topic Re: is my camera faulty in EOS DSLR & Mirrorless Cameras

is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 00:40:48 GMT

Just bought a second hand canon 1dIIn but its showing a strange patten has any one any thoughts is it faulty? thanks guys.

I also have a 7d and 600d never seen this happen before what lens it is a 300f4 prime with 1.4 ex. Any help thanks. 400iso shutter between 2500-4000 on a very sunny day no clouds.

Re: is my camera faulty

Waddizzle — Tue, 07 Jun 2016 01:00:33 GMT

Operator error Dump the 1.4 extender. It's ruining your exposure, and curtailing your dynamic range and contrast. Your shots need some post processing to compensate for the loss of light from the extender.

Remember, the camera is trying to expose everything as neutral gray. It's totally ignorant of color. Somethimes you need to over/under expose to get the exposure correct because the camera can, and will, over/under expose some shots to make everything middle gray.

Re: is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 02:17:36 GMT

sorry waddizzle you dont know what your on about. their is a patten in the image exposure has nothing to do with it. I also use a canon 7d dont get this issue at all. The patten appears in all the images in the same place. only on the 1d camera

Re: is my camera faulty

cicopo — Tue, 07 Jun 2016 03:22:52 GMT

You seem to have a lot of trouble with your gear which leads me to think operator eror too. Your settings don't make sense if it's bright & sunny. Were you using a lens hood? stray light may cause those patterns. Reflections could too. Post the full EXIF for those 3 photos, along with where the sun was in relation to the angle of your lens, hood or not, things which could cause reflections etc.

Re: is my camera faulty

cicopo — Tue, 07 Jun 2016 03:29:46 GMT

A few more questions. Is the sensor clean? You'll need a bright light & at least 4X magnifier to check. Is it a Canon TC or 3rd party? Do you have a filter on the lens? Troubleshooting is a lengthy process & there are a lot of variables.

Re: is my camera faulty

diverhank — Tue, 07 Jun 2016 05:39:49 GMT

First you need to try with different lenses and with and without the 1.4x to eliminate possibilities. If this happens with different lenses then it would suggest problem with either the shutter or the sensor.

I'd inspect the sensor to see if there are obvious scratches to dirt smudges but I think it might be the lens or lens mount problem...too hard to tell by just looking at the images.

By the way, did you purposely underexpose the pictures you posted? They are badly underexposed...if you didn't do it on purpose then the intensity on your monitor is too bright...you need to decrease it by maybe two or three stops.

Re: is my camera faulty

Peter — Tue, 07 Jun 2016 08:52:42 GMT

Exif data are already embedded.

The pattern seems to have the same movment as a canon shutter. Check yourself at youtube and canon shutter.

Re: is my camera faulty

Waddizzle — Tue, 07 Jun 2016 12:38:35 GMT

@paulbrogden10 wrote:
sorry waddizzle you dont know what your on about. their is a patten in the image exposure has nothing to do with it. I also use a canon 7d dont get this issue at all. The patten appears in all the images in the same place. only on the 1d camera

Yes, there is a pattern. Hopefully, it is just a dirty sensor. But, it looks a bit too "man made" to be random smears or dirt.

Re: is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 12:23:47 GMT

some one has suggested on another site i am on dpreview

(I wonder if the sensor has been damaged by improper cleaning... It is possible that the previous owner used an abrasive solution, judging by the long streaks. I don't see what it could be other than a sensor surface issue.)

Re: is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 12:23:59 GMT

Hello

Been testing the lens more and even when i take off a filter and clean the lens and teleconverter which is a canon one it still produces the same results I tried my 70-200 but could not tell. But as soon as i put my sigma 150-600 it produces the same results. I tried to see the sensor but can not tell. see example below 150-600mm around 357mm f8 iso 400

Re: is my camera faulty

Waddizzle — Tue, 07 Jun 2016 12:35:48 GMT

Why do you keep taking test shots with the teleconverter? Troubleshooting means eliminating possibilities, so get rid of the teleconverter. It is only adding questions, not resolving them. Get rid of any filters, too. Just lens and camera, that's all.

Re: is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 13:11:28 GMT

I have taken shots with out the teleconverter both on the 300mm f4 and never use a teleconverter on my 150-600 c why would you want to use a teleconverter on the 150-600mm any way?

When testing the 300mm on its own you can still make out the patten.

Just to make this plain and simple I tested my 70-200mm could not tell in that test but then tested 300 +1.4 and you can see the patten then tried the 300mm no filter and no extender on it the patten is their but is not very clear.

