From: rrllff@yahoo.com   
      
   On Tuesday, November 5, 2013 11:30:56 PM UTC-5, gr wrote:   
   > On 11/5/2013 1:23 PM, Helmut Wabnig wrote:   
   >   
   > > Any ideas how to mitigate a severe scratch in   
   > > the front lens of a fotoobjective?   
   > > Can only take shots in nebula   
   > > or have to correct fotos with software effects.   
   >   
   > > Polishing?   
   > > Filling the crack with something and polish?   
   > > Oil on the front lens?   
   >   
   > > w.   
   >   
   > Black grease pencil is somewhat effective- I have seen special ones for   
   > sale for use with eyeglass scratches.   
   >   
   > Windshield repair places have some UV cure filler they use for big   
   >   
   > dings- maybe.   
      
   Don't forget you need to maintain the surface figure.  Anything   
   that changes the surface profile will result in image   
   artifacts.   
      
   http://www.richardfisher.com   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)