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Magenta blowout in phtos
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Sep 16, 2014 09:26:45   #
James R. Kyle Loc: Saint Louis, Missouri (A Suburb of Ferguson)
 
Gene51 wrote:
The camera needs a new sensor - overexposed highlights are white, not magenta, and the images are otherwise properly exposed with ok color and white balance. A trip to Canon is in order.

+++++++++++++++++++++++++++++++++

I am in agreement with Gene.

There IS a problem with the sensor.

It may be just best to trade that one in at a local camera store and get something for a new or used camera then sending it off to Canon. The sending it off and getting it back alone will be about 100 bucks... Then there is the repair fee. ?? And I would not know about that..

Good luck on this ... Please send a post as to your outcome.

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Sep 16, 2014 09:27:28   #
IchthysPhoto Loc: Reston, VA
 
Searcher wrote:
I have run a few "tests" on these images and I think the magenta areas are all blown highlights (as suggested by Rook. I used the removal tools to eliminate the magenta to see what was underneath, and in every case the underlying area was over exposed. There are very few signs of CA in other parts of the images.

When you get the camera I would suggest a reset, remove any filters from the lens, then few shots in a shady area. Do not use any scene modes, use base ISO, auto WB or cloudy. Follow that with bright area, and if possible with a change of lens.

Compare those shots with deliberate over exposure shots.

If the magenta recurs, then possibly either the sensor or the processor is on the blink.

Also check the lens mount - unlikely but any looseness?
I have run a few "tests" on these images... (show quote)


Many thanks all who have contributed your inputs. @Searcher and @ Rook2C4 your inputs are most appreciative. While I have not been able to get the "physical camera" as yet from her, I was able to open the RAW Data from one of the images in Photoshop. IMG_6318.jpg (Woman with Rebel shirt) - re-uploaded with "StoreOriginal" flag selected.
I am no expert by any means and only just barely understand what I am looking at; however judging by what I see and her comments of using "AUTO" mode, my guess is it may be as you say, an issue with the sensor. If one of you finds something else that I am not seeing, many thanks in advance for your pointing it out (so that I too may learn).
If indeed it is a "sensor" issue, do you guys recommend a "fix" or would she be better off with replacement (in your humble opinions of course).
Again many thanks to all!! and many blessings. While not an active "commentator" on the forums until just now, I have enjoyed the many threads and comments I have read over the past year or so since finding the site. ~erik


(Download)

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Sep 16, 2014 09:32:11   #
redhogbill Loc: antelope, calif
 
jerryc41 wrote:
Strange, but I get the same thing on my plasma TV occasionally. Probably for a different reason.

ME TO, just started a few days ago!! after an hour it goes away!!! time for a 70", bad eye site!

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Sep 16, 2014 09:40:51   #
jerryc41 Loc: Catskill Mts of NY
 
redhogbill wrote:
ME TO, just started a few days ago!! after an hour it goes away!!! time for a 70", bad eye site!

I realized there is a big problem with these big TVs. How do you get rid of a broken one? This thing weighs 100 pounds. Best Buy accepts electronics for recycling - for free - but getting it there could be a challenge.

The magenta on my TV would come and go with no pattern. I've swapped TVs with the one in the living room.

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Sep 16, 2014 09:47:27   #
redhogbill Loc: antelope, calif
 
jerryc41 wrote:
I realized there is a big problem with these big TVs. How do you get rid of a broken one? This thing weighs 100 pounds. Best Buy accepts electronics for recycling - for free - but getting it there could be a challenge.

The magenta on my TV would come and go with no pattern. I've swapped TVs with the one in the living room.

I will hire a young gun in the neighborhood to help me load it, $20.oo buys a lot of young" strong back" help!!
I bought a 50" LED tv for my living room last year, I can pick the hole thing up by myself!! plus I think it is a better picture

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Sep 16, 2014 10:05:31   #
boberic Loc: Quiet Corner, Connecticut. Ex long Islander
 
jerryc41 wrote:
I realized there is a big problem with these big TVs. How do you get rid of a broken one? This thing weighs 100 pounds. Best Buy accepts electronics for recycling - for free - but getting it there could be a challenge.

The magenta on my TV would come and go with no pattern. I've swapped TVs with the one in the living room.


The problem with the TV may be a simple fix. The color balance or tint maybe set for too much red. Check out the menu and then picture then tint or color and adjust the "slide" just may fix the color shift.

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Sep 16, 2014 11:36:38   #
jerryc41 Loc: Catskill Mts of NY
 
boberic wrote:
The problem with the TV may be a simple fix. The color balance or tint maybe set for too much red. Check out the menu and then picture then tint or color and adjust the "slide" just may fix the color shift.

I considered that, but when it's right, it's perfect. Then it will pop into the gaudy red colors, sometimes really bad. With any luck, it will pop back to normal, but sometimes it can last for hours.

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Sep 16, 2014 12:27:11   #
davidcaley Loc: Utah
 
Canon Rebel T4i has been recalled but not taken off shelves in stores. Reference Consumer Reports Oct 2014 p 14. Perhaps this camera fits under that recall.

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Sep 16, 2014 12:57:22   #
jeep_daddy Loc: Prescott AZ
 
IchthysPhoto wrote:
A friend of mine has a Cannon Rebel XTI and recently started getting these weird magenta blowouts in her images. Has anyone ever experienced this or know what causes it?


Have your friend do a reset of the camera, put it in "auto" mode and then take a few shots. If it still does it, then it's time for a new camera. If she sends it to Canon for repair, they will most likely tell her that it can't be repaired, but they usually offer a trade of her broken camera and some money to replace it with a refurb or newer model of camera body. I've heard that the deals can be quite good.

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Sep 16, 2014 15:01:36   #
James R. Kyle Loc: Saint Louis, Missouri (A Suburb of Ferguson)
 
jeep_daddy wrote:
Have your friend do a reset of the camera, put it in "auto" mode and then take a few shots. If it still does it, then it's time for a new camera. If she sends it to Canon for repair, they will most likely tell her that it can't be repaired, but they usually offer a trade of her broken camera and some money to replace it with a refurb or newer model of camera body. I've heard that the deals can be quite good.

-------------------------------------

WoW!!

That's GOOD News....

I am keeping that in mind ... Well, what is left of my mind that is ;-)

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Sep 16, 2014 15:58:32   #
dpullum Loc: Tampa Florida
 
Well, when in doubt reboot. To simply reboot a camera, take the battery out for 24 hours.

If that does not work then reload the firm ware even if it is the same number. May not be possible.

Is this color problem there when previewing the photos in your camera?

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Sep 16, 2014 16:40:19   #
OddJobber Loc: Portland, OR
 
davidcaley wrote:
Canon Rebel T4i has been recalled but not taken off shelves in stores. Reference Consumer Reports Oct 2014 p 14. Perhaps this camera fits under that recall.


And perhaps since the D600 had shutter problems, Nikon will clean my D7100 sensor for free?

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