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- Name
- Ben
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I recently bought a kippered example of the above lens with the intention of fixing it
I was lead to believe the 'normal' fault with these is an error 01/99 that's caused by the APERTURE flex cable flexing over the years and cracking.
however the lens I have has a focus issue that see's it hunt for focus at the upper ends of the zoom range (above 40 odd mm) and be totally hit and miss as to if it does eventually focus. sometimes it beeps focus and flashes in the viewfinder when its so far out of focus its laughable
as such I am now unsure as to if replacing the aperture cable is going to go anywhere to fixing this focus issue or are the two intertwined? either way its definitely not causing a visible/flagged error on the camera, it just wont focus correctly in AF mode
could it be dirty contacts elsewhere, I have read about the photocoupler or something that's part of the USM motor? could be the issue?
anyone actually got real first hand experience of this fault (not the error 99 one) and managed to fix it?
cheers
Ben
I was lead to believe the 'normal' fault with these is an error 01/99 that's caused by the APERTURE flex cable flexing over the years and cracking.
however the lens I have has a focus issue that see's it hunt for focus at the upper ends of the zoom range (above 40 odd mm) and be totally hit and miss as to if it does eventually focus. sometimes it beeps focus and flashes in the viewfinder when its so far out of focus its laughable
as such I am now unsure as to if replacing the aperture cable is going to go anywhere to fixing this focus issue or are the two intertwined? either way its definitely not causing a visible/flagged error on the camera, it just wont focus correctly in AF mode
could it be dirty contacts elsewhere, I have read about the photocoupler or something that's part of the USM motor? could be the issue?
anyone actually got real first hand experience of this fault (not the error 99 one) and managed to fix it?
cheers
Ben
