Lens technology....

[Flash In The Pan]

it's moved on a bit since the 1950s

http://farm4.static.flickr.com/3234/3101552536_3ecc2d824b.jpg

As the front element (from the lens of my Ihagee EXA IIa,above) shows :lol:

http://farm4.static.flickr.com/3196/3100715087_80cf7b5ce2.jpg

[Barlines]

I had to study that a bit - it looks like the lens from a pair of glasses I once owned :shake:

[Flash In The Pan]

I had to study that a bit - it looks like the lens from a pair of glasses I once owned :shake:

Did you end up cutting a marble in half and making a pair of contact lenses? :lol: