Spots on Rebel XT image

Are they always in the same spot in different photos? There could be dirt on your image sensor. You'll have to remove the lens assembly and carefully blow out the dirt.

you sound like you have dust on your image sensor. Go to Micro-tools.com and search for their section on cleaning sensors - they have a full set of instructions. they also sell supplies. But beware it is easy to scratch the sensor if you press too had. Do at your own risk.

Do not use Q tips on sensors. Ever!!!

Hi,

Try using a sensor cleaning kit. It sound if you have dust on your sensor. The cleaning kit most probably will solve your problem.

Cheers

Spots
If you see bright circles or spots on photos taken with flash, and the lens appears to be clean, then this is probably caused by particles (dust, pollen, etc) in the air.

See:
http://home.fujifilm.com/products/digital/shooting/flash.html
http://webpages.charter.net/bbiggers/DCExperiments/html/body_spots_.html 
http://www.fratkin.com/d320l/spots.html

There's also an interesting thread on the CANON DIGITAL PHOTOGRAPHY FORUM at <http://photography-on-the.net/forum/viewtopic.php?TopicID=2912> 

And an explanation of sorts at <http://www.fujifilmsupport.com/faq/tech/spot/spot.htm> 

I really don't know if a slave flash would help, because I assume the A40 flash would still be operating, but if you could borrow one it might be worth a try. 

Might be a wild goose chase, but you could try changing some small thing, just in case ... 
... like trying a different flash mode - slow synch for example?
... or different picture modes - perhaps snapshot or infinity?
... or changing from AUTO to Program, or from Program to Manual, etc?

Otherwise it's probably a case of waiting for most of the dust to settle, taking more than one photo, or just trying to do without flash whenever possible in that sort of situation ... 

Another suggestion I just came across is to use a Negative Ion Generator - used to purify air by precipitating out the particles. Don't know how well it would work - probably not very well if folk keep moving around - and sounds expensive, so maybe not worth buying one - but if dust is a regular problem, and you just happen to know someone that has one ...

poached from http://www.valsphotography.co.uk/information/Troubleshooting.html

hope this helps

It sounds like the aperture is getting set very high. If the aperture is a high number, the lens opening is very small which lets less light in and would cause a dark image. This would also show any dust that is in or on the lens or image sensor. The dust doesn't usually show on apertures with a larger opening (smaller number). Make sure your aperture is being set to a reasonable number, probably no higher than 8 or so.

You mean since beginig the pictures are not sharp as compared with images of similar cameras of other brands, such as Nikon etc. Then there is no defect in your camera. the images of canon EOS 350D are softier then Nikon.

spot is dust on the sensor. unfortunately, you will have to clean your sensor by yourself (it cost 30$ in a shop) There a fonction in the menu that up the mirror so you can access the sensor. very carefull. the pixel are so small that you can not see the dust but they are there!. caution, you need to put your body on a pod, have a good light to see what you make and some adapted items to clean the sensor. If not neede, avoid liquids. good luck and don't panic.

have u changed the PAL or NTSC seting ? u can find it in video system in the last seting menu

put in p mode and go to the sensor cleaning function you need whats called a lens pen it will clean those spots easy just be gentle.

Sounds like you have dust on your censor. There are countless ways to get dust off of your censor, just look around on google. I would suggest that you be careful when you change your lenses thoughs.