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Evand
Tinkerer
Username: Evand
Post Number: 3
Registered: 01-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 24, 2007 - 06:28 pm: | 
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A canon FTb was just passed down to me. It seems to be in good shape except that the mirror will often lock into the up position without engaging the MLU function. This happens maybe 1 time per 7 releases. Is this a common problem? Is it easily solved? |
Rick_oleson
Tinkerer
Username: Rick_oleson
Post Number: 190
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 24, 2007 - 08:58 pm: |
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Does it behave the same way without a lens attached? Sometimes a sticky lens can make a camera hang up. |
Evand
Tinkerer
Username: Evand
Post Number: 4
Registered: 01-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 25, 2007 - 05:47 pm: |
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It does. |
Rick_oleson
Tinkerer
Username: Rick_oleson
Post Number: 191
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 25, 2007 - 07:05 pm: |
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then i'd guess that the mirror linkage needs cleaning... not as easy as swapping lenses... |
Glenn
Tinkerer
Username: Glenn
Post Number: 138
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 25, 2007 - 08:11 pm: |
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Check that the rubber foam buffer strip, along the front edge of the focus screen, is not degrading and going sticky. Degrading foam can sometimes cause the occasional hang-up. |
Rick_oleson
Tinkerer
Username: Rick_oleson
Post Number: 192
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 25, 2007 - 09:58 pm: |
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Well, now i feel dumb... of course, that would be the first place to look.
While the mirror is stuck in the up position, try pulling down on its front edge very gently with a fingernail. If it pops right down, it's just sticky foam; email jon_goodman@yahoo.com for an immediate and cheap (under $10) solution. If it resists and goes back up when you let go of it, you have a more serious problem. |
Evand
Tinkerer
Username: Evand
Post Number: 5
Registered: 01-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 27, 2007 - 05:49 am: |
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Er, it snaps back up on me if I pull it down. What might this more serious problem be? |
Glenn
Tinkerer
Username: Glenn
Post Number: 139
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 27, 2007 - 07:49 am: |
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First area to inspect/clean should be the mirror lock-up mechanism. Make sure that degraded foam/dirt are not restricting movement. You could just try working the mlu lever a few times to see if this frees anything up. I had one FTb where just removing the levers, on front of body and replacing them, cured the problem. |
Evand
Tinkerer
Username: Evand
Post Number: 6
Registered: 01-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 28, 2007 - 07:35 am: |
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Hmm. I don't think I'm really qualified to reassemble my camera, and I don't feel like paying to have it repaired. I guess it'll be sitting on the shelf for a while. |
