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FORUMS Cameras, Lenses & Accessories Canon Digital Cameras 
Thread started 12 Oct 2007 (Friday) 00:20
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40D Top LCD

 
canon ­ shooter
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Oct 12, 2007 00:20 |  #1

I notice sometimes, not all the time there is a dark spot on the top LCD. Looks like a burned spot in the far left side. Never noticed this on my 20D.

Today I saw it again (while outside). A few hours later I looked at it inside and could not see it and it looked same as the 20D.

Any idea as to what could be happening here?


Jim

5D Mark III Grip, 40D Grip, Canon 17-40L, Canon 24-105 F4L IS, Canon 70-200 IS II F2.8L, Canon 100-400L, Canon 50 F1.4, Canon 100 F2.8, Canon 580 EX
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kcbrown
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Oct 12, 2007 00:32 |  #2

I've noticed the same thing, and only outside.

I figure it's the LCD polarizer element interacting with the sunlight. There doesn't seem to be any correlation with how long the camera's been on or anything of that sort, so it's almost certainly not heat related (which is what I initially suspected).

The polarizer element is a thin sheet that is usually the top layer of the display. Check out this Wikipedia article for a more complete description of how LCDs work: http://en.wikipedia.or​g/wiki/Liquid_crystal_​display (external link).


"There are some things that money can't buy, but they aren't Ls and aren't worth having" -- Shooter-boy
Canon: 2 x 7D, Sigma 17-50 f/2.8 OS, 55-250 IS, Sigma 8-16, 24-105L, Sigma 50/1.4, other assorted primes, and a 430EX.
Nikon: D750, D600, 24-85 VR, 50 f/1.8G, 85 f/1.8G, Tamron 24-70 VC, Tamron 70-300 VC.

  
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canon ­ shooter
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Oct 12, 2007 00:36 |  #3

kcbrown wrote in post #4109619 (external link)
I've noticed the same thing, and only outside.

I figure it's the LCD polarizer element interacting with the sunlight. There doesn't seem to be any correlation with how long the camera's been on or anything of that sort, so it's almost certainly not heat related (which is what I initially suspected).

The polarizer element is a thin sheet that is usually the top layer of the display. Check out this Wikipedia article for a more complete description of how LCDs work: http://en.wikipedia.or​g/wiki/Liquid_crystal_​display. (external link)

Thanks, that makes sense. I was ready to take it in for repair


Jim

5D Mark III Grip, 40D Grip, Canon 17-40L, Canon 24-105 F4L IS, Canon 70-200 IS II F2.8L, Canon 100-400L, Canon 50 F1.4, Canon 100 F2.8, Canon 580 EX
It's the Glass that Counts!

  
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IB///M
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Oct 12, 2007 00:48 |  #4

ya, it freaked me out at first too, lol


5D mark II
17-40 f/4 L | 35 f/1.4 L | 70-200 f/2.8 IS L | 400 f/5.6 L | Kenko 1.4x | 580 EX II

  
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Hermeto
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Oct 12, 2007 00:53 |  #5
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Same here.
Looked like burned spot at first..


What we see depends mainly on what we look for.

  
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40D Top LCD
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