ADJUSTABLE SLI

PRODUCT DESCRIPTION

SKU: GP0520

Circular blacked metal screen, 75mm dia with 12.5mm central aperture. A screw controlled, spring loaded precision slit, Provides a maximum slit opening of 4mm approx., with useful length of 10 to 12mm. mounted on a standard 6mm dia brass rod, the optical centre height is 80mm approx.