Anyone what happen to the lens?


voice123

Senior Member
Jan 16, 2012
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16
Singapore
Any expert have idea what is wrong?

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sometime brown images
 

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shutter speed not in sync with the frequency of the fluorescent light.
 

there is a lamp on top of me, is that the cause of the problem? so its not lens spoilt ?
 

I suspect it's the lighting... Fluorescent light. By any chance you are shooting at a fast shutter speed? e.g. 1/160?
 

ok thanks..i was testing lens and first time encounter this.

You will encounter more of these when you shoot indoors fast paced events lighted by fluorescent lighting.
 

Shoot below 1/60 and you shouldn't see this. What you see is the refresh of your light.
 

at first i tot it was lens coating problem,then i mount lens hood..still the same haha..
den i change another camera body also has the same thing..
so i tot is lens spoilt
 

at first i tot it was lens coating problem,then i mount lens hood..still the same haha..
den i change another camera body also has the same thing..
so i tot is lens spoilt
Whenever something strange happens: at first check everything outside the camera. Most errors or problems come from behind the viewfinder - and your case is no exception.
 

it's optical aliasing. your sample rate 1250 Hz and fluorescent flickering rate 60 Hz...
 

Whenever something strange happens: at first check everything outside the camera. Most errors or problems come from behind the viewfinder - and your case is no exception.
whenever something goes wrong, our first respond is "Not me!"

It's dated from since Adam and Eve. It's hardwired into our gene. ;)

So there's no exception in modern days.
 

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Shoot below 1/60 and you shouldn't see this. What you see is the refresh of your light.

Thanks. This is also new to me. :embrass:
 

Since our power is 50hz, shooting at shutter speed below 1/100s will solve the problem.
 

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