I have the Costa Harpoons with the mirror blue 580 lenses, and they work great for me for sight fishing.
They are basically an amber when you're looking through them.
I picked the blue mirror because I originally got them for offshore saltwater fishing and castnetting bait
inshore (and I prefer the way they look
), but they also work great for me for sight fishing bluegill,
shellcracker, ect. in freshwater. I've tried a friend's pair in copper, and I could personally see better
with my own, although his were the plastic lenses and mine are glass.
I would suggest going in a store that carries them and trying the different frame styles on before buying.
I tried several different styles that didn't feel quite right, but then I put on the Harpoons and they were a