I have to add one important (I think) note.
It is necessary to keep in mind that Peleng is 180 degrees fisheye lens.
So, make sure that no parts of your camera setup is in front of the lens front element, or it will appear in the field of view (it is so with Konvas sync motors, particularly).
It is possible to crop the image during print later, but it is better to consider this before buying this lens. BTW, I have them in PL on Konvas/Kinor (OCT-19) mounts ;)