Named after a Dutch astronomer and mathematician AKA Snell . His name is usually associated with the law of refraction of light known as Snell’s law
Following this up I found this really interesting for underwater photography.
Possibly iSpot readers may already know this, but I found it fascinating.
I read it with interest - all new to me.
It says " similar to the effect of a [fisheye lens]"
So what do fish see; or marine mammals for that matter.
To his name: the Snellius glacier in Antarctica; 3 Dutch survey vessels; a lunar crater; he was probably was the first to try to do a large-scale experiment to measure the earth by triangulation, using church spires; and producing a new method for calculating π—the first such improvement since ancient times.
How have I never heard of him before now? I must get out more…
Remarkable info about fish eyes. Does not mention though if one system or the other is ‘better’ e.g. for seeing near and far things in sharp focus. Can fish focus on an object just in front of them and one far away or do they not need to focus on anything other than say a metre away as the water distorts or is too cloudy after that?