[Sca-cooks] Farsighted lenses

[TerryDecker]

Pardon, I have been reminded that Newton's Opticks is about the properties 
of light in lenses, mirrors and prisms.  The seminal work of optical 
geometry is the Kitab al Manazir, Book of Optics, by Abu Ali al-Hasan ibn 
al-Hasan ibn al-Haytham (AKA Alhazen) in the early 11th Century.  A Latin 
translation was published in Italy in the 16th Century.  Now back to my 
reading about peppers.

Bear

-----Original Message----- 

<<< I would think this would have been a
trial and error process with a lot of rules of thumb, but it's worth noting
Newton describes the optical properties of lenses in the 17th Century. >>>

Has this changed? Other than the price of having a bunch of lenses on hand?

Whenever I go into my optometrist there still seems to be a bunch of "Is 
this one better than the last?", "What about this one?", "Is this one 
better?", "Is this one better or worse?" etc. etc.

Of course once a particular lens is selected, today that lens can be 
reproduced with a reasonably high chance of success. And I can have it made 
out of glass, polycarbonate or other materials and coated with various 
coatings.

Stefan