Optical distortion in anamorphic lenses where focus shift causes lateral image shift creating breathing effect during focus adjustments.
Technical Details
Anamorphic lenses compress the image horizontally by a factor of 2:1 onto the sensor, creating different focal lengths on the horizontal and vertical axes. When focusing, the image size typically shifts by 3-8% with modern lenses like the Cooke Anamorphic/i or ARRI Master Anamorphic. Vintage lenses such as the Kowa Cine Prominar or Lomo Squarefront exhibit significantly stronger breathing with size changes up to 15%. Asymmetrical pupil distortion amplifies the effect, as the aspect ratio of the out-of-focus areas (bokeh) continuously changes during focus pulls.
History & Development
The phenomenon first appeared in 1953 with Henri Chrétien's original Hypergonar lenses, which were adapted for CinemaScope. Bausch & Lomb produced the first series anamorphics with pronounced breathing. From the 1970s onwards, Cooke, Zeiss, and later ARRI developed more precise designs with reduced breathing. Modern lenses like the ARRI Signature Primes (since 2017) minimize breathing through floating lens groups to less than 1% size change.
Practical Use in Film
Ridley Scott consciously used strongly breathing Kowa lenses in "Alien" (1979) for organic unease in close-ups. Christopher Nolan employs vintage Panavision lenses in "Dunkirk" (2017), whose breathing enhances the characters' anxiety. In digital productions, strong breathing requires stabilization in post-production or deliberate image composition with sufficient headroom. Focus pullers must work more precisely with breathing lenses, as changes in image size can distort framing.
Comparison & Alternatives
Unlike spherical lenses, which breathe minimally, anamorphic lenses show noticeable size changes. Master Anamorphic lenses reduce breathing to a technical minimum, while vintage lenses like Lomo or old Panasonic maximize the effect. Digital de-squeeze can correct breathing in post, but it eliminates the organic character. Modern full-frame sensors amplify perceived breathing due to larger image circles compared to traditional 35mm film.