Dust issue - Rebel XT

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  • 03-21-2007, 09:26 AM
    darkfiregt
    Dust issue - Rebel XT
    I've had my Rebel for about a year now. And I've noticed dust on pictures several times, but then it goes away, and I just assumed it was loose dust or dirt that landed on top of the lens and that wind kept blowing it away. Recently I discovered more of a pattern. When I turn the aperture up, I get dust. When I have the aperture wide open, I don't. It's the stock lens, btw, which is a EFS 18-55mm. I've taken the lens off and inspected the inside of the camera and lens as best I can (which is not all that great since I'm pretty new to digital slr), and I'm not seeing anything. I have a couple of new lenses on the way, but I still want to be able to use this lens. Is it the lens, or the camera? How should I go about cleaning it? Thanks for helping a digital SLR newb. Here's two pictures taken at the smallest and largest aperture so that you can see what I'm talking about.
    http://img116.imageshack.us/img116/328/img3397zh8.jpg
    http://img380.imageshack.us/img380/5998/img3398ix0.jpg
  • 03-21-2007, 10:27 AM
    SpeedingSphere
    Re: Dust issue - Rebel XT
    When you stop your aperture down, the DOF becomes less shallow and particles become more apparent.

    If you open up IE to a white page, take your camera and set it to the highest aperture(F/28 or whatever yours it) and properly expose a photo of the blanks screen(no matter the shutter length) you'll see your dust culprit. you need a blower bulb to get them off, or you can send your camera into canon and they'll clean it for a fee.
  • 03-22-2007, 06:54 AM
    darkfiregt
    Re: Dust issue - Rebel XT
    Thanks, that makes sense. That's what I figured. I'll give that a shot.