I have been tasked with finding replacement lens for our Gravograph LS800. I keep hitting dead ends. There is information that was lost a long time ago that I need to find the right one. Does anyone have specs for the lens? The Focal Length was the only thing we could find in the old records. I have a lens company working with me but I need the missing information to track this down.
Here is my missing information:
Diameter -
Edge Thickness -
Is it Plano Convex or Positive Meniscus?
Can anyone help? Please.