I bought my 40D about a month ago from a respectable store in Chicago. Just yesterday I realized that as each photo is taken, a tiny bright red dot is recorded in the exact same spot every time. I use aperture and have checked all of the photos, and now that I know to look, I see that bright red dot as I zoom in. I can also see it on the camera LCD just after taking a picture so I know it is not an import issue. I have tried this with both both the raw (which I generally stick to) and jpeg formats.help!i am planning on taking the camera back to the store of purchase tomorrow to see what they can do. i'll take my laptop along as well to show them the photos in aperture.what could cause this? image sensor? memory card? i am already dreading the possibility of being without my camera if I need to have it shipped out to canon for repair/replacement.thanks, devon

Put on lens cap and do a sensor clean for about 30 seconds. Might map out a hot pixel or two.

It sounds more like a bad pixel than dust. Dust usually causes a darker spot against a white background. I would return the camera and get another one. -- Alex ==================================== Canon 40D, EF 70-300 IS USM, 17-85IS, 28-135IS, 580EXII,

I tried to sensor clean - didn't work.I'll take it back to the store tomorrow but I just read on their website that they accept returns up to 14 days from purchase. I've had the camera for about a month and just noticed the issue now. Any advice on how to approach the store about it? I have everything that came with the camera and the receipt.thanks, devon

I would be taking the camera back, but I've been declared a "NUTJOB" so take it with a grain of salt!You may end up sending it back to Canon for warranty repair if the store enforces the 14 day rule.

This has worked for me:Leaving your lens cap on, put the camera into sensor cleaning mode (not the auto cleaning, but the manual cleaning that flips up the mirror) for at least 10 seconds. The turn the camera off and back on. Then see if it's still there.

I don't understand how this would actually fix a sensor pixel(s) issue. All you're doing in the manual cleaning mode is locking up the mirror and opening the shutter. This is done with the lens removed to allow using air or swabs to physically clean the sensor. The mechanism that shakes the sensor is not activated during the manual mode, or is it?Has this really healed hot pixels for anyone?snappeywrote:This has worked for me:Leaving your lens cap on, put the camera into sensor cleaning mode (not the auto cleaning, but the manual cleaning that flips up the mirror) for at least 10 seconds. The turn the camera off and back on. Then see if it's still there.

MisterPootieCatwrote:Has this really healed hot pixels for anyone?There are a ton of posts it has. >

I see a lot of posts where people say it did only to say that it didn't. I still don't understand how this would heal a sensor. I'll have to try it someday. Right now my camera has one hot pixel but only shows up in exposures of 15 seconds or longer.Borrisswrote:MisterPootieCatwrote:Has this really healed hot pixels for anyone?There are a ton of posts it has. >

...wtf?okay...i too have no idea how locking up the mirror temporarily is supposed to heal dead/hot pixels but...it worked oddly enough. I chose "clean manually" which locks up the mirror for manual cleaning, switched the camera off and then on again, took another picture and problem solved. no more hot red spot in the same location. what a relief but really, what is the real deal here? it took me a month to notice that all of my pictures were coming out slightly disfigured, is there anyway to truly solve this?thanks for all of your help, devon