Variable neutral density (ND) filters are handy tools for photographers, in that their opacity can be adjusted simply by rotating them. So, why not use them for adjustable-tint sunglasses? Well, ...
If you are ever planning to shoot photography outside — whether it be a vibrant cityscape or gorgeous landscape — you will want to use a neutral density filter (or ND filter). An ND filter essentially ...
With prices for the K&F Concept Variable Fader ND 1-8.6 filter starting at just $20 for the smallest 40.5mm version and only going up to a still very affordable $30 for the most expensive 82mm model, ...
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