found at DigiDirect
The PolarPro Summit ND1000 Filter is an ultra-dense filter from the Summit series for SLR, compact cameras. Used for shooting with long shutter speeds, reduces the amount of light entering the matrix by 10 times. Full-spectrum filters are hyper-neutral through 1200nm ensuring color reproduction is fully neutral.
The square filter is made of quartz glass in an aluminum frame, inserted into a special slot of the base frame of the Summit Filter System.
PolarPro's ND filters are neutral well into the IR spectrum to eliminate IR contamination.
Aluminum frames builts onto each filters for fingerprint free installation and maximum protection.
Quartz Glass and hyper neutral coating process ensure your composition turns out exactly how you envasion.
Easy to read indicators located on the filter tab and storage case for quick accesibility.