>>4220784Barely any adapters are 75mm, and the ones that do exist make the threading bigger, meaning the lends hood would no longer fit, or much too small, meaning major vignetting. I found one old 75mm UV filter for sale, but it's ~$40 with another ~$40 shipping from Europe. Not worth it.
This is a cropped shot, you can see what the fringing is doing to the colors in the light spots. This was shot at f/8, so wide open, which might have something to do with it.
That said, the internal lens design is stupidly simple. Single group of 2 elements in the very front and no other glass inside. 24-blade aperture though, which is pretty.
