cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Camera problems

Barry65
Contributor

I have had problems with 70D and 90D. A black streak goes across the image making the camera unusable. What am I doing wrong?

16 REPLIES 16

I suspect you have an intermittent problem with a sticking  aperture blade. 

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

With having 3 Canon cameras have a similar problem, I am just trying to see if I'm doing something wrong.

With lens off camera look through rear element. Do you see anything other than a clear view through?

 

Set the Av to f/8. 

Look through the lens and cycle the DoF button. See anything amiss?

 

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

As another test, if you use your lens at the widest aperture (f/2.8) on all three cameras, does the problem still exist?  If not, it's then highly likely it's indeed an aperture blade in the lens that is failing.

 

Also agree that the likelihood of three cameras all having failing shutters is extremely low.

--
Ricky

EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L, 600EX-RT (x6), ST-E3-RT
EOS C70, RF 24-70 f/2.8L IS, EF-EOS R 0.71x

Using my Sigma 17-50 mm lens, I still have a problem with a horizontal white bar and a diagonal black bar at right.

I no longer have the two earlier 70D cameras that had problems. The 90D started having problems last night. I have a used 70D backup which is working fine right now. I just want to figure out if I'm doing something to cause this.

While it is unlikely that three cameras have failed shutters, the additional info seems important.

 

Now it seems you are saying that one camera has a problem and one doesn't. And it happens with two different lenses.

 

That would seem to be a camera problem.

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic
Announcements
11/22/2022: New firmware available for EOS R3, EOS R7 and EOS R10
11/16/2022: We're thrilled to be ranked among the Best Employers for Veterans in 2022 by Forbes.
10/14/2022: Help ensure your autofocus is properly aligned with a Canon Precision Alignment
09/19/2022: New firmware version 1.0.4.1 is available for EOS C70
08/31/2022: New firmware version 1.1.1 is available for RF 70-200mm L IS USM
08/09/2022: New firmware version 1.2.0 is available for CR-N 300
08/09/2022: New firmware version 1.2.0 is available for CR-N 500
07/28/2022: New firmware version 1.2.1 is available for EOS-R3
07/21/2022: New firmware version 1.6.0 is available for EOS-R5
07/21/2022: New firmware version 1.6.0 is available for EOS-R6
07/21/2022: New firmware version 1.1.0 is available for EOS-R7
07/21/2022: New firmware version 1.1.0 is available for EOS-R10
07/14/2022: New firmware version 1.0.1 is available for CR-X300
07/01/2022: New firmware version 1.3.0 is available for PowerShot PICK
06/10/2022: Service Notice:UPDATE: Canon Inkjet Printer continuous reboot loop or powering down
06/07/2022: New firmware version 1.3.2 is available for PowerShot G7 X Mark III
06/07/2022: New firmware version 1.0.3 is available for EOS M50 Mark II
05/31/2022: Did someone SAY Badges?
05/26/2022: New firmware version 1.0.5.1 is available for EOS-C500 Mark II
05/26/2022: New firmware version 1.0.3.1 is available for EOS-C300 Mark III
05/10/2022: Keep your Canon gear in optimal condition with a Canon Maintenance Service
05/05/2022: We are excited to announce that we have refreshed the ranking scale within the community!
04/26/2022: New firmware version 1.0.1.1 is available for EOS R5 C
03/23/2022: New firmware version 1.0.3.1 is available for EOS-C70
02/09/2022: Share Your Photos is back!
02/07/2022: New firmware version 1.6.1 is available for EOS-1DX Mark III
01/19/2022: READY FOR ANYTHING EOS-R5 C
01/13/2022: Community Update. We will be retiring the legacy profile avatars on 01/20/2022. Click this link to read more.
01/05/2022: Welcome to CES 2022!