Questions & Answers for: General parallel perpendicular Optics

...parallel to ground) and plumb (front to back perpendicular to groud). Many times they overlook the corner to corner balance. I think corner to corner is more important than being plumb or level. Try ...

...parallel to ground) and plumb (front to back perpendicular to ground). Many times they overlook the corner to corner balance. I think corner to corner is more important than being plumb or level. Try ...

...parallel to ground) and plumb (front to back perpendicular to groud). Many times they overlook the corner to corner balance. I think corner to corner is more important than being plumb or level. Try ...