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black spot appears in the image on the 600mm

bobpilot

Washington, US
3842 posts

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bobpilot Silver Member Nikonian since 08th May 2007
Sun 21-Oct-12 11:07 PM

I used the D3s and the 600mm for two days at a Civil War event. A black shape appears in lower left of the image with the 600mm; the shape does not appear when other lenses are attached.

I noticed this after the first day and cleaned the camera with an air blower; this was before I knew the shape showed up only on the 600mm; but it never hurts I suppose.

On day two I cleaned the lens of all dust, and yet the shape still appears.

What is this? Is there something internal to the lens that is broken or dirty? It does not seem like a dust spot.



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