PF4K Operation
Page 35
Flat Port
Optical material:
Optical-grade acrylic or anti-reflective coated glass.
Purpose:
Medium to macro imaging.
Advantages:
Zoom through
. Flat Ports retains the zoom capability of a lens.
Macro.
Flat Ports are excellent for macro shots and/or the use of close
up diopters to capture small subjects.
Disadvantages:
No wide shots.
By their nature, Flat Ports do not allow wide shots.
Loss of FOV.
Like a SCUBA mask, Flat Ports decrease FOV by 25%.
NOTE
:
The optical interaction between any given lens and a Dome or Flat Port is
unpredictable. Distortions and aberrations can occur with either port. As such,
Gates does not warrant optical performance or image quality.
Gates endeavors to collect data from the field and our own testing as a resource to
customers, but you should always characterize your lens of choice for use
underwater.
