Tried to find information in internet about the lens, and I did not, except a couple of pictures of this lens with Leica ...so I decided to go and buy this lens and see what happens.
The buyer showed the lens in the original packaging and said that this lens have not being in use since purchasing...well I was a little bit skeptical about that statement, but when I attached the lens to my K20D and tried to change either an aperture or focus rings, I could not...everything was stuck...so with the owner we managed to get aperture ring work, focus ring stayed at the position where it was left 20-30 years ago...
Ok, the owner just gave that lens to me and requested to fix it...he had the other stuff for Nikon so as longashe gave me this lens free of charge, I bought from him Nikkor 50 F/1.4...yes it works with Pentax...
So, going back to the Spiratone...upon getting home I tried to do something with the focus ring and gave up...I had just put WD40 in the space where in my opinion it should've been added and left it for a couple of days.
Each day I tried that ring but it was not moveable...OK, on day 3 I brought this lens to my basement for a more serious treatment...as you can imagine I decided to use a hammer to get the moveable element unstuck...so, the hammer did the job and finally and slowly I got some rotation...GREAT! I added more oil and finally got it work...
Now, back to the info I looked in internet about this lens...as far as the information is limited and there might be somebody who is looking info about the lens I decided to put some details about the lens.
I do not know how many elements it contains, it is very light and compact and has a great appearance.
3 rings on the body:
two are for aperture control and manage
1 - focus ring
As you can imagine all the settings are manual, but that is what I like and enjoy in photography (this is different story).
To attach the lens K to M42 adapter was needed.
Now handling:
focusing I found pretty challenging for me, the focusing ring rotates about 270 degrees; minimal focusing distance is 1 m.
I am not sure if that makes sense to talk about sharpness of this lens, again everything is manual...but for your consideration I am placing some pictures; you will sharpness of the lens wide open and color rendition...All the pictures where shoot in RAW format with some WB correction and sharpening in NikSoft.
Bokeh- I did not have a chance to check it out, but with 1m minimum focusing disctance I doubt that there will be something impressive...
Conclusion(very subjective):- I like this lens very much and colors it producers even with my old and still good K20D :-). I am thinking about K5IIs, so it might be even better.
Thank you for reading, I hope you found this interesting and useful...(sorry for any typos and grammar mistakes)...
The one below was PPed a little bit heavier: