What happened to cheap Variable ND filters? So I recently picked up the Sigma 30mm lens for the Sony NEX-7 camera and it's been the only lens on the camera since. Today I decided I needed a Variable ND filter and did some online shopping. For cheap, normally the Nature ND filter (seen here on eBay) was pretty good, but today it's going for around $50 bucks. Even the purplish color casting Polaroid Variable ND filter on Amazon is now being listed for more than $35 dollars (seen here)..

Now the option for a cheap Variable ND Filter for under $13.00 dollars is the Slim Variable Fader ND version from Fotga. The listing on the product details claim to use high quality glass from Japan that avoids color shift when changing densities. I doubt it's that good, but I can correct a little color cast through a WB shift or in post. I know Fotga has some decent products, but so far there's no talk about these Variable ND Filters. Not many options now for cheap Variable ND filters, so to find out if it's any good, I went ahead and ordered a 46mm.

Fotga Slim Variable ND Filters