Best price Fotodiox Pro 6.6″ x8.6″ Rectangular 0.9 (3 Stops) Hard Edge Graduated Gray filter for WonderPana 66 System Holder
- Premium Grade Optical Polycarbonate Filter
- High Quality, Super Thick, Multi-Coated Graduated ND4 Filter
- Practically Unbreakable and are Guaranteed Spectrally Neutral
- 24 Month Manufacture Warranty
Fotodiox Pro 6.6×8.6″ filters are the strongest in the industry at 4mm thick. Fotodiox 6.6×8.6″ filters are practically unbreakable and are guaranteed spectrally neutral to within + or – 3 in the a and b channels of the lab color space. Fotodiox Pro filters are also guaranteed to be within + or – 2 in regards to total light transmission. Fotodiox currently offers 6.6×8.6″ in 4 Graduated Neutral Density (ND) filters: .6 Soft Edge, .6 Hard Edge, .9 Soft Edge and .9 Hard Edge.