Gelatine neutral density filters Gelatine Neutral Density Filters offer accurate achromatic attenuation and are sufficiently thin (0.1mm) not to alter appreciably the state of focus of a system. These Gelatine Neutral Density Filters are manufactured by dissolving colloidal carbon with certain dyes in a gelatine material to achieve the desired density performance. Although these Gelatine Neutral Density Filters are lacquered for protection they are of course easily damaged by moisture or heat and care is needed in hanging.
Knight Optical > Filters > Gelatin neutral density filters Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT Part No. Size/dimensions (mm) Thickness (mm) Density @550nm Trans (%) Price Qty Buy FNP0150 50 x 50 0.1 0.1 ±5% 79   £21.75 FNP0250 50 x 50 0.1 0.2 ±5% 63   £21.75 FNP0350 50 x 50 0.1 0.3 ±5% 50   £21.75 FNP0450 50 x 50 0.1 0.4 ±5% 40   £21.75 FNP0550 50 x 50 0.1 0.5 ±5% 32   £21.75 FNP0650 50 x 50 0.1 0.6 ±5% 25   £21.75 FNP0750 50 x 50 0.1 0.7 ±5% 20   £21.75 FNP0850 50 x 50 0.1 0.8 ±5% 16   £21.75 FNP0950 50 x 50 0.1 0.9 ±5% 13   £21.75 FNP1050 50 x 50 0.1 1.0 ±5% 10   £21.75 FNP1550 50 x 50 0.1 1.5 ±5% 3.2   £21.75 FNP2050 50 x 50 0.1 2.0 ±5% 1   £21.75 FNP3050 50 x 50 0.1 3.0 ±5% 0.1   £21.75 FNP4050 50 x 50 0.1 4.0 ±5% 0.01   £21.75 Knight Optical > Filters > Gelatin neutral density filters
Specification   Dimensions: 50 x 50 x 0.1mm Density: ± 5% (Measured in diffused light to ANSI PH2.19 1959)
Specific requirements We can cut Gelatine Neutral Density Filters to any size at short notice, so if your requirements are not listed please contact us by telephone / fax or email: stockrequirement@knightoptical.co.uk Options available   · Cutting down or edged to special shapes and sizes Technical Data Sheets Set of transmittance curves are available for each filter on request, please specify type. See also Glass neutral density filters Metallic neutral density filters See also FNP0100 Complete set (14 filters)