Question about Canon 28-135mm f/3.5-5.6 EF IS USM AF Lens

1 Answer

My canon lens 28-135 produces focused pictures but looks fuzzy in the viewfinder...is there something that has to be cleaned?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Canon Expert
  • 454 Answers

If your camera has a viewfinder diopter adjustment (small wheel a the side of the viewfinder) try moving this up and down to see if that corrects the problem

Posted on Aug 06, 2014

5 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: lens canon 28-135 IS

This lens opens from the rear. The trim ring inside the mount must be removed and the electronic connector separated from the mount by removing the 2 small screws at the mount edge. You can then remove the mount itself. The electronics board is the next item to remove. Make careful notes on the connections as the can get reversed easily. Not sure how far you need to get into this piece, but this will get you inside.

Posted on Dec 23, 2007

Obertelli
  • 3006 Answers

SOURCE: side out of image

I'm assuming in what follows that you've tried other lenses and only get the problem with this one lens. If you haven't, then it's essential to do this first unless the lens is obviously the problem. If it happens with other lenses then you have a damaged image sensor mounting within the camera body which will need professional attention.

This is a common problem on this particular lens. Normally it's due to the front element of the lens being slightly skewed on the lens barrel and most commonly occurs after the lens has been dropped.

Turn your lens to manual focus and focus to the shortest distance. Set the lens upright on a table and carefully view all around, if the problem is the front element it will lean slightly to one side like a miniature leaning tower of Pisa. If it doesn't, then check again with greater precision using a ruler to measure the distance s between the lens barrel and the focussing ring and a number of opposite points around the circumference. If they're anything but identical then the lens is skewed. If they are identical then the skewed element is buried deep inside the lens and will need professional repair as it's most likely a fault with the moving element used for image stabilisation.

If the tests confirm that the front element is skewed then if you're really careful and lucky you can often jiggle the front element using a firm twisting action back into place. It does take a bit of judiciously applied brute force and if unsuccessful you can make the problem worse, but either way if you don't try then the lens needs professional repair and new internal parts.

I've had this problem on about one of these lenses every month or so for the last year. The brute force repair works in about half the lenses I try it on and normally lasts. On the others a strip down repair usually shows the same range of broken/worn parts as I find on those lenses which clearly are too far gone to attempt the brute force method.

The difference is cost: the brute force repair costs nothing. The proper repair is often economically unviable as it often costs 50% to 70% of the cost of a brand new lens with a warranty.

Posted on Sep 05, 2009

  • 1 Answer

SOURCE: Canon 50mm f1.4 lens focusing failure

http://www.fotomozaic.ro/artikel.php?idstory=225&s=1

Posted on Jul 13, 2010

Sylvesterix
  • 21 Answers

SOURCE: I have not banged or

Check this article which will lead you through how to identify and solve the problem.

http://www.richardsnotes.org/archives/2005/04/29/50mm-lens-contact-points/

Posted on Oct 16, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My camera won't focus!


While looking through the viewfinder, turn the diopter adjustment knob just above and right of the viewfinder to adjust it until the focus marks and other information in the viewfinder become sharp to your eye.

Aug 21, 2012 | Canon EOS 550D Rebel T2i Digital Camera

1 Answer

Hello my question is about what I think is a mirror issue on my n75 Nikon camera. When I look through the viewfinder the picture appears fuzzy. I looked closely at the lens and it does not look like it...


First off, with no lens attached, it will always be fuzzy, there is nothing to focus the light. Second, if you're looking at the mirror, you should be able to tell if it's dirty - if it is, glass cleaner and a soft rag are all that are required.

I'd suspect however that neither are your issue. Either your focusing screen is out of place or damaged, or your camera's diopter correction (if it has it) has been moved, Look for a small dial right next to your viewfinder with a +/- on it, and with the lens attached, and focused, turn the dial until everything is in focus. If your camera has this dial, it'll be usually on the right side of the viewfinder window.

If it does not have it you'll need to seek a repair shop to check your focusing screen since the mirror is 99% not going to be the cause of your problem. If there are no shops locally, google KEH Camera. It'll run you $35 for an estimate, waived if you decide to have any needed repairs done.

