When Lee released the ‘Big Stopper’ in 2010, they massively underestimated how much of a demand there would be for a decent 10 stop filter. Before the Big Stopper arrived, the only square 10 stop ND filter was the 10 stop filter from Hitech. Unfortunately this filter had a few problems. It was very prone to flare even if you covered all around the filter. It also was sensitive to IR which gave a hard to remove colour cast to foliage and greenery.
Fast forward 12 months and Lee cant make enough Big Stoppers to meet demand. The glass for the filters is sourced overseas, so supplies are patchy with people having to wait quite some time before receiving their filter.
The people at Formatt-Hitech saw how much of a demand there was for this filter and decided to...