Zykkor fish-eye lens

[Mack Diver]

I was cleaning in my shop recently and came across this lens. It is a Zykkor Super Wide Semi Fish-Eye 0.42X. On the side it say Macro and S7 / 52.

Any ideas what camera this might go to and what it might be worth???

Thanks for your help.

Mack

 

[Mariozi]

Seems like a screw-in adpater that fits (most probably)52mm threads, mostly used for video.
0.42x means it alters the focal distance by this factor... example a 35mm would become a 14.7.
The "fisheye" in these cases are not correctly applied since most of the time they do not produce a calibrated circular image where the distance/angle ration from the center remain the same or varies at a predetermined ratio.
The macro and S7 inscriptions are a mistery to me, can you put a picture of it here?
Anyway, these things are cheap and do not produce great image quality, most often applied on video setups.

Maybe the guys on the Videography forum will know more about it.

 

[Mack Diver]

Thanks for the usefull information!