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Canon 100-400 IS lens

I have a 4 months old canon lens as above. I have spots on the inside of both ends of the lens. No doubt caused by Induan humidity.

What's the solution?

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Early Solution is: Contact this man
Sanjay Sharma SHYAMJI CAMERA REPAIRS 17, Dev Amba Market, Station Road Ajmer- 305001 (Rajasthan) Ph 0145-2427618 9928035836 He's great. Very skilful, and helpful and good on spares.

Posted on Feb 20, 2008

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There is a dark spot that is showing up on all my pictures and it's getting larger


To make sure this spot is where I think it is, on the sensor, You should put the camera in manual, A priority and whose the highest value. Shoot in bright light a complete white paper.
Then evaluate the picture on the monitor. If the spot is clearly viable the spot is on the sensor. With a fixed lens on your powershot, you can't repair or correct yourself. You should contact Canon. Don't tell Canon, you were in a moist environment. Perhaps a mould is growing on the sensor.

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If by saying the upper right corner of the lens you really mean that there is a dark spot on each image AND the rear display, there may be dirt or dust on the lens itself. Clean the lens with an optical quality cleaner. Do not use paper towels and Windex or the like - as paper towels can scratch the lens.

It is also possible that the dark spot is a "stuck pixel" on the image sensor inside the camera. There is no way to repair a stuck pixel outside of replacing the sensor. Any dark spot (regardless of source) can be edited out by using image editing software. This will allow you to to make the dark spot less noticeable - or practically invisible.

If the dark spot is on the rear display only, it can also be a result of a "stuck pixel" on the display itself. This should not show up an images, but only on the display. There is little that can be done outside of replacing the entire rear screen.

There are other things that can cause these problems, but those listed above are the most common.

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Go with this place: www.camerasandparts.com They are about half of what Canon charges and they do awesome work on the Canon Powershots. All they specialize in are the Canons, they do really great work and they are so much less than Canon on the service.

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CAMERA IS THREE MONTHS OLD. ON MY LAST OUTING I NOTICED A PERFECT CIRCLE SPOT ONLY IN SHOTS OF THE SKY. THE SPOT IS IN THE IDENTICAL PLACE ON ALL SKY SHOT PHOTOS NO MATTER WHAT FOCAL LENGHT IS USED. THE...


If you have another lens, switch it and take some shots of the sky. If the spot is gone, it probably was the lens that needs cleaning/servicing. However, it's more likely that there's dirt on your CCD. On your camera's menu, select mirror lockup/clean CCD (I can't remember the exact terminology but you get the idea).

After you select that, the mirror will stay up. Remove the lens and you'll see that the CCD is now exposed. Use a blower (don't use your mouth to blow as you will end up with spit in the camera) to clear out any dust/debris on the CCD. Don't touch the CCD.

Turn off the camera and you'll hear the mirror go back down. Re-attach your lens and try some shots.

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Since the problem is limited to this lens, I highly doubt that you would have to replace the cameras AF sensors.
Since you only have the problem with this lens, I am afraid that you will have to get the lens repaired. Is the lens also 3 years old? Did you get it with MACK extended warranty?
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This is what the people at the canon tech support say to do for error 99



read this!! :)

The guy at tech support listened and then told me that the lens contacts were dirty and to get a pencil with an eraser on the end, just a regular old pencil with a red rubber eraser. Detach the lens from the camera, hold it so that the lens’ gold contacts are pointing down and lightly erase their exposed surface, cleaning them of any hand oil that might have gotten on them.

Do the same thing with the gold contacts inside the camera body. This is a bit harder but it’s doable: just hold camera so lens opening points down so no gunk falls in. Erase lightly. I used a lens cloth and dabbed at the contacts rather than blow them so as not to blow the erasings inside the camera.

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hope this works for you!!!! have a nice day!! :) :)

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