wrote:

I like glasses that I can use all the way up to dusk - because I often
fish well into dark, and am rarely bothered by even noonday sun, with
even the lightest sunglasses. What that usually means is I try to use
an AMBER colored lens, which I find to be the best for light
transmission at low levels. (With COPPER being second choice, and
brown and grey being not as good).

I don't know if there are varying levels of light transmission between
brands, aside from the color question. I assume there must be.

I've tried several of the common colors, and I don't find much
difference in fish-seeing performance. Like you, I want maximum light
transmission so I can fish into dusk. Overall, I prefer a neutral gray.
The maximum light transmission is theoretically 50% because of the
nature of polarization. That level can be approached with neutral gray,
but typical tinted lenses are below 20%. It seems like amber and copper
sometimes help a little in seeing the bottom of typical freestone
rivers, because the bottom tends to be amber or copper colored. (When I
look for fish in clear moving water, I usually try first to see the
bottom by "filtering out" the distortion from surface turbulence -- the
fish come next -- they tend to look like "bottom" behaving in an odd
way, like a moving shadow or a waving tail).

--
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