veiw finder cleaning

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derrycity

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phil
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is it possible to clean the veiw finder
i was abit shocked today to find a very small insect moving around inside the veiw finder as i thought the canon 40d was air tight.
 
Make a friend of it, give it a name like Pat or Mick. Seriously though take out the focus screen then give it a good blow.
 
Nothing like a good blow:D
 
IIRC, there are screen removal instructions on the Kats Eye site.

Be very careful when removing/replacing the screen, they're quite easy to damage, as is the mirror assembly which is rather close to the screen frame during removal/replacement. It might be cheaper in the long run to get the viewfinder cleared profesionally.
 
never blow inside the camera with your mouth, and never touch anything in there with your fingers

somebody here once recommended some good tips aimed at sensor cleaning, but they'd apply here too. Run a sink / hot bath in the the bathroom, closed windows, nice and steamy for a few minutes, wait for it to clear, the water condensing on the dust in the air will drop the dust in the air to the floor, then setup camera on tripod, with lens facing downward, remove lens, blow out camera interior with rocket blower, keep the end of the nozzle clear of camera innards.
 
Oh what a load of wimps you are. On the old Canon F1n, Canon supply a range of focussing screens for different jobs.
 
classcams said:
Oh what a load of wimps you are. On the old Canon F1n, Canon supply a range of focussing screens for different jobs.
Click to expand...

Yes but easily replaceable screens aren't quite as common in DSLRs. On some older SLRs, the entire pentaprism unit is removeable, allowing easy access to the screen, with little chance of damaging the mirror. Peeking at a May ad for WHE in AP, I see that alternative screens are listed for 5Ds and 1D MkIIIs but not for the 40D which suggests to me that it's not really a user serviceable part, although I'm sure anyone with a steady hand and the right tools (and confidence) can do the job. I'm fairly sure I could do it BUT I'm equally sure that I won't be gambling with my D700, although I might with the D70.
 
The 40D does have a user replaceable focus screen, I had a Ef-D grid screen fitted to mine when I had it.

To the OP, if you have an insect in there I would personally get Canon to have a look instead. I could have left debris on the AF point display screen or the focus screen or even on the bottom of the penta-prism.
 
thanks for your feed back on this
hopfully the insect dies in the corner i'll have to wait and see if it affects the function of the camera.
 
We used to get this a lot in 'ye olden days of filme' - small bugs would eat the residue left from scraps of film emulsion (made from beef gelatin).
Some people got really bad infestations that had to be fumigated...
 
What if it lays eggs?:p:D
 
Its a piece of **** to open the latch that holds the focus screen in place if you remove the lens you can see a little tab that's central in the top of the opening, flick it down with a biro pen top or something similar that wont scratch anything.

You can then get a rocket blower aimed in there to clean it out.
 
:p:D:clap:
 
haggisuk said:
Its a piece of **** to open the latch that holds the focus screen in place if you remove the lens you can see a little tab that's central in the top of the opening, flick it down with a biro pen top or something similar that wont scratch anything.

You can then get a rocket blower aimed in there to clean it out.
Click to expand...

One thing to do first is put a piece of lens tissue on the mirror - that way if the holding catch pops down it is far less likely to scratch the mirror itself.
 
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