Question about Sigma HF 28-80mm f/3.5-5.6 Aspherical Macro Lens for Canon AF

1 Answer

Sometimes my viewfinder goes dark and the lens' autofocus stops working. What does this mean, and how should I fix it?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 170 Answers

In all probabilities, the mirror lock-up feature of the camera is on. When the mirror is locked in the upright position, the optical viewfinder will go blank. This will also prevent the AF from working. If the mirror lock-up feature is not on, then the camera's mirror box could have been damaged. If this is the case, then the camera would require a minor repair (alignment of mirror) by a service center.

Posted on May 13, 2010

Ad

1 Suggested Answer

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 repair professionals here in the US.
click here to Talk to an Expert (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Autofocus canon 600d


There is a seperate sensor for the autofocus. IT is either bad or dirty. You may not be able to clean it either.

Jul 18, 2012 | Canon EOS 600D Rebel T3i Digital Camera

2 Answers

Nikon D60 does not work in autofocus


Do you have access to another camera? If you do, try the lens on that camera. If you get the same results, it's the lens. If no, then it's the camera body. Once you isolate the problem you'll know if you need to get the lens fixed or if you need to get the camera fixed.

Sep 08, 2017 | Nikon Normal AF Nikkor 50mm f/1.8D...

1 Answer

The image looks dark


The finished image looks dark or it looks dark in the viewfinder?
If your question is "the image looks dark" in the viewfinder my answer is it's an F4.5 lens so letting less light into the viewfinder and it will look dark. The big difference will be seen if you are coming from lets say a Nikon 50mm F1.8 which is two stops faster then your F4.5.
If it's the finished picture after you taken it I'd say you underexposed the shot.

Dec 10, 2010 | Nikon Nikkor 55-200mm f/4.5-5.6 G AF-S...

1 Answer

When I look through the viewfinder, everything is very dark, I can barely see what I am trying to focus on. The auto focus does function but it is hard to determine what I am looking at. I can take a...


Sounds to me like the aperture diaphragm on the lens is stuck in a small opening position. If you detach the lens from the camera and look through it, is the whole opening light or just a small dot in the middle? The diaphragm can stick if it gets a drop of oil on it.

Nov 19, 2010 | Tamron 28-200mm f/3.8-5.6 LD Aspherical IF...

1 Answer

Canon, wont focus, dark viewfinder


try cleaning the contacts on the bottom of the lens, where it mounts to the camera body. This is a simple step to take and one that I try to remember to do frequently when I am switching back and forth between lenses frequently. get a magnifing glass and look closely at the contacts on both the lens and body. I have 5 canon bodies and the 75-300 IS lens is one of my favorites. It is ALWAYS mounted on either an XTI or XSI and within arms reach at all times. I have a hook and hang it from the headrest of the passenger seat when driving so that it is always ready at a moments notice. I have never had a problem with that lens.

Jan 24, 2010 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

I recently purchased the D80 and had no problems, it worked great and took magnificant shots. However, the other day I turned it on and the viewfinder was now, dark and out of focus. The battery was fully...


Check the mirror. The image you see in the viewfinder comes through the lens, and is reflected by the mirror. If it's dirty, it will affect the image you see. When you take the picture, the mirror lifts up, the viewfinder image is interrupted, and the light from the lens goes to the image sensor. So...if the mirror is dirty, the picture will be fine but the viewfinder image will be dark or out of focus.

Jan 23, 2010 | Nikon D80 Digital Camera with 18-135mm...

2 Answers

Autofocus has failed on the CAnon EOS 40D. I can power the camera up with lens in manual but as soon as I go to autofocus it becomes unresponsive. The viewfinder goes black. Swapped batteries and lenses....


It's not the Autofocus, there's no 'non-engineer' fix. Lens and slider have failed, it's basically broken inside and I suspect it was the original fault. It's about £160-200 outside of warranty to fix via a canon authorised repair agent such as www.camera-repair.co.uk in Colchester. Send it back, get your money back.

Jun 30, 2009 | Canon EOS 40D Digital Camera

1 Answer

Sigma 28-300mm autofocus problem


You will need the interupter replaced the iris is closed down so the a/f will not lock on

Jun 16, 2009 | Sigma AF 70-300mm f/4.0-5.6 DL Macro Super...

1 Answer

In the dark


Hey yorkshireboy,
If the viewfinder is dark the only cause of this could be the aperture is stopped down to a smaller opening, which is probably an indication that your lens is not working properly. One way to tell for sure is to bring the camera to a retail location and try out a brand new lens on it, and if the problem persists then your lens is probably fine and the problem is in the camera body. On the front of this camera is a button that stops the aperture on the lens down so the photographer can preview the depth of field, and if this function is broken somehow it might be stopping the aperture down at all times which might be causing your problem. Either way this is a nice camera and I would have the camera or the lens (whichever ends up being the culprit) looked at by an authorized service technician. If the problem is the lens and the lens is a Nikon lens it most likely has a 5 year manufacturer warranty on it and the repair would probably be free of charge. I hope this helps!

Sincerely,
Allan
Go Ahead. Use Us.

Jun 12, 2008 | Nikon D70s Digital Camera

1 Answer

Really Dark Viewfinder


That would explain the darkness if the lens is stopped down. It would seem the aperture control is faulty on the camera body. Normally, the aperture remains open until you take the picture. It is only closed down while the shutter is open.

Feb 11, 2008 | Nikon D50 Digital Camera with 18-55mm Lens

Not finding what you are looking for?
Sigma HF 28-80mm f/3.5-5.6 Aspherical Macro Lens for Canon AF Logo

Related Topics:

165 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sigma Cameras Experts

kakima

Level 3 Expert

102366 Answers

M_Butkus

Level 2 Expert

120 Answers

Steve

Level 3 Expert

3289 Answers

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

Answer questions

Manuals & User Guides

Loading...