Dust ?

I have a DRebel and and a 20D. On my DRebel I shot a lot of photos and never had any spots (dust) in open sky. On my 20D I can't get away from dust spots. Why do I have sensor clean problems with the 20D that I never had with the Rebel.?

Don't whine about it.

A good sensor cleaning takes me about one minute to do, and it costs me about one penny. Life is too short to whine about sensor dust.

---Bob Gross---

I didn't notice any difference between the 300D and the 20D, maybe it's just bad luck?

Fair point, put rather bluntly.

My D60 has never had a dust spot (at least that I could ever find), but both my 10D and 1DsMkII have had dust and the 1DsMkII seems have learned how to collect it faster recently.

I have no idea why my D60 has ever had dust as I used it in dustier environments then I ever used my 10D. I can't say same for 1DsMkII as it has been in even dustier environments then either, so it collecting extra bonus dust does not surprise me so much. That and I left the camera on during lens changes a couple of times.

I just supect that some cameras have more static then others.

Last year while in Alaska I took a ton of images with the 300D. Most were shots of float planes in the air or on water. I had three different lens and changed back and forth often. In two weeks I never cleaned the sensor. Still the shots that I took of planes in the sky had no dust spots.

I bought my 20D in January of this year. When I got it home and took some test shots I found three dust spots. I took the 20D to the Panama Canal in April. Shot an average of 500 images each day. (changed lens back and forth). Dumped the images to my laptop each evening and cleaned the sensor (with a blower). I still found dust spots on some of the images.

I also did an air show (Thunderbirds) in April. Cleaned the sensor before and checked it with a few test shots using 50mm 1.4 lens against an off white wall. I took the 50mm 1.4 and my 100-400mm 4.5-5.6 L IS to the air show. Changed back and forth but not that many times. Got home and found dust spots (alot).

When I shoot with the Rebel I never even think about dust. When I pick-up the 20D the first thing I think of is "Do I have a clean sensor".

I don't know how long it takes me to clean the sensor nor do I whine. This thread started out as a question. Now with this reply it is just an observation.

With my 300D I don't worry about dust on the sensor.
With my 20D I worry about dust on the sensor.

I haven't had dust that couldn't be removed with a blower, but perhaps you are on to something. It'd be pretty hard to get a large enough sample to prove it though - especially since both cameras would have to be put through the same conditions! If a reason is necessary, perhaps it's something to do with the coating which appears to be the outermost layer of the sensor "sandwhich"? See http://www.canon.com …tail/digi_35mm/​lo_filter/. I don't think the 300D has this filter. Perhaps it gets a charge which attracts dust.

It's only a matter of time before all cameras will include nanobots that wander out every night and make our sensors (and the rest of the interior) dust free Perhaps not far-fetched at all ...

I wouldn't worry about it.

Just post your dust infected shots to a few psychic sites and they'll have you beleive they are the start of spirit manifestations

I just got the rebelXT (350D) and within 4 days had dust on the sensor (and behind the viewfinder).

A quick blast with a rocket blower sorted it out but on making a few online enquiries I discovered some basic guidelines:

As already pointed out, remember to turn the camera off when changing lenses to avoid static.

Don't used canned air.
The propellant can leave a white residue and the freezing temperature could possibly damage the sensor.
Any blowing method can sometimes just redistribute the dust in the body cavity.

Sometimes, due to moisture, heat, whatever, the dust can adhere to the sensor and blowing won't shift it, in which case you will need to use special pads and fluid and it may take several cleans to completely remove the stubborn particles.

This is a useful link on how to clean your sensor.

Oh and stop whining (joke)

Wow, he now offers a sensor sweep brush. Pretty cool. And the price is so much better than the $100 that the original company asked.
Although, I've always found the rocket blower to clean my sensor perfectly and easily.