Overview: Domes make it better underwater Domes help correct for aberrations that occur in water photography
because light changes speed as it passes through water rather than
air. Domes provide better results than flat ports, especially for
split (half up, half down) lenses, and make it easier to obtain
separation, as well as more "spectacular" separation. While dome
ports don't take anything away from your above-water work, their
impact or difference on the surface is irrelevant. Domes are ideal
for staggered layers and underwater work. Size matters In short, bigger is optically better for a number of reasons. But
it is heavier, bulkier and more expensive than a smaller dome. If
image integrity and results are a major concern, choose a larger
dome (180 mm dome diameter). If portability and ease of use are
paramount, the smaller dome (120 mm dome diameter) will give you
great "bang for your buck". Glass is optically superior Star Optic’s domes are made of optical glass as glass domes are
optically superior to plastic or acrylic and resilient to scratch
and harsh environment.
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