Hi Matt, thanks for your reply.

Its not a filter. It unscrewed from deeper inside the lens (maybe I shouldnt have taken it out) Its like a magnifier, about 10mm in depth.

The other lens is a 35-70mm so a wide angle would be more useful.

How do you like your KX?

Cheers, Dave.

Hi all,
wondered if someone could throw some advice my way. I have owned a pentax SFXn film camera since early 90's with a couple of SMC F lenses.
I am looking to buy a new digital camera and have looked at the Pentax offerings (kx,k7)
All the reviews are favourable and; if my research is correct, believe my lenses are fully functional with the new digital range. Is this correct. Also the 70-210 lens has a kind of ring of fog on the inside of the small glass piece which unscrews from the front of the lens. Is there a way of getting into this piece, or can I obtain a new one from somwhere.
Any thoughts or help would be much appreciated. Dave.