[xelasnave]

I purchased a Nikkor lens? AF 50mm f/1.8D.
Gave it a short run last night but I noticed that I had to take it out to infinity such it would go no further...lookinh in the camera display focus looked good ...however when trying to process I now notice that I have little doughnuts for stars...it seems like I need more in travel although I will check again that maybe I went too far...assuming the worst I am thinkng that maybe by adding a "protective" filter (as you do with a camera...I think they call the uv filters but the idea is merely to put a glass barrier in front of your lens) in the hope that I get a better focus...what do you think?
Alex