Question about Canon EF 70-300mm f/4-5.6 IS USM Lens
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Posted on Jan 02, 2017
Here is a link to many Canon products in PDF form: Canon Parts Lists
Unfortunately, the only 300mm 2.8 lens listed is the IS version
The procedure is not that complicated, but you need to pay attention to the connections on the circuit board. The mount is removed, and you need to remove the small screws that hold the connector board to the mount ring first.
I cannot do live chat due to I use a Mac, but I will monitor the thread if you have questions,
Posted on Mar 24, 2008
SOURCE: Canon Rebel XTI Ef-S Lens stuck
Hello Pittsburgh! I lived there for 3 years! Dreadful city. :-)
Now, your lens must have a problem with the guide rails/pins. If you dropped it or bumped it, you might have broken/damaged those guide rails. Another reason might be sand/grit in the zoom mechanism.
You may try stripping the lens slowly and see if you can identify the problem. Most lenses are easy to disassemble, you start from the rear mount area, take off screws, and parts one by one, and be organized (i.e., take photos for every step and don't mix the screws).
Posted on Sep 21, 2008
A stuck lens cover is a fairly common problem, but it is normally easy to fix. A single grain of sand jamming the cover mechanism is normally the culprit, and you want to try to dislodge it: 1) Try blowing compressed air around the lens cover to clean the mechanism. Or use a hair dryer for a few seconds (don't want to heat up the camera). Use no heat mode if possible. 2) Gently slide a thin strip of paper between the lens cover shutters and the outer support ring. Work it around 360 degres to clear out any debris that may be in there. 3) With the lens barrel extended and pointed downward, tap the lens barrel with a pencil while you extend and retract the lens by powering the camera on and off. Repeat the above three steps several times. If repeated tries don't work (keeping in mind that it usually does), it then may be necessary to open the lens barrel to access the lens cover mechanism.
You can open the lens barrel up to fiix the covers, but only as a very last resort. The above procedures normally work if you try them enough. But for those particularly nasty stuck mechanisms, here's an example repair on a Canon Powershot A400 (do this at your own risk, and it will void your warranty):
Posted on Apr 18, 2009
SOURCE: looking for a manual
I coulnd't find a manual. I did see a detailed specification page here:
It shows no manual is available for the lens.
Posted on Jul 18, 2009
You have to disassembly your camera for it, including the lens assembly.
Even if you have experience and skills in fixing electronic devices, I don't recommend it, since any particle of dust will get inside the lens and your camera, and will affect it.
The recommended place to perfom such cleaning activity is a Clean room (class 3 or higher), and have handy the proper cleaning tools.
Disassembling the lens is tricky and also needs a lot of patience and technique skills to do it properly.
Imagine that by accident a spring pops up a tiny metal ball (1.5 mm diameter) and you lose it in your home, then because of it, your lens will not work properly.
If it has warranty, I do recommend you to send it to cleainig to a professional repair and cleaning service.
If still you have questions or doubts, or need a cheaper quote for it (after get some quotes from local repair centers for comparison), you can contact the ebay seller Great_items_2004
Posted on Jul 25, 2009
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