Jul 22, 2006 15:41 | #1 Hi everyone, I have a 700-200 f4L and I am constantly getting this grey smudge on images, like so :
I know this can be post processed easily, but I would like to know how to fix it and what is causing it, as I have cleaned both the front and rear glass, possible on some glass inside? Thanks in advance. Sean
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kevin_c Cream of the Crop 5,745 posts Likes: 4 Joined Mar 2005 Location: Devon, England More info | Jul 22, 2006 15:44 | #2 Looks like dust/dirt on the sensor to me - do you have any other lenses to use? -- K e v i n --
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BearLeeAlive All butt cheeks and string.  30,200 posts Likes: 70 Joined May 2005 Location: Calgary, AB More info | Jul 22, 2006 15:44 | #3 That is most likely a dust spot on you sensor, does it show up with any of your other lenses? -JIM-
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BearLeeAlive All butt cheeks and string. 30,200 posts Likes: 70 Joined May 2005 Location: Calgary, AB More info | Jul 22, 2006 15:45 | #4 LOL, Kevin, you are a wee bit quicker on the draw I see. -JIM-
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Jul 22, 2006 15:46 | #5 Unfortunately no, if it is on the sensor do I need to send it away? Sean
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kevin_c Cream of the Crop 5,745 posts Likes: 4 Joined Mar 2005 Location: Devon, England More info | BearLeeAlive wrote: That is most likely a dust spot on you sensor, does it show up with any of your other lenses? I said that -- K e v i n --
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RoyC Goldmember  2,088 posts Likes: 21 Joined Aug 2005 Location: N.Devon, UK More info | Jul 22, 2006 15:53 | #7 Dust spots like this can be cloned out in seconds in your image editor. I have several on my sensor but they only show on sky shot of say f11 and over. TOP BIRD SHOTS
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BearLeeAlive All butt cheeks and string. 30,200 posts Likes: 70 Joined May 2005 Location: Calgary, AB More info | Jul 22, 2006 15:58 | #8 I would try a shot of the sky stopped right down to your smallest aperture on a couple lenses and see if it will then show up. It so, it is dust on the sensor and can be easily cleaned. It it still only shows up on the 70-200 it must be something with the lens. I have had dust in a lens though and it really does not show at all, at least it never in any of the pics I took with it even after searching hard for something. -JIM-
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Jon Cream of the Crop  69,628 posts Likes: 227 Joined Jun 2004 Location: Bethesda, MD USA More info | Jul 22, 2006 16:01 | #9 If everyone's finished gloating/moaning over who said what first :{)# Jon
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kevin_c Cream of the Crop 5,745 posts Likes: 4 Joined Mar 2005 Location: Devon, England More info | Jul 22, 2006 16:04 | #10 seanm - you may find this thread useful regarding sensor cleaning: -- K e v i n --
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