NiSi Optics' new 150mm Explorer Collection ND filters claim to be twice as durable as other filters

NiSi Optics USA has launched its new 150mm Explorer Collection of square neutral density (ND) filters, which it claims are twice as strong as other glass filters on the market thanks to a 'special glass hardening process.' The 150mm Explorer Collection is identical to its 100mm predecessor in all but size and work with any of NiSi Optics USA's S5 and Q system 150mm filter holders. Like the 100mm options, the 150mm Explorer Collection is made from B270 tempered glass and includes the following 2m...