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I3. Getting a shallow depth of field for the filmic look
For a shallow depth of field, film-like look it is often
desirable to use a large iris (f1.4 – f4). With large iris
settings you will get the greatest difference between the
in focus and out of focus areas of your footage. If you find
that your footage becomes over exposed when using a
large iris you should consider introducing the ND filter to
reduce the exposure level.
In very bright scenes you may observe softening of
your footage if you use a very small iris. This is due to
diffraction effects and as a result you should avoid using
very small iris values (f16, f22 etc). Most lenses provide
the best performance in the middle of their iris (aperture)
range. Use the camera’s built in ND filters to maintain your
desired exposure rather than very a very small iris when
there are high light levels.
I. Aperture/Iris and Auto Exposure
