Polaroid (polarizer) Polaroid (polarizer) Polaroid is a type of synthetic plastic sheet which is used as a polarizer or polarizing filter. A trademark of the Polaroid Corporation, the term has since entered common use. The original material, patented in 1929 and further developed in 1932 by Edwin H. Land, consists of many microscopic crystals of iodoquinine sulphate (herapathite) embedded in a transparent nitrocellulose polymer film. The needle-like crystals are aligned during manufacture of the film by stretching or by applying electric or magnetic fields. With the crystals aligned, the sheet is dichroic: it tends to absorb light which is polarized parallel to
MiNT camera generation was released in 2013 with improved charging time and an auto-sleep function. It can be used with color filters and provides a sync port to trigger external flashes. The MiNT Lens Set was also released in the same year. It can be used with any Polaroid SX-70 camera. The set includes an ND filter, blue filter, yellow filter, close-up lens and a fisheye lens to create different effects. Since Polaroid Originals (Impossible Project) film will exhibit red or yellow colour casts under bright sunlight and hot weather, using a blue filter will correct the white balance to a more