Hello all. I have a Kodak 18" Ektar Process f-10 lens. The lens stops down to f-128 or so with the iris and then it also has an aperture wheel with rather small holes drilled into it that pivots into the lens barrel . It is indeed coated but the coating is a rather heavy looking gold color. What is this coating, is it common and is it's purpose related specifically to it being a process lens?
Also, I have had the thing for many years having taken it from a heap of stuff heading for a dumpster (it's in the original wooden box) but I have never had a camera big enough to handle it. Is it well known or just another process lens and by any chance does anyone know off hand what the image circle is? I'm not planning on selling it I just want the info for my own knowledge.
Thank you all for your expertise and your willingness to share it. -Steven