Question about Canon EF 100-400mm f/4.5-5.6 IS USM Lens
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Posted on Jan 02, 2017
You can order directly from Canon USA,
Canon's info: To order an internal replacement part, please call 1-800-828-4040. The hours of operation are 9:00 A.M. to 8:00 P.M. EST from Monday to Friday. When calling, speak the term "order parts" when the speech routing system asks the reason for your call. You will immediately be routed to the Parts Desk for assistance.
Posted on Jan 30, 2008
SOURCE: Lense on Cannon sureshot
Not really, zoom lenses are pretty fragile and will permanently be damaged when they get a shock. Most probably the guide rails/pins are damaged inside, and it will need luck and patience to glue them in place (and most of the times glue isn't strong enough to keep them together).
Better sell it for parts on ebay and get yourself a new one (most of the times broken fetch half price of used ones). People need different parts (i.e., the mount, motors, aperture assembly), and it is environmentally great to recycle goods for reuse by other repairers...
Posted on Sep 21, 2008
SOURCE: Cannon lenses
All canon EF lenses (and compatibles e.g. Sigma EX) can be used with both analog and digital EOS-bodies. Depending on the sensor size (usually smaller than a 35 mm negative) a crop-factor due to the smaller field of view must be considered. Example: Canon EF 50mm/1.8 lens used on a digital EOS (40D, crop factor 1.6) equals a 80mm lens (50mm x 1.6) compared to analog cameras using 35mm film. Some digital EOS-models can also use EF-S lens-series.
Posted on Nov 28, 2008
SOURCE: EF 24-70 lens droop...
The zoom creep is an easy fix for Canon. I really do not recommend trying to tighten it yourself, since that would void your warranty.
It is usually free to tighten the zoom ring.
Posted on Jan 19, 2009
Slide a piece of paper partway under the ring (make sure you leave enough hanging out so you can remove it later) and see if that tightens the action some.
Another low-tech approach is to push the ring to expose the inner barrel, then attack one or more pieces of Scotch tape or masking tape.
Posted on Feb 05, 2010
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