topic Re: Camera problems in EOS DSLR & Mirrorless Cameras

Camera problems

Barry65 — Wed, 15 Sep 2021 15:24:42 GMT

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

Re: Camera problems

kvbarkley — Wed, 15 Sep 2021 16:10:31 GMT

Post a picture, but it appears you have a broken shutter.

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 16:14:43 GMT

Re: Camera problems

MikeSowsun — Wed, 15 Sep 2021 16:41:39 GMT

That does look like a failing shutter. Are you saying that both your 70D and 90D have the same problem?

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 16:44:14 GMT

I have had 2 70D cameras and one 90D camera with the same problem. Just trying to see if I'm doing something wrong. the problem has happened while I was using a Canon 70-200m lens.

Re: Camera problems

MikeSowsun — Wed, 15 Sep 2021 16:50:32 GMT

It seems highly unlikely that all 3 of your cameras have a failing shutter.

I would suspect a lens problem in your case. You may have an aperture blade failing on the lens. Does the problem only happen with that one lens?

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 16:55:39 GMT

The lens has worked fine on other cameras. Can the lens cause a problem with the camera?

Re: Camera problems

jrhoffman75 — Wed, 15 Sep 2021 17:27:48 GMT

@Barry65 wrote:
The lens has worked fine on other cameras. Can the lens cause a problem with the camera?

Worked fine on other cameras at the same time as the three cameras you mentioned have a problem, or worked fine at other times?

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 17:33:57 GMT

I have used the Canon 70-200 lens for 5 and a half years on three different Canon cameras: 2 70 D's and one 90D. My problems with all three cameras happened when I was using that lens. In other words, after I couldn't use one Canon camera anymore, I used the lens on the next Canon I bought and it worked until the same problem happened. And then again with the 90D which failed last night.

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 17:36:00 GMT

I have a remaining 70D and the 70-200 lens is working on that camera. Could the lens cause damage to the camera?

Re: Camera problems

jrhoffman75 — Wed, 15 Sep 2021 17:39:13 GMT

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

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 17:41:44 GMT

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

Re: Camera problems

jrhoffman75 — Wed, 15 Sep 2021 17:51:07 GMT

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?

Re: Camera problems

rs-eos — Wed, 15 Sep 2021 18:07:31 GMT

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.

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 18:39:48 GMT

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

Re: Camera problems

Barry65 — Wed, 15 Sep 2021 18:41:40 GMT

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.

Re: Camera problems

jrhoffman75 — Wed, 15 Sep 2021 19:04:52 GMT

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.