(Another) Unknown lens

[Joao]

Hello
This lens was attached to a recent buy (Pentax Spotmatic F).
I was not able to find anything about it. Can someone give me any information / opinion about this lens ?
Thank you in advance
Joao

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[greyelm]

https://camerapedia.fandom.com/wiki/Sun

 

[Joao]

https://camerapedia.fandom.com/wiki/Sun

Thank you.
I am also looking for some user's comment/ experience. I certainly will test the lens but I would like to know what to expect-
Regards
Joao

 

[tunalegs]

You're going to be the first to report. I wouldn't expect anything extraordinary though.