I purchased a cheap $16 Variable ND filter from amazon a couple months ago. I have used it for a couple shots while out and about, but never tested the image quality until tonight. I must say, I am quite pleased!
This first shot is a three-shot combined exposure, from 4 second exposure to 1/2 second exposure
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This is a 4-second exposure at f14
IMAGE LINK: http://www.flickr.com …/26981868@N05/7553029698/
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These next two are 200% crops....can you tell which one is just the lens @ 1/250 sec, and which one has the Vari-ND filter on @1/3 sec??
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Sure it is not perfect, but it's also not $450 like the Heliopan!!! For $16 it is a real fun thing to play around with!!







