Most helpful critical review
Slopy build quality lets in dust between the two filter layers - nightmare!
on 21 August 2014
Although this ND filter does what it says on the tin, its build quality is poor. This means that I have to regularly disassemble it to remove dust and grit from between the two filter layers - a major pain in the neck as it never happens at a convenient time. After all, the filter comes out only when I need to take photos with it and this is rarely somewhere where I have the time, tools and clean environment to break it down, clean the dust off and put it back together...