Canon EF 70-200mm f/2.8L IS USM Autofocus Lens "usm" Questions

...in the full Macro position. The Macro ring turns with no effect. Anyone know how to fix this? The USM focus works by applying pressure to a set of rollers. That pressure is achieved with a large ...

i need the part number for the focusing unit ( USM motor) for the efs 17-85. THanks!!!!! Afternoon, for the Canon 17 to 80 5F4 to 5.6image stabilized USM lens is as follows YG2-2140-000 the net cost ...

I am looking for a canon manual for their 70-200mm f2.8 l usm lens. http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_70_200mm_f_2_8l_usm#BrochuresAndManuals

how to take apart Canon EF 28-135mm f/3.5-5.6 IS how to take apart Canon EF 28-135mm f/3.5-5.6 IS USM Lens Having gone over a month with no response, I assume this is no longer a problem.

Canon EF 70 -200mm F2.8L IS USM will not auto focus sometimes (using a 2x converter) Check out the Canon guide for converters Some will not auto focus with a converter and you can only use manual ...

MY CANON EF 100-400MM USM LENS WON'T ZOOM PAST 150MM Is the lens tension adjusting ring too tight? Try loosening it and see if you get increased travel. If so, you may need to have it checked out.

Need a manual for cannon EFS17-85mm Need to down load a manual for Canon EF-S 17-85MM F/4-5.6 IS USM Lens You may download a copy of the manual here.

Canon 75-300mm USM III, was initially working fine My Canon 75-300mm USM III, was initially working fine whilst on holiday (in India) and then all of a sudden it would no longer trigger. All it does ...

Canon EF-S 17-85MM F/4-5.6 IS USM Lens I need to down load a manual on Canon EF-S 17-85MM F/4-5.6 IS USM Lens http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved

Trying to find on-line instruction manual for Canon EF 75-300mm f/4.0-5.6 IS USM Lenses don't usually need instruction manuals, only specifications. What do you want to know? Maybe i can help answer ...