4. Lenses
4.4 Adjust zoom, focus and iris
General
Zoom controls the size of the projected image.
Focus controls the sharpness of the projected image.
Iris controls the contrast and focus depth of the imag e. Dec reasing the iris stop will inc rease contrast and image depth, at the same
time as it decreases brightness.
Lens z oom, focus and iris adjustments are done manually; they are not motorized.
Not all lenses have zoom o r iris control. The table below show s what controls are available pe r lens.
EN51 EN52 EN53 EN54 EN55 EN56 EN57
Iris control
✔✔✔
✖
✔✔
✖
Zoom control
✔
✖✖
✔✔✔
✖
Focus control
✔✔✔✔✔✔✔
For best results, lens adjustments should be done in the following order: zoom, focus and then iris (where applicable).
601–0307–00 F50 25/02/2016
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