In article <10jaut7$16l4g$1@dont-email.me>,   
   Martin Brown  <'''newspam'''@nonad.co.uk> wrote:   
      
   >Commercial ones with decent optical performance tend to be expensive   
   >unless they are mass produced for some other purpose.   
      
   For the purpose of emergency fire starting, half decent lenses are okay.   
      
   >Flat OHP condenser lenses are a good source of cheap big fast ones.   
   There is a guy publishing experiments with the optics of a flat tv   
   screen on youtube.   
      
   >Martin Brown   
      
   Groetjes Albert   
   --   
   The Chinese government is satisfied with its military superiority over USA.   
   The next 5 year plan has as primary goal to advance life expectancy   
   over 80 years, like Western Europe.   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)