[Leica] The eye as a doublet.

[hopsternew at gmail.com (Geoff Hopkinson)]

Fascinating Larry. Well my personal set needs a CLA, no question.
I'm sticking with Leica's "19th Century approach" on my cameras though ;-)

2009/7/23 <LRZeitlin at aol.com>

> Goeff writes:
>
> How do you
> get doublet in there???
>
> Most of the strength of the eye as a lens is due to the curved shape of the
> cornea. The eye's lens does, indeed, adjust focus, at least until the age
> of 40 or so. By that time it loses flexibility and you have to wear glasses
> for reading. Actually the optical system of the eye is a bit more complex
> than I described. It has many of the structural features of the Box Brownie
> -
> or rather I should say that the Brownie has many of features of the eye.
> The
> diaphragm is behind the lens and the retina is curved just like the film
> plane of the Brownie. The only camera I know that consciously tried to
> emulate
> the optical characteristics of the eye is the original Riga Minox, f 3.5
> 15mm FL lens and curved film plane.
>
> In this computer centric age, Leica's approach to designing the best
> possible optics is so 19th century. Nature abandoned this method several
> million
> years ago. ;-)
>
> Larry Z
>
>
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-- 
Cheers
Geoff
Alles was eine gute Kamera braucht / Everything a good camera needs:

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