[Konvas] yellow lenses

[Henry Titchen]

Sun is apparently a common method to fix yellow optics. I have never
tried it however many others report success.

Please see the links below.

Heat can create problems with lenses so care is required!

http://www.pentaxforums.com/forums/pentax-slr-lens-discussion/47543-takumar-yellow-cast.html
http://photo.net/pentax-camera-forum/00RYOO
http://www.flickr.com/groups/spotmatic/discuss/121461/

Cheers,
Henry