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07/08/2009 07:13:25 PM · #1 |
The other day I realized the view was dirty through the viewfinder, so I cleaned the sensor 2-3 times... and got the same results. Then I cleaned the mirror and viewfinder on the outside... same thing. So I thought it must be the focus screen. So this morning I set out to do something I thought would be easy: I downloaded some PDF with focusing screen replacing instructions for the Canon 20D and started looking for the little metal tab on the bracket that holds everything together up there... I could not find it; so I had this brilliant idea of removing the 2 screws holding a plastic bracket above the mirror - after all, this would make it all that much easier to slide out the screen and clean it up.
And then it all went wrong.
As soon as I started loosening the second screw, the metal bracket, focus screen, trim ring (rectangle) and another focus screen fell onto the mirror. "Shit!" I thought, err.. said out loud. There's nothing in the manual about this much stuff!! How do I put it all back together??
Now I love taking things apart and figuring out how they work - I'm an engineer after all. But this proved to be the most stubborn process of them all!! Everything got dirty real fast, and proved to be a nuisance to clean again, and again, and again. Finally I got everything back in there, looked through the viewfinder (it was so dirty!) and put a lens on... it was all out of focus! So it all came back out. Then after much cleaning and assembly, I put the lens on, and found the red lights didn't light up the squares on the focus ring... All out I say! Then I did the following: cleaned everything again (used some 40 non-abrasive wipes by now, including some Eclipse sensor cleaning solution), put the focus screen with the squares with the step facing the top side of the camera, the metal trim onto it with the tab on the left side, screwed in the plastic cover, put the matte focus screen with its step facing the top of the camera, managed to insert the metal bracket in both little holes in the bottom and lock into place... looked through the viewfinder and found almost nothing, placed the lens on... and ta-da! A sharp, virtually clean view (managed to scratch one screen on the bottom right), and it only took... 4 hours!!
Never again! Next time I'll try to find someone else to do it.
PS: cleaning the sensor is easy compared to this! |
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07/08/2009 07:26:35 PM · #2 |
talk to  dknourek he dropped his in the water, then undid every screw he could find, he knows what he is doing , seeing as his camera works again |
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07/08/2009 07:32:07 PM · #3 |
One of the biggest negatives of being an Engineer..........
"How does this work..........Bugger, how does this go together again?"
I know the feeling..................... |
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07/08/2009 10:24:25 PM · #4 |
lol thanks sweets ;)
yea I took my XTi pretty close to completely apart, Im not an engineer but have been taking things apart and getting them back together since I was old enough to hold a screwdriver. I liked seeing how things work and have an extremely good memory for the way I disassemble things, or if I get nervous then I take LOTS of photos of the disassembly to ease the process of getting it back together again.
-dave |
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07/08/2009 11:17:20 PM · #5 |
| Just don't ask him how often he hurts himself while trying to fix things ;) |
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07/08/2009 11:44:43 PM · #6 |
There is a reason Canon service centers are there.
Matt |
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07/09/2009 12:22:33 AM · #7 |
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07/11/2009 10:56:59 AM · #8 |
| I ended up buying a new focus screen when I slipped with the screwdriver and put a nice big scratch on it! |
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