November 26, 2014, 08:09:31 AM

Author Topic: How can it be?  (Read 1478 times)

Anthonyhnj

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How can it be?
« on: December 13, 2013, 05:20:36 PM »
Hi, just purchased a new canon 70d body.  after the first few shots I noticed a dark spot in the upper portion each photo.  OK, dust on the sensor, maybe when putting on the lens, i get it.  I have had my share of dslr's over the years, so i know what sensor dust is.  Just take my rocket blower and all gone, never a issue.

So after noticing the the dark spot, i took out the blower, blasted a few times, reattached the lens and shot.  Guess what, dark spot still there.  I put the camera in manual cleaning mode, mirror lifted and the exposed sensor shows no dust that can be seen with the naked eye. 

My question is, could it be something other than dust causing the dark spot, it only shows up against the blue sky, which i shoot a lot of landscapes.  Should i return the camera in exchange for a new one.

Your thoughts?

Best,
Anthony :)

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How can it be?
« on: December 13, 2013, 05:20:36 PM »

Drizzt321

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Re: How can it be?
« Reply #1 on: December 13, 2013, 05:23:51 PM »
Hi, just purchased a new canon 70d body.  after the first few shots I noticed a dark spot in the upper portion each photo.  OK, dust on the sensor, maybe when putting on the lens, i get it.  I have had my share of dslr's over the years, so i know what sensor dust is.  Just take my rocket blower and all gone, never a issue.

So after noticing the the dark spot, i took out the blower, blasted a few times, reattached the lens and shot.  Guess what, dark spot still there.  I put the camera in manual cleaning mode, mirror lifted and the exposed sensor shows no dust that can be seen with the naked eye. 

My question is, could it be something other than dust causing the dark spot, it only shows up against the blue sky, which i shoot a lot of landscapes.  Should i return the camera in exchange for a new one.

Your thoughts?

Best,
Anthony :)

Have you checked the lens? Or is it a lens you've used before and should be good? Have you used the mirror lockup function and taken a look at the sensor itself?

I'd probably just return it, or if you bought it from a local camera store bring it in to them and show them what you're seeing and get them to figure it out.
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neuroanatomist

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Re: How can it be?
« Reply #2 on: December 13, 2013, 06:07:01 PM »
If it's not dust, it could be oil.
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Anthonyhnj

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Re: How can it be?
« Reply #3 on: December 13, 2013, 06:14:30 PM »
I have tried different lenses and all produce the same result. I have locked up the mirror and the sensor looks clean to the naked eye. Shined a light on it and can't  see anything that would make the spot show up.

If the spot was in the upper part of the photo is it at the top or bottom of the sensor.

2n10

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Re: How can it be?
« Reply #4 on: December 13, 2013, 08:36:09 PM »
It will be at the bottom in the opposite side from what you see in the picture if I remember right.
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distant.star

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Re: How can it be?
« Reply #5 on: December 13, 2013, 08:45:24 PM »
  I put the camera in manual cleaning mode, mirror lifted and the exposed sensor shows no dust that can be seen with the naked eye. 

Have you used the mirror lockup function and taken a look at the sensor itself?

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dak723

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Re: How can it be?
« Reply #6 on: December 13, 2013, 08:52:00 PM »
Really no reason to test it any further - or to try and diagnose it.  It costs a lot of money, so if you're not satisfied (and you shouldn't be) you should exchange it.  Hopefully you got it somewhere where exchanges are easy.  It took me 3 tries to get a 6D that exposed properly!

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Re: How can it be?
« Reply #6 on: December 13, 2013, 08:52:00 PM »

rpt

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Re: How can it be?
« Reply #7 on: December 13, 2013, 08:54:57 PM »
Really no reason to test it any further - or to try and diagnose it.  It costs a lot of money, so if you're not satisfied (and you shouldn't be) you should exchange it.  Hopefully you got it somewhere where exchanges are easy.  It took me 3 tries to get a 6D that exposed properly!
+1
I vote that you exchange it.

Anthonyhnj

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Re: How can it be?
« Reply #8 on: December 15, 2013, 05:54:22 PM »
Really no reason to test it any further - or to try and diagnose it.  It costs a lot of money, so if you're not satisfied (and you shouldn't be) you should exchange it.  Hopefully you got it somewhere where exchanges are easy.  It took me 3 tries to get a 6D that exposed properly!

I exchanged it today for a new one.

Thanks

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Re: How can it be?
« Reply #9 on: December 15, 2013, 06:35:14 PM »
It took me 3 tries to get a 6D that exposed properly!

What was wrong with your 6d - was the exposure completely broken, or were the problems more subtle?

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Re: How can it be?
« Reply #9 on: December 15, 2013, 06:35:14 PM »