ReelFilmGeek
Well-known member
I have seen a few moddified Sigma 18-35mm lenses with aperture rings and wanted to know if anyone knows of how its done? I believe GL optics does one but its close to 4-5k which is more than I want to spend so I wanted to know if there was another way as every adapter I have used so far has no actual markings for f stops so judging my iris is tough. That plus the adapters I have used for the sigma nikon mount on sony cameras have very little movement to control the iris and makes fine adjustments tough.