Is this sensor dust?

well i've never seen dust this big... and when i looked at the sensor its reflect like a smudge on the lens

if is a dust, and its that big it would have been easily blown away with a rocket blower. i tried blowing it for 5 minutes and no luck... should i try to clean it with SensorKlear or send it back to canon? anybody have dust this big before?

thanks in advance

HTTP response: NOT FOUND | MIME changed to 'text/html'

never seen althing that big......can you see it with mirror lock.?

might be the loch ness mostor

I check sensor dust with Notepad maximized on my computer.
Open notepad and maximize it so you have a big blank white monitor.
Set your camera to f16, shutter speed to about 1sec and manual focus.
De-focus the camera and take a picture of the blank white monitor while panning around the white monitor. Have a look at the photo and it will reveal any dust spots present.

Maybe it's the start of a black hole caused by the Hadron collider

Some stuff just doesn't blow off and has to be wet cleaned.

Set your camera to manual sensor clean, then take a small flashlight and shine it on the sensor. If there is a dust bunny that big in there you should be able to see it even without magnification.

If it is stuck on there than bad then as mentioned wet cleaning would be a good option. A Sensor Klear pen would probably clean that off too. This is just part of the fun of digital, sensors need to be cleaned periodically.

It`s dust.

I had a few spots like that, although not as big the last few weeks... Checked the dust issue at f32 shot at the sky, along with f22 and f11... I must of had 20-30 dust speckles, although I may of only saw one, maybe two on certain shots. I went and bought the Copper Hill cleaning kit, which had the wet cleaning kit, the blower, and sensor sweep for like $50. I did the wet cleaning and blew it with the air afterwards. I now maybe see 3-4 speckles (more stubborn dust) which will probably come off in the future. But it removed roughly 75% of the dust I did see.

Great kit... Plus, they even threw in a rainbow slinky and M&M's in my order

That is not a big piece of sensor dust. I've had bigger. It is sensor dust though. The longer you go between wet cleans, the more crud residue you get sticking to the sensor filter. It's in the air, all the time, everywhere. Humidity, oils, sneezer snot floating around in the air, it might have even come from something growing inside the bulb of your blower. Anyway, after awhile, it sticks and you need a wet clean or two. I use Copperhill.

+1 lochness monster

any other shots that it appears on? that was at f8. mine had serious dust and oil from the mirror motor thingy but was not visible until f16 or higher. could be dust in the air not on your sensor in front of the camera as you clicked the shutter. use the notepad trick as mentioned above or just full size a white base layer in photoshop. to shoot against before you poke the sensor.

POTN Head wrote in post #8482855

[GIFS ARE NOT RENDERED IN QUOTES]

or a yeti?

lol my vote is on yeti.

You guys are complicated with the "notebook pc photoshop white layer dust detection process". Just put it in Av or M, switch lens to MF, crank the aperture to a large #, and shoot something blank (copy paper, wall, whatever you can find) no PC necessary. I use the light tan wall in my dining room or whatever I can find if I'm not at home. As long as it's a solid light color, you're good.

Another vote for copperhill here. Works great and easy to do. That reminds me, it's probably about time to clean it again... since I've been doing a lot of hiking with the camera lately .

I don't see anything. [Shrugs]