BennyBoo
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- Ben
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So, Couldn't find a thread about personal experiences..
I'll start.
I borrowed my step dad's Canon 100-400mm F4L lens for an airshow..
He's had it a good few years and about 2 years ago it started to get very stiff to use the zoom/manual focus.. Auto focus worked fine.
The barrel has been scratched quite badly, when using the zoom, all the scratchings have made their way inside, causing the lens to be badly dusted..
When I borrowed it, i decided to get it sent off to Canon for a refurb (as kind of payment for the loan) but they said it would be about 2 weeks away (not a bad time, but he needed it back in two weeks and couldn't risk the timescale)
I decided to see what i could do :|
I used the tiny screwdriver set I had laying around and set about tacking the end off, then the next layer, then the next..
Long story short, it now works perfect and is dust free
I was abit nervous when i realised how far i'd gone, but the results were perfect.
I don't think I would do anything like that again to such an expensive lens..
So, your turn!
I'll start.
I borrowed my step dad's Canon 100-400mm F4L lens for an airshow..
He's had it a good few years and about 2 years ago it started to get very stiff to use the zoom/manual focus.. Auto focus worked fine.
The barrel has been scratched quite badly, when using the zoom, all the scratchings have made their way inside, causing the lens to be badly dusted..
When I borrowed it, i decided to get it sent off to Canon for a refurb (as kind of payment for the loan) but they said it would be about 2 weeks away (not a bad time, but he needed it back in two weeks and couldn't risk the timescale)
I decided to see what i could do :|
I used the tiny screwdriver set I had laying around and set about tacking the end off, then the next layer, then the next..
Long story short, it now works perfect and is dust free

I was abit nervous when i realised how far i'd gone, but the results were perfect.
I don't think I would do anything like that again to such an expensive lens..
So, your turn!