Homebrew PCBs

Chris and others,
   
  Won't increasing the emission angle of the LEDs increase the undercutting effect and ultimately the resolution achievable when exposing a board using these LEDs?  Since we are talking homebrew boards, how much do we really need to worry about light collumation vs the granularity (resolution) of the artwork?  Is there some sort of rough formula?
   
  dave mc
   

       
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