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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 09 Sep 2010 (Thursday) 15:41
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Can I stick a brush onto the transmittive LCD?

 
slr_noob
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Sep 09, 2010 15:41 |  #1

I've just discovered a spec of something on my viewfinder. I couldn't blow it out, so the next thing I'm trying is a brush or a lint-free cloth and see if it's on or after the transmittive LCD/focus screen.

Perhaps I should take it to some reputable camera shop? Or I really should have Canon to get that taken care of?


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krb
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Sep 09, 2010 15:42 |  #2

it won't show up in images so you could always just ignore it until you have some other reason to send it in.


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lannes
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Sep 09, 2010 21:28 |  #3

I would not touch the transmissive lcd, it would be an expensive replacement if damaged, can you actually see the dust on on the outer surface, having used a blower it might be already further inside the pentaprism.


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slr_noob
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Sep 11, 2010 03:26 |  #4

The thing is I'm not sure what it really because it looked like a glob of grease when I first notice it.


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krb
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Sep 11, 2010 10:27 |  #5

slr_noob wrote in post #10888853 (external link)
The thing is I'm not sure what it really because it looked like a glob of grease when I first notice it.

It might be a bit of oil thrown off the mirror mechanism. Still won't effect the final image.


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slr_noob
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Sep 11, 2010 13:31 |  #6

Well, at least according to dpreview, there's a focusing screen before the LCD. I tried to use a brush to get in there and also carefully use a cloth (the kind that you clean lenses) to wipe on the focusing screen and so far it looks like something is dented instead of dirt went in there :(. I'll take it to a local camera shop and see what they can find.


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krb
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Sep 11, 2010 15:00 |  #7

That focusing screen is the delicate part.


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slr_noob
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Sep 11, 2010 15:36 |  #8

True. However, it seems like it's behind the focus screen after I used a brush to gently go over that particular area. Using a cloth (more like the kind you clean lenses/glasses with) doesn't help either.


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lannes
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Sep 11, 2010 21:05 |  #9

slr_noob wrote in post #10890865 (external link)
True. However, it seems like it's behind the focus screen after I used a brush to gently go over that particular area. Using a cloth (more like the kind you clean lenses/glasses with) doesn't help either.

For the focusing screen, just remove it and user a blower on each side.
Here is the process

http://www.katzeyeopti​cs.com/files/install_1​2.pdf (external link)

Also wash your brush in 100% Isopropyl alcohol to remove any dirt and oils which may smear the screens.
Are you using a non shedding anti-static sensor brush ? otherwise you might be adding more dust than your removing.

Don't be tempted to use the blower on the focusing screen it while it's in the mirror box. Always use the blower outside the mirror box, or only on the sensor.

The transmissive lcd needs to be cleaned by Canon,


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PacAce
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Sep 11, 2010 21:32 |  #10

What transmissive LCD are you folks talking about? :confused: There is no LCD inside the camera mirror box. The closest thing that comes to it is the LCD display screen at the back of the camera. What's inside the mirror box behind the shutter curtain is the image sensor.


...Leo

  
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krb
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Sep 11, 2010 21:33 |  #11

PacAce wrote in post #10892181 (external link)
What transmissive LCD are you folks talking about? :confused: There is no LCD inside the camera mirror box. The closest thing that comes to it is the LCD display screen at the back of the camera. What's inside the mirror box behind the shutter curtain is the image sensor.

The 7D uses a transmissive LCD in teh viewfinder to display focus points, grid lines and the spot metering circle.


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PacAce
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Sep 11, 2010 21:36 |  #12

krb wrote in post #10892188 (external link)
The 7D uses a transmissive LCD in teh viewfinder to display focus points, grid lines and the spot metering circle.

Ah, yes, forgot about the 7D. Sorry.  :o


...Leo

  
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Can I stick a brush onto the transmittive LCD?
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