Sometimes the projected lights of the spots
over the floor appear ‘cut off’ on the circle of
light, revealing one side completely straight,
as if the light projected was, precisely cut off.
A good -and simplified- example is this:
http://perso.wanadoo.es/juanj_video/cutoff_light.jpg
Which are the parameters relevant to this?
Hope you can see it and shed ‘some light’
Greeetings,
Juan Javier Martínez.
Madrid, Spain.
www.juanjaviermartinez.com