Long Exposures with a 10 stop variable lens

perkyjude (e2 Member)

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9 Aug 2012 - 8:17 AM

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Hello Everyone.

I have a mystery for you. I took my new 10 stop variable lens down to the beach yesterday to try my hand at long exposures. I used my 18-105mm lens, which I use daily, with the new filter and I got this strange result. See picture. All the photos with this lens came out like this . So after a little panic about my filter being faulty, I put the filter on another lens, my 70-300mm (the only other 67mm fitting) and I didn't have any problems, photos did not have this mark on, but I obviously didn't want to use this lens for long exposures. Argghh. I have no idea what is causing this.

Please help. Jude ♥

lemmy

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9 Aug 2012 - 11:24 AM

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I find mine can give strange results at max density. As lobsterboy says, these are polarisers and the direction of the light can have an influence.

NEWDIGIT

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9 Aug 2012 - 12:35 PM

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Lobsterboy has it right the only way to gaurantee even light reduction is to use a fixed strength ND.
All the various variables have this problem, some worse than others,at the max setting particularly with the wide angle lenses