[Leica] Single element lens

[roark.paul at gmail.com (Paul Roark)]

Very cool.

When I was a kid I took the lens off an old hand held slide viewer and
taped it to the front of an early 20th Cenury 4x5 Graflex SLR.  It made an
excellent soft focus portrait outfit.

(And with an enlarger lens, the Graflex was a killer macro machine.  One of
my very first winning display prints was a tarantula that I chased down
with the Graflex.)

Paul
www.PaulRoark.com


On Sat, Aug 10, 2013 at 7:32 AM, <lrzeitlin at aol.com> wrote:

>  Back in the Dark Ages when I studied astronomy, astronomers still used
> single element lenses in refractor telescopes for many types of solar
> observations. Before the widespread use of lens coating, single element
> lenses, or at worst a dual element cemented achromat, had less flare than
> the much more highly corrected multielement anastigmat lenses. With long
> focal lengths, a narrow angle of view, and a maximum aperture of f11 these
> lenses were sharp and relatively flare free. Indeed, most of the early long
> focus Leica and Zeiss "telephoto" lenses used for sports and wildlife
> photography had simple cemented achromat doublets at the end of a long
> tube. It is possible to get very sharp photos with a simple lens but you
> have to work at it. It is so much easier today.
> Larry Z
> - - - -
> Alan Magayne-Roshak writes:
>
>
> Two taken with an old single-element (approx. f/2.8) magnifying lens
> mounted in an extension tube.
>
>
> Artificial lily in my office:
> &lt;
> http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Trees/20130726_MR_Mine_30D2037.jpg.html&gt
> ;
> Coneflower in front yard:
> &lt;
> http://gallery.leica-users.org/v/Alan+Magayne-Roshak/Trees/20130730_MR_Mine_30D2047.jpg.html&gt
> ;
>
>
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