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70-300mm IS USM
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Post 70-300mm IS USM 
Hoping someone can give me a bit of advice,
I've got a tiny mark on the lens/or dust spot deep inside the lens that shows up when on Max Zoom and against the sky ..
I can see it through the Viewfinder and after checking on another lens (same type) concluded it's on my Lens ..
Is there anything I can do about it or am I stuck with it ?



Steve @funtera
EOS50D & EF 70-300mm IS USM Combo
HATO/FOX2 Refugee
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I have a 400mm with dust inside and quoted by Lehman's of Stoke to have it cleaned and checked right through the lens controls it would cost me 179.00
to get this done, you can see the dust by holding the lens up to the sky but this should not show up on your pictures, have you checked that it is not on the
front or back of the lens?.

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I've checked Mate ..
taken off UV filter and cleaned all surfaces, cleaned the sensor (before I found it's the lens) and cleaned the Body Side lens .. it's only shows when going past 250mm ranging
it's deep



Steve @funtera
EOS50D & EF 70-300mm IS USM Combo
HATO/FOX2 Refugee
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well, I took a risk and cleaned the lens with IPA Isopropyl Alcohol 70% ... looks perfect now but will have to wait for daylight to confirm 100% but test shots against a Vulcan print have shown the speck gone..



Steve @funtera
EOS50D & EF 70-300mm IS USM Combo
HATO/FOX2 Refugee
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Good  Good  Good

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