Schneider-Kreuznach Center-Filter for 90mm f8 filter holder it actually does a pretty

it actually does a pretty solid job on full frame cameras too

rigid or collapsible

Out of camera images are purple-tinted monochrome

Interior dimensions are approximately 16x16x29cm

9 Oscillo-Raptar was originally designed for close-up imaging of oscilloscope displays

Schneider-Kreuznach Center-Filter for 90mm f8 filter holder it actually does a prettyThis Schneider Kreuznach Center Filter is a specialized filter designed for use with large format wide angle lenses. This filter has a 1. 5 stop neutral density effect in the centre, with a radial clearing to the edges: effectively, it darkens the centre of the image to bring its exposure closer to the edge exposure, reducing the effect of vignetting. The Center Filter is designed for use with 90mm lenses (this one is designated for the 90mm f8 in