Why Do Anamorphic Lenses Produce Horizontal Flare
Posted 28 May 2011 - 06:40 PM
Thanks so much!
Posted 28 May 2011 - 08:07 PM
Point sources of 'real' white light in a black room can be good testers to point them at
Never had a chance to do it with a scope lens though - someone might be able to fill us in
Edited by Chris Millar, 28 May 2011 - 08:10 PM.
Posted 28 May 2011 - 08:25 PM
So since the front of the lens is a barrel-shaped cylinder of glass, a bright point of light basically smears across the surface on a horizontal axis. The lens coating usually gives this flare a blue-ish cast.
You can see some pictures of anamorphic lenses here:
Since from looking at the lens directly from the front, the cylindrical element looks square-ish, this is one reason why rear-adapted telephoto anamorphic lenses sometimes produce a square-shaped bokeh.