While providing modern mechanics and reliability, Angenieux’s unique approach to customization allows for, essentially, in-lens filtration at the rear, as well as in a central “slot” immediately before the iris. The irises can also be changed from the standard nine-bladed version to others, including a three-bladed design (for triangular “bokeh,” recalling some vintage lenses), or an oval shape for classic elliptical out-of-focus highlights as seen with many anamorphic designs. In addition, front elements are available coated or uncoated.
This unique design approach—internal and rear filter options, uncoated elements, and alternative iris designs—allow for an incredible number of different in-camera effects, as well as the ability to push and pull image aspects, such as contrast, resolution, flare behavior, bokeh character, and effects such as streaking. Angenieux refers to this customization as Integrated Optical Palette (or IOP).
At the rear of each lens are two threaded filter stages, one for when imaging to Super35-format sensors (40.5mm) and the other (46mm) for use with full-frame sensors. These rings can accommodate a special vintage-style filter that can help re-create looks from the golden age of cinema.
The central IOP stage can accommodate a wider range of filter types including streak filters (in colors like blue or orange), a “cracked” filter for elegant aesthetic distortions, and an uncoated element to provoke flares and reduce contrast. A “clear” filter is also available, which can be modified in any number of ways (think hairspray or Vaseline).
Another unique aspect of the Optimo Primes’ customization options is that modifications are relatively quick and easy for a qualified optics tech to perform or return to “stock.” The rear filter stage can be quickly and easily changed in the field, while the central stage, immediately before the iris, and the iris itself, can be modified in about 15 minutes at the bench.
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