposure indicator - it won't appear up in the captured image. To turn it off, access tab 4 in the camera menu >Live view> bright/dark area>
This. The "blinkies".
If it's red, then it's overexposed and you lose detail because of clipping.
If it's yellow, then it's underexposed and you lose detail because of clipping on the other side of the histogram.

11-13-2014, 04:19 AM   #5
Junior Member




Join Date: May 2014
Location: Melbourne
Photos: Gallery
Posts: 25
Original Poster
This is the photo



QuoteOriginally posted by Digitalis Quote
That is the Live view overexposure/underexposure indicator - it won't appear up in the captured image. To turn it off, access tab 4 in the camera menu >Live view> bright/dark area>
I'll check that but as shown above I see this even in the captured shot

---------- Post added 11-13-14 at 03:03 PM ----------

Another shot from the same flower (different settings)

11-13-2014, 04:35 AM   #6
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,534
QuoteOriginally posted by Samwise.Gamgee Quote
I see this even in the captured shot
That is called overexposure, you need to give a -2 stop exposure compensation to capture a red subject like that properly.

As I have said before the over/underexposure indicators will not appear in the final image.
11-13-2014, 04:57 AM   #7
Junior Member




Join Date: May 2014
Location: Melbourne
Photos: Gallery
Posts: 25
Original Poster
QuoteOriginally posted by Digitalis Quote
That is called overexposure, you need to give a -2 stop exposure compensation to capture a red subject like that properly.

As I have said before the over/underexposure indicators will not appear in the final image.
Thanks for your help Digitalis, but I have trouble understanding what you mean

I have posted the final image and the yellow colour is appearing in it !?! so how come you saying it will not appear in the final image

and why is this happening just for the red flower? does this having anything to do with colour red?

instead of -2 stop exposure compensation (-2 EV Compensation), can I close the shutter, two stops?
11-13-2014, 05:16 AM   #8
Pentaxian
LensBeginner's Avatar

Join Date: Sep 2014
Photos: Albums
Posts: 2,489
QuoteOriginally posted by Samwise.Gamgee Quote
Thanks for your help Digitalis, but I have trouble understanding what you mean

I have posted the final image and the yellow colour is appearing in it !?! so how come you saying it will not appear in the final image

and why is this happening just for the red flower? does this having anything to do with colour red?

instead of -2 stop exposure compensation (-2 EV Compensation), can I close the shutter, two stops?
Nope, those are not "blinkies"...
It looks like a color shift of some sort... did you check your White Balance?

Maybe some overexposure in the red channel...
Reds are notoriously difficult to be rendered properly on digital cameras...

Check this thread as well:
https://www.pentaxforums.com/forums/38-photographic-technique/276739-what-about-red.html

11-13-2014, 06:23 AM   #9
Junior Member




Join Date: May 2014
Location: Melbourne
Photos: Gallery
Posts: 25
Original Poster
Hi LensBeginner,

You seem to be right. Below I'm comparing the raw (PEF) and JPEG and the raw file doesn't seem to have this issue. So you're guessing the WB might be going this?
I'll keep reading your link regarding shooting red colour

11-13-2014, 06:36 AM   #10
Pentaxian
LensBeginner's Avatar

Join Date: Sep 2014
Photos: Albums
Posts: 2,489
QuoteOriginally posted by Samwise.Gamgee Quote
Hi LensBeginner,

You seem to be right. Below I'm comparing the raw (PEF) and JPEG and the raw file doesn't seem to have this issue. So you're guessing the WB might be going this?
I'll keep reading your link regarding shooting red colour
Looking at them side to side, it looks like the sum of multiple factors...
Saturation and slight overexposure of the more luminous part cause (I believe) clipping in the red channel.
Camera RAW should use the values your camera records as far as WB is concerned... which mode did you use, auto?
It seems more like an oversaturation(and/or overexposure) issue... try paying a visit to the HSL panel in Camera RAW and further reduce Luminance and Saturation with the "Reds" slider, also try adjusting the Hue sliders in the affected colors.

That often does the trick.
Also check that your WB is correct (should be at or around 5500K in daylight).
11-13-2014, 06:37 AM   #11
Loyal Site Supporter
TER-OR's Avatar

Join Date: Apr 2009
Location: Dundee, IL
Photos: Gallery | Albums
Posts: 5,413
Yeah, that color shift is probably white balance issues - the software is good but can still be fooled.
Though this kind of color change can also be overexposure - you'll need to play with your RAW processing, where oversaturation can be reduced.
11-13-2014, 08:08 AM   #12
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,534
QuoteOriginally posted by Samwise.Gamgee Quote
instead of -2 stop exposure compensation (-2 EV Compensation), can I close the shutter, two stops?
that will do the trick.
11-15-2014, 07:48 AM   #13
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,315
it could be blinkies but they only show in live view. Not what is bothering OP. White balance would affect the whole image so its not that either. Jpeg mode wouldnt do that but it can affect colours. Digitalis is right. Its overexposure because flower leaves are so reflective. Use highlight correction or ev+/-. A polarizing filter might also help. These reduce glare.
11-15-2014, 10:48 AM   #14
Junior Member




Join Date: Oct 2009
Location: Norman, Oklahoma
Posts: 42
I agree that it is probably overexposure. I shoot a lot of flower shots and have experienced similar results - especially shooting red (or pink) and also yellow flowers. Underexposing a bit generally does the trick. White balance can also play a part. I tend to like "warmer" shots, but I generally have to go a little "cooler" when shooting red and yellow flowers.
11-15-2014, 03:15 PM   #15
Pentaxian
LensBeginner's Avatar

Join Date: Sep 2014
Photos: Albums
Posts: 2,489
I make sure to always show the RGB histogram in playback when shooting flowers or red subjects.
You'd be surprised at the variance between the channels, and how often a single channel clips while the luminance histogram says you're fine...
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, colour, lens, live view, pentax help, photography, picture, shot, troubleshooting
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Something Big Is Coming From Canon (And It Will Ship in October) interested_observer Non-Pentax Cameras: Canon, Nikon, etc. 34 07-09-2014 10:07 PM
Is coming the replacement of 01 Prime? ElvisQ Pentax Q 2 04-05-2013 05:41 PM
Any idea where this light is coming from to ruin my negatives? bmf Pentax Film SLR Discussion 5 10-10-2012 07:17 PM
Where is the Pentax news from CES 2010? KungPOW Pentax News and Rumors 29 01-19-2010 11:31 AM
Can't figure out where this is coming from photolady95 Troubleshooting and Beginner Help 30 05-26-2009 06:29 AM



All times are GMT -7. The time now is 01:03 AM. | See also: NikonForums.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