Cinematic Image Control: Bokeh, Petzval, Lenses, Aberrations + Tests of the Out of Focus Areas

#bokeh #petzval #cinematography

A deep dive into the science of bokeh and the out-of-focus areas in the cinematic image:
the “Petzval Swirl” and what causes it; what shapes the bokeh; how to control bokeh; aberrations in lenses that affect the image, background, and the foreground; orbs of light and what they can illustrate about the optical system; Joseph Petzval; Nisen Bokeh; apodization and Smooth Trans Focus (STF) lenses; anamorphic lenses and “anamorfake” techniques; Onion Ring Bokeh, the image circle and CMOS sensor influence; and perceptions around circles of confusion.

In Collaboration with CSLA: https://cslarentals.com/

The Cine Lens Manual: https://www.cinelensmanual.com/
Shotdeck: https://shotdeck.com/

Lenses Tested:
CSLA Helix Primes
Zeiss Super Speeds
Richard Gale Optics Clavius Primes (Helios Rehoused)
TLS Petzval Primes
Atlas Anamorphic Silver Edition

Chapters:
0:00 Introduction
7:00 Optics
12:18 Circles of Confusion
15:06 Field Curvature
17:53 Astigmatism
22:09 CSLA Helix Primes
22:52 The Image Circle
27:43 Optical Vignetting
29:49 Spherical Aberration
34:24 Aspherical Elements
35:37 Bokeh Tests
38:50 Fake Anamorphic
39:25 Bokeh Tests Pt 2
44:17 Thank You