While this used Zeiss filter option is no longer available for rent, here’s a link to our current selections.
To counteract light falloff when using extreme wide angle lenses, center filters are required for even illumination across the film/sensor area.
This is a specialty filter designed specifically for the Zeiss ZM 15mm f/2.8 Distagon.
It’s essentially a center ND filter that compensates for the natural vignetting effect and provides even tonal reproduction across the image field. Its center portion provides 1.5 stops of ND filtration.
Since many people may use the ZM 15mm f/2.8 in low light without this filter, we rent it separately to help keep the lens’s rental cost down.