was taking pics for a customer and some shots came out WEIRD

[aznkid.com]

i think this is called banding..i was shooting in JPEG and not RAW

http://www.aznkid.com/problem1.jpg

http://www.aznkid.com/problem2.jpg

anyone know what causes this?

cam: digital rebel
lens: 50mm f/1.8
wb: custom

i get this wacky gradient in the pics..turned the cam on/off, took the lens on/off.. changed WB..kinda fixes itself after a while..[/img]

[Olegis]

Severely under-exposed with wierd WB ?

[aznkid.com]

how could a weird white balance cause gradients though? i would understand if it caused a general tone to the images..not to mention i didn't change my settings before these pics came up nor did i change them after

[BearSummer]

Hi Aznkid.com,

It looks similar to what happens if you are using flash and set the sync speed to fast. If you were using only a small amount of fill flash that would explain the different colouration where the bottom of the frame is not getting any flash light and the top part is.

best regards

BearSummer

[Jon]

Sync problems usually have a sharper edge than that. What were the lighting conditions and camera settings aside from image type?

[aznkid.com]

flash was NOT used and the lighting was flourescent

[photoguynorth]

Was there another light source? It looks like mixed light - although that would not explain why it went away.....

[aznkid.com]

nope..just one source of light..like i said, it only popped up for a few shots..my settings didn't change throughout the entire shoot!

weird eh?

[slin100]

I wonder if this could have been caused by fluorescent light flicker? Older-style fluorescent lights have ballasts that cycle at a low frequency (some multiple of AC like 120 Hz). It's, therefore, possible to capture an image when the light is technically off.

This effect is common in gynasiums and is the bane of indoor sports shooters.

[aznkid.com]

hmm..that could be possible..except would it happen to the whole room or each tube seperately? because the room is being lit by 6-8 of em!

[RichardtheSane]

You may only get a noticable flicker from the one that is the primary light source. Or maybe the flicker falls in time with the way the AC current actually alternates, hence the flicker being similar.

What was your shutter speed?

[DocFrankenstein]

May be defective shutter.