Weird cast of colour in my photos


tecnica

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Dec 26, 2004
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today i was out snapping photos but to my horror some photos have a strange cast of colour..


normal


see the diff?

i used a 7D with 50mm F1.8 II for the above 2 photos.. i dun get encounter this with my 18-135mm, or should i put it i haven't encounter it YET.. the lighting indoor was just normal fluorescent light.. anyone got any idea what's wrong? :cry:
 

catchlights

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today i was out snapping photos but to my horror some photos have a strange cast of colour..


normal


see the diff?

i used a 7D with 50mm F1.8 II for the above 2 photos.. i dun get encounter this with my 18-135mm, or should i put it i haven't encounter it YET.. the lighting indoor was just normal fluorescent light.. anyone got any idea what's wrong? :cry:
fluorescent light flicker, use a slower shutter speed lower than 1/30s will not have such problem,

nothing wrong with your camera.
 

tecnica

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Dec 26, 2004
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fluorescent light flicker, use a slower shutter speed lower than 1/30s will not have such problem,

nothing wrong with your camera.
oh so this is caused by high shutter speed?

cos i want to freeze action ah, so need higher speed.. hmm
 

night86mare

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Aug 25, 2006
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fluorescent lighting is the issue here.

http://photo.net/wedding-photography-forum/00JipQ

Flourescent not only has terrible color balance, but its color balance is continuously changing through the AC power cycle, 60 times a second. If you want to convince yourself of this, use a fast shutter speed (1/250 or so), and take ten photos under flourescent lights of the identical subject under identical conditions. They'll show color variations, since they'll be picking out different portions of the AC cycle at random.

By setting the shutter speed to 1/60 or slower, you'll capture a full AC cycle, and thereby average out the color variations over the full cycle.
 

tecnica

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Dec 26, 2004
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Yes,

the boxes are not jumping or flying, I don't see the need of using 1/500s anyway.
no no.. the boxes are just test subjects to bring out my point.. i got the strange colour when i was snapping people..

thanks for the explanation anyway
 

tecnica

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spawnx

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well to give you a practical solution, i do alot of event coverage indoors so... to counter the flickering effect, i shoot in 2-3 shot bursts for the same scene. Out of the 2 or 3, you'll get at least 1 shot without the problem..
 

tecnica

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from the link nightmare posted:

If you're shooting without flash, simply set WB to flourescent. If you're using a flash, gel your flash with a 1/2 or full Plusgreen gel from Rosco/Lee (free samples available from their website). If you don't gel your flash, you'll get a weird color mix that is almost impossible to compensate for unless you merge two images with different WB settings in Photoshop. Also, shoot RAW, which will allow you to tweak your WB later.
2nd qn i wanna ask.. so if i shoot with flash under fluorescent lightings, i set the WB to fluorescent light, gel the flash with plus green filter and i should get the right colour right?

i tried doing so but end up with a blue cast on my entire pic. i am colourblind so i cant really tell the diff until i asked my sister. :cry:
 

tecnica

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well to give you a practical solution, i do alot of event coverage indoors so... to counter the flickering effect, i shoot in 2-3 shot bursts for the same scene. Out of the 2 or 3, you'll get at least 1 shot without the problem..
point noted, thanks for sharing.

but 1/60s abit slow huh
 

catchlights

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from the link nightmare posted:



2nd qn i wanna ask.. so if i shoot with flash under fluorescent lightings, i set the WB to fluorescent light, gel the flash with plus green filter and i should get the right colour right?

i tried doing so but end up with a blue cast on my entire pic. i am colourblind so i cant really tell the diff until i asked my sister. :cry:
are you such no mixed with daylight?

anyway, not all fluorescent are the same,

there are cool white, warm white, natural white, super white, daylight, etc, so shooting with fluorescent is always a headache.
 

catchlights

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from the link nightmare posted:



2nd qn i wanna ask.. so if i shoot with flash under fluorescent lightings, i set the WB to fluorescent light, gel the flash with plus green filter and i should get the right colour right?

i tried doing so but end up with a blue cast on my entire pic. i am colourblind so i cant really tell the diff until i asked my sister. :cry:
FYI, female very rare to have colorblindness, and they usually have better sense on colors, able to tell the subtle difference on colors.
 

tecnica

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are you such no mixed with daylight?

anyway, not all fluorescent are the same,

there are cool white, warm white, natural white, super white, daylight, etc, so shooting with fluorescent is always a headache.
never mix with daylight cause i was testing my new filters at night in my living room. :dunno:

FYI, female very rare to have colorblindness, and they usually have better sense on colors, able to tell the subtle difference on colors.
yeah.. i think something to do with the male chromosomes or something..
 

spawnx

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Dec 11, 2008
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point noted, thanks for sharing.

but 1/60s abit slow huh
nopes i've used the same technique for 1/100 right through to 1/500+...
 

GRbenji

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May 24, 2010
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Local power supply is 50 Hz (not 60 Hz), ie 50 cycles per second, which means 1/50s per cycle. Need to capture at least half cycle which means highest shutter speed is 1/100s or multiple(s) of 1/100s.
 

sinned79

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ermm... u using wide aperture aperture (f1.8), why still need ISO 1600? ISO 400-800 should be enough loh.
 

tecnica

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ermm... u using wide aperture aperture (f1.8), why still need ISO 1600? ISO 400-800 should be enough loh.
cos i was using my kit lens before that.. forget to change...