Gates Underwater Products PRO ACTION, Руководство по установке, использованию и уходу

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PRO ACTION Setup Page 35
A Flat Port is used commonly for macro lenses, and also for medium to long focal
length lenses. The focal range that works best starts at approximately 20-35 mm.
Referring to the image, setup the SPR’s to extend just past the end of the lens.
Keep the entire SPR stack as short as possible while preventing interference with
the port.
Test for vignetting and image quality. If necessary adjust the position of the lens
with respect to the port and re-test to achieve optimum results.
Flat Port and SPR’s –
setup the SPR’s so they
extend just past the end
of the lens.