Canon EF-S 17-55 f/2.8 IS USM Lens "00" Questions

M/A focas switch I have older canon 75-300 zoom lens and the button (M/A) focus switch has come off...been searching to parts manual, but not real handy on line...know where I can get a replacement ...

Tried to take photos today with Canon EF-S 17-85MM F/4-5.6 IS USM lens on Canon 40D, aperture reads 00, can't use aperture priority mode as won't change from 00, displays 00 in all modes including the

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Tried to take photos today with Canon EF-S 17-85MM F/4-5.6 IS USM lens on Canon 40D, aperture reads 00, can't use aperture priority mode as won't change from 00, displays 00 in all modes including the

00 on the F info (aperture shows 00) the lenshave perfect contacts (absolutly remarkable) and the lens quite often stop working, showing 00 as aperture size.already tryed it in 3 diferent canon bodys

...manual and I am NOT a camera geek). If you look at the front of the camera, there is a button at 3:00 next to the lens mount. Push the button in and rotate the lens clockwise till it stops, about

Broken ring around 75-300 zoom lense Broken ring that is attached with 3 tiny screws onto 75-300mm lense. Where can I purchase a new ring? This is the ring that accepts the filters etc.? Thank ...

...lens. If you unscrew the lens halfway you'll see it still says MF but the aperture will turn to "00". Use a clean pencil eraser to clean the contacts on the back of the lens and try

...af nikon lens diaphragm lock The diaphragm lock on my 20mm 2.8 AF Nikon locks but the camera (D100) it's on doesn't see that its locked anymore? HELP! I'll offer the same answer I just gave on a ...

error 00 i can't take a pictures even see a pictures before because when i opened it the error 00 will come out . what should i do? Always when an error occurs, switch off the camera. Wait till the ...