Question about Canon EF 70-300mm f/4-5.6 IS USM Lens

Open Question

Hi I have a Canon EF 70-300mm f/4-5.6 IS USM lens that has two spec of white dust or dirt on the inside of the rear glass. One spec of dirt is lager then the other. What can I do? Please help. Thanks so much

Posted by on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

cammedic
  • 667 Answers

SOURCE: I have a Canon EF 300mm f/2.8L USM Lens

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,

Kevin

Posted on Mar 24, 2008

koraypek
  • 6 Answers

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).

Good luck.

K.

Posted on Sep 21, 2008

t00nz
  • 4738 Answers

SOURCE: Lens cover won't close and there is internal dust

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):

http://camerarepair.blogspot.com/2007/11/repair-of-stuck-lens-covers.html

Posted on Apr 18, 2009

  • 119 Answers

SOURCE: looking for a manual

I coulnd't find a manual. I did see a detailed specification page here:
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=150&modelid=9996#DownloadDetailAct

It shows no manual is available for the lens.

Posted on Jul 18, 2009

  • 164 Answers

SOURCE: see dust or drop of water on my pic canon sx10 is

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

Best regards,

Posted on Jul 25, 2009

Testimonial: "THANK YOU"

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Err 01


If you got what some call "pumping" or "hunting" focusing, the lens tries to focus but seem to be unable and ends with a clearly unfocused image. Then your lens is dirty inside.

You can fix it yourself - BUT...

DONT DO IT, IF YOU HAVE TEN THUMBS, If you break it - i warned you right here - i am not to blame - DONT DO IT!

Well, its kind of hard to describe, but i will try anyway.





If you have disassembled your lens so much that you have the usm part as a separate unit, then try an have a look inside the usm tube to see what happens when you manually change the focus.



Inside the tube there is a small slit where the optical sensor is

hidden, you can\'t get to it without removing the rear part of the usm

unit. This is tricky, because one of the flat cables is taped to the

inside of the tube. You\'ll have to gently remove this cable from

the tube - WARNING: these cables are very sensitive to pulling, they

will break if you pull it too hard. (This is probably why Canon Service Centers are replacing the complete USM unit, instead of trying to repair the darn thing)



After the rear part has been removed, you should be able to see the

plastic/glass sensor plate about a 1/4 of the diameter of the tube.



DON\'T touch this plastic/glass thing with anything hard, use a fine (new) paint brush to clean it. If you have a magnifier about 5x to 8x, you should be able to see that the sensorplate is dirty.



Try to move the sensor itself (not the plate) by manually focussing, so that you can clean the plate beneath it.



put the lens back together, it worked wonderfully with my lens. Will it work with yours? don\'t know.



And as always, you are on your own, if you break it - your problem, not mine!

Cheers

Per

cbf17d00-1c8b-4cdd-88d2-817562fc421e.jpg

Mar 02, 2014 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

2 Answers

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=0CHoQFjAA&url=http%3A%2F%2Fmedia.the-digital-picture.com%2FOwners-Manuals%2FCanon-EF-S-17-85mm-f-4-5.6-IS-USM-Lens.pdf&ei=mncUUJ3EOYnm9ATK2YCQBA&usg=AFQjCNHJaSazpAGakXjAkYnWzbV5ygWbrQ&sig2=SYGmYEaxlwZ3Rhv2yzgFZA

Jul 28, 2012 | Cameras

1 Answer

My lens locked suddenly Canon EF-S 17-85mm f/4-5.6 IS USM Lens on a 20D body


Possible power problem make sure the camera has sufficient battery power and is functioning as it should (less the lens) if this is okay then the problem is between the lens and body gold contacts. It's a quick and easy repair you can do yourself. Shut the camera off remove the lens and put the body cap on the camera if you don't have a body cap place the camera on a clean lint free surface like a glass table or counter top. Use a new clean red pencil eraser to gently rub the gold contacts on the lens. Hold the lens as vertical as possible when you are doing this to minimize the rubber dust getting into the rear lens element. Clean the area of rubber dust with a puffer blower or lens cloth not a tissue. Set the lens down on the clean lint free surface and gently clean the gold contacts in the camera body keeping the camera lens mount down to minimize any rubber dust from getting into the sensor area. Clean the contacts with a lens cloth only do not use a blower/puffer, re-install the lens and it should come on. When installing the lens make sure it makes a solid click and locks securely in place.

Jan 06, 2011 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

Focus hutning with Canon EF-S 17-85mm f/4-5.6 Image Stabilized


I had this problem too, then my camera started getting Error 99 (there is some problem) and not working.
If you look at this website and follow the steps under Update 2
http://www.richardsnotes.org/archives/2005/04/29/50mm-lens-contact-points/
I think you will fix your problem. The connections between lens and camera probably have a little dust in them, use a soft rubber eraser to clean them. Make sure no dust or pieces fall into the camera or lens when cleaning!

Jul 28, 2009 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

New Camera


Get the Canon EF 70-300mm IS USM about $500 and EFS 17-85mm IS USM about $300. The 75-300 all of them I would not use them 4 a body cap. Camera is fine or step up to XSI.

Jun 10, 2009 | Canon Zoom Telephoto EF 75-300mm f/4.0-5.6...

1 Answer

Dust inside the canon ef 24 85mm lens


CAUTION! DO NOT EVEN THINK ABOUT DISASSEMBLING YOUR LENS. In 1964, I made the mistake of doing the same thing for a single focal-length lens for my Nikon F. This lens did not even approach the mechanical complexity of a modern zoom lens. Lenses are put together like jigsaw puzzles. I removed one screw and found to go further, I needed to do another. In fifteen minutes, the lens was in 50 pieces on the table. It cost over $175 to have a camera repair man reassemble it. This was a a time when the top of the line Nikon sold for $300 vs. $5000 today. Usually dust between elements does not affect performance, but if it is degrading your pictures, take the lens to a professional. This is not a job for an amateur.

Nov 21, 2008 | Canon 24-85mm f/3.5-4.5 EF USM Lens

1 Answer

Canon EF-S 17-85MM F/4-5.6 IS USM prevents features from working on 40D


something sounds strange about this. aperture 00 is an invalid aperture value. stands to reason if that is the case the camera would complain about it. via error code. being that its only six mos. old i would give canon a ring.

Oct 11, 2008 | Canon EF-S 17-85MM F/4-5.6 IS USM Lens

1 Answer

Canon ef 75-300 aperture fixed at f22


I disassembling my canon eos kiss body my self.

I used some pictures given by Google search. Did u try that??

Jul 31, 2008 | Canon 75-300mm f/4-5.6 III USM EF Lens

Not finding what you are looking for?
Canon EF 70-300mm f/4-5.6 IS USM Lens Logo

Related Topics:

16 people viewed this question

Ask a Question

Usually answered in minutes!

Top Canon Cameras Experts

kakima

Level 3 Expert

102366 Answers

TC CAMERA REPAIR.Com...

Level 2 Expert

168 Answers

old marine
old marine

Level 3 Expert

1923 Answers

Are you a Canon Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...