Not sure why a number of pix in the link seem to be almost monochrome?
Was he using some monochrome light souce or were they really that color?
The animal eye pix are even more interesting in terms of non-circular pupils,
some with very irregular edges.
Maybe they have some advantage in detecting movement or making the resolution
vary with orientation,reducing the effect of sun on contrast etc?
https://www.behance.net/gallery/2123112/Animal-eyes
https://www.behance.net/gallery/7939489/Animal-eyes-2
https://www.behance.net/gallery/18351045/Animal-eyes-3
Wikipedia has a good discussion of speculative relationship as to why different
activities and species have different pupil shapes:
http://en.wikipedia.org/wiki/Pupil
Seems like if you are predator or night hunter more likely to have vertical
slit, if you are prey then horizontal slit.
Some Cats have round and some slit pupils, so not species dependent necessarily.
Just think of the bokeh from some of those pupils! That may help a prey animal
or predator detect movement in periphery ?
Maybe a large polystyrene food container over a flash would make a nice
diffuser for this kind of photography or a led ringlight.
It might also be a point source a distance away is better than a diffuse
source, as it will show the structure better, because of tiny shadows?
Tim
________________________________
From: Fernando Gonzalez Gentile <fgonzalezgentile@xxxxxxxxx>
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Sent: Tuesday, December 16, 2014 10:17 AM
Subject: Re: [OM] How to photograph the eye
Hi List,
Now it's me, not Kerstin, whom is interested on the subject.
Please take a look at the examples, here:
https://www.behance.net/gallery/Your-beautiful-eyes/428809
Yes, there are reflections on the cornea - there, one can have a clue
on what was used as illumination, so as to get lots of detail
regarding the iris surface.
The photographs show as far as the front surface of the crystalline
lens, and no more; sidelight seems to be enough but very important.
Wonder if it's sensible to try this using Velvia 50, my 80mm ƒ/4 +
65mm~116mm Tube _ and bouncing light from aluminium paper, folded as
if working as a flat or concave mirror.
Since aluminium paper's surface can be wrinkled, it might well reflect
and diffuse light.
I thought I could bounce the light of two T-32s heads on OTF-TTL mode,
and get the 80 macro to close at ƒ/8 or ƒ/11, and the Tube extended to
116mm if necessary.
I prefer to use Velvia 50, but I might as well gain +1 stop if needed,
using Velvia 100 or Provia 100F -
I really want to get pictures as those shown at the link (perhaps
better ... :-) )
Advice needed !
Fernando.
On Tue, Aug 12, 2014 at 11:41 AM, SwissPace <ian@xxxxxxxxxxxxxxxx> wrote:
> Kerstin wants to take images of her clients/patients eyes, not the inner eye
> but a close up of the cornea etc.
>
> any ideas on the best way to do this and get onsistent results, i.e. the
> same distance from the eye, she has an OMD with a few lenses plus access to
> an infinite number of OM lenses :-)
>
> my first thought is of some translucent tube with an on camera flash but I
> am sure the list members will have better ideas
>
> thanks in advance
>
> IanW
> --
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