Sep 08, 2011 | Nikon N75 35mm SLR Camera

1 Answer

When I take a picture, the camera focuses just fine. But when I'm looking in the viewfinder it looks fuzzy, even if it comes out clear. What's wrong and how do I fix it?


There's a diopter adjustment knob just above and right of the viewfinder. Turn it while looking through the viewfinder until it comes into focus.

Dec 06, 2010 | Canon EOS Digital Rebel XS / 1000D IS...

1 Answer

Blinking circle when i try to take a picture


The camera is cannot confirm focus, so it locks up. Try changing the button on the lens to M. Manually focus the lens on something and take a picture. Move the button back to A (autofocus). It should work ok.
If not, try moving the switch back and forth several times to clean any corrosion.
Try another lens on it to determine if its the camera or the lens.

Lightspiritphotography.com

Nov 21, 2009 | Canon EOS Rebel GII with 35-80 lens 35mm...

1 Answer

Pictures fuzzy when you look through the viewer.


The viewfinder and the picture lens are totally separate. If it looks fuzzy, and then comes out fuzzy, the capture screen inside needs cleaned. The main lens and viewfinder lenses should be cleaned too.
Get estimates before you say yes to the work. It might be cheaper to buy another camera, unless you can do the work yourself.

Aug 06, 2009 | Sony Cyber-Shot DSC-P52 Digital Camera

1 Answer

Cleaned inside of viewfinder, now AF focus lights gone


Then you learn, when everything works fine, dont mess with it! Have a look at the gold pins that rely the body to the lens. Also check that your lens manual switch focus is engaged... Try a friend lens to see if its your cam or the lens...

Jul 29, 2009 | Canon EOS Digital Rebel XS / 1000D IS...

1 Answer

Canon Rbl XT out of focus in viewfndr when shutter half way down


Hello,
It's possible that the reason the "pictures turn out fairly good" is that your f-stop is set high enough that even though the image isn't properly focused, you have enough depth-of-field to bring your subject into "near focus". Does your lens try to focus back and forth when you half-press the shutter? If not, double check that the lens is in autofocus and not manual focus. You can also try cleaning the contacts between the lens and camera. Take the lens off, and then one-at-a-time clean the contacts on both the lens and the camera, using a clean pencil eraser. Gently rub the contacts. Be sure to hold the item upside down so that the eraser debris falls on to the table, not into the camera body or lens!

If none of this helps the autofocus may have become damaged and you need to have the lens and camera looked at by Canon Repair.

Jan 10, 2009 | Canon Digital Rebel XT / EOS 350D Digital...

2 Answers

Nikon D40 will not focus


on the right side of the view finder there is a little bar. Make sure it is all the way down. If it is in the up position then it will make the viewfinder, shouldn't make the images blurry though. Also make sure it is in AF not MF (auto focus and manual focus).

Oct 21, 2008 | Nikon D40 Digital Camera with G-II 18-55mm...

1 Answer

Diopter adjustment and viewfinder problem


Hi
I would not attempt to open the camera for any sort of fix. It has weather seals in place and would recommend sending it in to Canon. If you have any warranties left it would void these. Lastly this is a high proformance bit of kit and you want to get is seen to by an Authourised Canon Dealer.

As for the diopter adustment. To be able to see through the view finder and see your subject clearly, take of the lens cap aim the camera and turn the little dial until the screen inside the viewfinder is clear it should not be fuzzy. You are only looking at the screen/gring and not the image beyond. This does not affect your image but does effect how clearly you see your subject through the viewfinder.

Hope this helps

Regards

Jun 03, 2008 | Canon EOS-1Ds Mark II Digital Camera

2 Answers

Fuzzy photos


Turn the small dial to the right of your view finder either "+" or "-" until picture is clear inth eview finder

Jan 09, 2008 | Canon Digital Rebel / EOS-300D Digital...

Not finding what you are looking for?
Canon 28-135mm f/3.5-5.6 EF IS USM AF Lens Logo

Related Topics:

108 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

169 Answers

old marine
old marine

Level 3 Expert

1973 Answers

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

Answer questions

Manuals & User Guides

Loading...