Schneider-Kreuznach Center-Filter for 90mm f8 filter holder But on the 28mm

But on the 28mm

rigid or collapsible

in my opinion

or to any 1/4" or 3/8" threaded receptacle

4 AI Nikkor is in excellent condition with only minor cosmetic wear and slight dryness in the focus

Schneider-Kreuznach Center-Filter for 90mm f8 filter holder But on the 28mmThis 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