I tried my sigma 150-600mm at 357mm and the patten is really clear and does show up.

So all in all its not the lens or the teleconverter is it?

Re: is my camera faulty

Waddizzle — Tue, 07 Jun 2016 13:23:37 GMT

@paulbrogden10 wrote:
I have taken shots with out the teleconverter both on the 300mm f4 and never use a teleconverter on my 150-600 c why would you want to use a teleconverter on the 150-600mm any way?

When testing the 300mm on its own you can still make out the patten.

Just to make this plain and simple I tested my 70-200mm could not tell in that test but then tested 300 +1.4 and you can see the patten then tried the 300mm no filter and no extender on it the patten is their but is not very clear.
I tried my sigma 150-600mm at 357mm and the patten is really clear and does show up.
So all in all its not the lens or the teleconverter is it?

We can only form opinions based on the shots that you post, all of which seem to use a filter and the teleconverter. Sensor dirt should be pretty consistent, independent of the lens being used. You need to take test shots at similar f/stops with the different lenses, preferably something pretty narrow. Eliminate variables and unknowns.

Personally, I strongly suspect that there is an image sensor related issue with the camera. Stop confirming what you already seem to know. It is not going away. Get a refund, if you can.

Re: is my camera faulty

Peter — Tue, 07 Jun 2016 13:39:39 GMT

To me it seems more like a shutter issue. What else would give the perfect shape of a half bow, and at the same place where the shutter curtain is hold together?

If it is that, then a different shutter speed would make it worse or better. For example a long shutter speed, 30 seconds, would make it less and a short would make it to appear more.

Re: is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 13:46:01 GMT

peter that could explain why when I tried a test shot in my home studio at 160th of a second at 2.8 70-200 i could not see this effect.

Re: is my camera faulty

Peter — Tue, 07 Jun 2016 13:48:59 GMT

That could also be because of f/2.8.

Re: is my camera faulty

ebiggs1 — Tue, 07 Jun 2016 14:38:30 GMT

Paul,

I am with Peter on this. I doubt it is the sensor. You can't get at the actual sensor in cleaning anyway. I would try to determine if it is the shutter or your lenses.

The 1D Mk IIn is a great camera. I still own one and use it on occasion. CPS (Canon) will not service them any longer so if it needs a shutter, or any thing else, you will have to find a private shop. Problem is they aren't worth much so reapiring is not a first option.

You need to clear all settings. You can't clear personal settings unless you have a firewire set up. That's a bad thing. There may be a setting that is wrong. Your shots look way under exposed so I think a setting may be wrong at any rate.

I used my 1Dn just yesterday. The old Siggy 150-500 lives on it.

Re: is my camera faulty

RobertTheFat — Tue, 07 Jun 2016 15:29:33 GMT

@Peter wrote:
To me it seems more like a shutter issue. What else would give the perfect shape of a half bow, and at the same place where the shutter curtain is hold together?

If it is that, then a different shutter speed would make it worse or better. For example a long shutter speed, 30 seconds, would make it less and a short would make it to appear more.

So the theory, then, is that it's a shutter-related light leak?

Re: is my camera faulty

Peter — Tue, 07 Jun 2016 16:45:03 GMT

@RobertTheFat wrote:
@Peter wrote:
To me it seems more like a shutter issue. What else would give the perfect shape of a half bow, and at the same place where the shutter curtain is hold together?

If it is that, then a different shutter speed would make it worse or better. For example a long shutter speed, 30 seconds, would make it less and a short would make it to appear more.
So the theory, then, is that it's a shutter-related light leak?

If the 1DIIn has the shutter curtains placed from the right, if you are standing behind the camera, my theory is that something is leaking light, for example the metal pin holding a shutter blade. Of course just a theory. I have never seen this kind of issue before with that perfect half bow.

Re: is my camera faulty

paulbrogden10 — Tue, 07 Jun 2016 16:58:09 GMT

Thanks guys as always you helped me out I have used my 70-200 mk1 and took various pictures at different apertures and shutter speeds. below 1000s you can not see any thing or not much at 250s its almost impossible to see.

Yes the pictures were under exposed by half a stop forgive me for that as it is a very different camera to the 7d and 600d. As soon as I go up from 1000s-8000s it gets worse. Clearly its not a sensor issue. So its the shutter I new you guys would know what it was so much for a lens or extender issue hay. cheers guys. Looks like its going back to the seller on ebay he ant going to be happy.