Why so red? - DPChallenge Forums

Canon EF-S 18-55mm f/3.5-5.6

03/03/2006 08:43:05 AM · #1

I'm curious if anyone(especially D200 owners)know why certain images I've been taking have a reddish lean to them? Occasionally other images look a dash off as well.

Taken under heavy Flourescent light with lots of reflecting metal tables.
ISO 640
shutter 1/30
f 5.6

My D70 did a better job at roughly the same setting.

ignite

Canon EOS-500D Rebel T1i

Canon EF 50mm f/1.8 II

03/03/2006 08:55:23 AM · #2

I doubt if ISO, shutter, or aperture has anything to do with this. I would think it was a problem with white balance, or possibly the saturation setting on your camera, or both.

Edit : Just noticed, you said heavy flourescent light, but still you needed 1/30 shutter at 640 ISO? Strange!!

Message edited by author 2006-03-03 08:56:55.

KaDi

Canon EOS-300D Rebel

03/03/2006 09:10:27 AM · #3

The histogram suggests that this image is underexposed. I tend to agree with "ignite" though, it doesn't seem that the red cast would be due to the exposure settings. It may be a good time to review your camera's presets...and maybe its metering points. (The subject and composition of the image are quite appealing, by the way.)

ralph

Nikon Z9

03/03/2006 10:34:55 AM · #4

you don't have 'vivid' turned on, do you ?

i have not noticed any sort of color cast like that ..

kirbic

Canon EOS R5

Canon RF 24-70mm f/2.8 L IS

03/03/2006 10:38:18 AM · #5

Assuming that the white smock is really white, the WB seems pretty darn close. That leaves the saturation setting. I assume that this was shot in JPEG mode? If so, what in-camera setting was used for saturation?

Edit:
Also, with respect to exposure, if you underexpose and then "push" in post, your saturation will be artificially "enhanced" unless you compensate for it, particularly if you boost contrast in post.

Message edited by author 2006-03-03 10:40:31.

kiwiness

Canon Canon 1d x Mark II

Canon EF 24-70mm f/2.8L USM

03/03/2006 01:55:38 PM · #6

I don't have that problem at all with my camera. But maybe like kirbic says, have you increased the in-camera saturation at all?

If it were mine I would do experimental shooting at different camera settings to see where the problem occurs and where it doesn't.

Azrifel

Fujifilm X100VI

03/03/2006 02:01:31 PM · #7

I played with it in Photoshop (curves with white, black and grey sampler);
The whitebalance is too warm, quite a bit even.
The fruit is very saturated, could be a camera setting, could simply be the fresh fruit under that light.

(image removed, served its purpose)

Message edited by author 2006-03-03 17:23:36.

Nikon AF Zoom-Nikkor 70-200mm f/2.8 VR DG IF-ED

03/03/2006 02:30:05 PM · #8

I'll need to check about the "vivid" setting which is what I think I have on. I have taken better images with the D700 in that same light, which has always given me some problems in the past as well but this is the worst.

I'll also check the saturation settings which I have never played with...even on my D70.

I can fix it in PP, no problem but in camera is what's bumming me out. I'll take another poke at it, when I get chance.

Thanks

Pedro

Nikon D200

03/03/2006 02:45:47 PM · #9

i find the d200's auto ISO tends to err to the side of a bit warm. when i do it manually (most of the time) i get way better results. of course, i shoot in RAW anyway, so no madda.

I agree that this seems to be a little underexposed which is causing the oversaturated reds.

Bear_Music

Samsung Galaxy S24 Ultra

Sony 24-70mm F4 Vario-Tessar T* FE OSS

03/03/2006 03:06:15 PM · #10

Ditto that. In general reds oversaturate when underexposed images are pp'd with levels or curves.

R.

Sigma 24-70mm f/2.8 EX Aspherical DF for Canon

03/03/2006 03:35:53 PM · #11

I got it...

I had the cameras sharpening set to "More Vivid" that when switched to "Normal" took most of the red hue down considerably.

Thank you all for your input.

Cheers!

hankk

Canon EOS-5D

03/03/2006 05:05:53 PM · #12

Note that a couple of small spots on the top of your model's hand are more or less correctly colored. (This seems to be where the hand is reflecting light from the fluorescents directly above).

Some fluorescent's put out a lot of green light, so your camera may be trying to WB the green out.

Were all the flourescents the same type (I've seen people mix warm and cool ones becasue they bought the cheapest ones they could get at the time)

Was any other light present, like daylight from a window? If daylight (or tungsten) was present, and coming in from the front, the person's face would have been illuminated by that light, and shadowed from the flourescent. The WB would adjust everything less green (ie more red).

Note that clothing often is washed with detergent that makes it "whiter than white". This is becasue the detergent has blueing in it to add a little blue to the whites.

Message edited by author 2006-03-03 17:10:31.

03/03/2006 06:11:24 PM · #13

I think I figured it out?

There are at least 20-30 flourescent lights, medium light grey floors, bone white walls, a lot of reflecting stainless steel and no other light source at all.

I had in in-camera contrats/sharpness/satch setting ("More Vivid")on high which is fine elsewhere but not in that room.

So I'm throwing the camera away. Only joking....I just need some time to play it's game and all will fall into place.

Cheers!

ralph

Nikon Z9

03/03/2006 06:19:12 PM · #14

i had read (dpreview ?) that the vivid setting was bit extreem
(i havn't tried it .. i tend to do everything post process.. ;)