Question about Canon 28mm f/2.8 EF Autofocus Lens

1 Answer

Aperture not opening

Basically, the aperture in my 28mm is no longer opening. It was fine one minute and the next it just slowly got darker as the aperture closed like i have never seen before. I dont know if it is because i had my settings so high as i was shooting with strobes, or what. But this is my one of my favorite lenses and i can't stand to just let it go as it is still a nice piece of glass, the aperture is just not budging on manual or auto. There doesnt appear to be any obstruction between the connective plating on the lens or the camera.

HELP anyone!


Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 667 Answers

It is likely that your lens will need replacement parts. The drive motor and/or gearing that controls the aperture blades can fail.

Posted on Dec 27, 2007


1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Lens only shoots at 2.8

are you sure that the camera is in manual mode? It may be overriding your commands if it is set to auto or a particular priority setting. Apologies if my comments are irrelevant, I used 35mm slr cameras and have only a basic digital point and snap device but wondered if the same basic modes are still in use

Sep 22, 2015 | Cameras

1 Answer

I have a tamron 28-200mm lens that have a aperture ring at the back .. so is it possible to lock the aperture at f3.8 and shoot at 200mm focal ?? (this lens was f3.8- f5.6) by the way i was using a n

If you're using a Nikon camera, you want to lock the aperture ring at its smallest setting (largest f/number). You can control the aperture from the camera body, the same way as on a lens without an aperture ring.

This has nothing to do with the focal length. You can shoot at any focal length from 28mm to 200mm.

Feb 10, 2014 | Cameras

1 Answer

How can I use the aperture ring instead of set it to minimum in order to use the ring not the dial. I am trying to operate this way with an AF lens (not af-s) and my d5100.

Set the aperture ring to its minimum setting (largest f/number) and leave it there. You control the aperture from the camera body, exactly the same way as on a lens without an aperture ring. In the A mode, simply turn the command dial. In the M mode, hold down the aperture (exposure compensation) button and turn the command dial.

Apr 06, 2012 | Nikon Cameras

1 Answer

I bought an older 28mm nikon lens for my d60. when i try to rotate the apertrure ring, the d60 screen says that the aperture must be set to the highest setting. am i stuck with this aperture...

Set the aperture to its smallest opening (largest f/number) and lock it. You can control the aperture from the camera, the same way you do it on a lens without an aperture ring.

Apr 04, 2011 | Nikon N50 35mm SLR Camera

1 Answer

I seem to be unable to change the aperture, the marker points to A on the aperture scale , is this normal the ser no is :228700 Ken

Press down the small button to the right on the green A and twist the f stop ring. This button locks the lens on A

Jul 20, 2010 | Canon 28mm f/2.8 FD Lens

1 Answer

I have numerous Canon FD lenses that the Aperature does not work on. How do I go about repairing them. One is a FD 28mm 1:2.8 SC

You say the aperture doesn't work- is that on or off the camera? becasue of the unique design of the Canon "breach-lock" lens mount FD lens aperatures were locked open until they were mounted to a camera-

Mar 19, 2010 | Canon 28mm f/2.8 FD Lens

1 Answer

Dark, cloudy viewing 35-135mm Sigma lens

The problem sounds like the camera did not reset properly after the last exposure. Minolta deigned the camera to keep the aperture fully open except during exposure.
During exposure it snaps the aperture down to the selected opening, then opens it again to allow enough light for proper focusing. If it did not fully open the blades after the shot, much less light would pass through the lens. The viewfinder would be darker and look murky.
Most likely cause? Dried up lubricants in the camera.
Next likely cause? Teeth broken on a plastic gear.
Get it to a camera repair place. Get estimates first.

Dec 30, 2009 | Minolta Maxxum 7000 35mm SLR Camera

1 Answer

I take photos with the color pix s210 outside with natural light and the photos come out good, but when I am inside using artificial light the photos come out fuzzy. Is there a setting I can use to correct...

in darker settings your chip will imitate a slower film speed.  The aperture will remain open longer (than it would in bright light) to allow enough light in to the light sensitive chip.  Small movements of your subjects would show as fuzziness.  If you change your setting to sports or action setting the speed will be faster and there will be no blurring.  Then you will have a light issue so use a flash.

Nov 18, 2009 | Cameras

1 Answer

Minolta X-370N aperture very slow

Yes, it needs lubrication of Aperture Base.

Mar 30, 2009 | Minolta X-370S 35mm SLR Camera

1 Answer

Nikkor 105mm Ai-S micro lens aperture seems stuck

It does sound like your lens diaphragm/aperture ring coupling mechanism is in need of repair.

May 03, 2008 | Cameras

Not finding what you are looking for?
Canon 28mm f/2.8 EF Autofocus Lens Logo

Related Topics:

120 people viewed this question

Ask a Question

Usually answered in minutes!

Top Canon Cameras Experts


Level 2 Expert

176 Answers

old marine
old marine

Level 3 Expert

2188 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

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

Answer questions

Manuals & User Guides