This filter holder allows to use 100mm flilters with the lens in super wideangle mode. When digitally corrected (in conjunction with the E-M1 II), no vignetting occurs.
You need 4 screws to mount the hood to the inner ring. Use either set screws (M5 x 10) or the fixing screw I provide here in the shop. Using 3 set screws and one of the
fixing screws (or another screw you can easily turn by hand) keeps the holder together and allows blocking rotation if needed.
Please note: Shapeways delivers printed parts only. You will need felt pads and o-rings to turn this part into a working filter holder.
See
https://helge-suess.com/hardware-en/zuiko-mft-8mm-f1-8-fisheye-filterholder/ for more information.