Anamorphic lens DSLR camera tutorial
When filmmakers were itching for wider and wider field of views (FOV) for their movies, it got to a point where they wanted to get so wide that the 35mm film and spherical lenses they were shooting with couldn’t hold all the horizontal imagery they wanted without cropping the image.
The solution? Literally squish the image horizontally using a special lens so it could take up more vertical space, fitting a wider image on the finite area available to them on 35mm film. They could then un-squish the footage in post using a lens with the exact opposite amount of squeeze, returning the proportions to normal. The resulting effect is a panoramic aspect ratio that has the depth of field (DoF) of a longer telephoto lens but with a wider FOV.
Here is a portrait with a normal 85mm f/1.4 lens:
…and here is a different photo with the anamorphic in front of the 85mm. I’m the exact same distance away from her and the only thing I’ve changed is putting the anamorphic lens in front of the 85mm f/1.4:
…and here is the same image after it’s been un-squished:
…and here is a different image using just the 85mm f/1.4 with no anamorphic lens from another 5 feet back, in an attempt to get the same field of view:
It should be pretty obvious that not only is the bokeh less pronounced, but I didn’t get nearly the same width in the FOV.