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Amazon.com : Heliopan 77mm Neutral Density 3.0 Filter (707789) with specialty Schott glass in floating brass ring : Camera Lens Neutral Density Filters : Camera & Photo
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Amazon.com : Heliopan 46mm Variable Gray Neutral Density Filter (704690) with Specialty Schott Glass in Floating Brass Ring : Camera & Photo
Did i do something wrong with this variable ND filter?: Beginners Questions Forum: Digital Photography Review
![Amazon.com : Heliopan 77mm Neutral Density 3.0 Filter (707789) with specialty Schott glass in floating brass ring : Camera Lens Neutral Density Filters : Camera & Photo Amazon.com : Heliopan 77mm Neutral Density 3.0 Filter (707789) with specialty Schott glass in floating brass ring : Camera Lens Neutral Density Filters : Camera & Photo](https://images-na.ssl-images-amazon.com/images/I/715yM1dnNDL._AC_SL1500_.jpg)
Amazon.com : Heliopan 77mm Neutral Density 3.0 Filter (707789) with specialty Schott glass in floating brass ring : Camera Lens Neutral Density Filters : Camera & Photo
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