I believe that is the Fuji Dental Eye.
Charlie
On Wed, Aug 13, 2014 at 11:51 AM, Rick Beckrich <rbeckrich@xxxxxxxxx> wrote:
> Didn't someone, Nikon maybe, make a macro lens with a built-in light? Seem
> to recall seeing one in a dentists office... Way back when l still had
> teeth.
> On Aug 13, 2014 11:40 AM, "Piers Hemy" <piers@xxxxxxxx> wrote:
>
> > I did the same as Chuck. It's not going to be easy.
> >
> > First, never mind the equipment side, think of the subject - you
> (Kerstin)
> > will need a way to keep the subject's head still in a fixed position,
> with
> > the eyeball staring at a fixed point (actually, get the _other_ eyeball
> > staring).
> >
> > Second, illumination is key. Assuming that the idea is to get detailed
> > images of the structure of the iris, the problem is that you need lots of
> > light (given the high magnification) but the iris is buried in highly
> > reflective material, so reflections are as big a problem as illumination.
> > While a ring flash will probably overcome these two problems, it will
> also,
> > probably, blind the subject! So more illumination isn't the answer - you
> > need highly concentrated light, and likely off-axis (the opposite of what
> > you would need for retinal photography).
> >
> > Here's a couple of pretty technical papers showing how it's done for
> real.
> > The first is in German (OK for Kerstin?) and is historical, but might be
> > useful to explain the general set-up:
> >
> >
> http://www.med-hist.uni-kiel.de/images/stories/pdf/Spaltlampen_Koppenhoefer
> .
> > pdf
> > The second is the current Zeiss approach:
> >
> >
> http://www.meditec.zeiss.com/88256DE3007B916B/0/506FBA0E8FCB598E882571D8007D
> > 4B40/$file/spaltlampen_eye_exam_en.pdf
> >
> > If you want to search further, try the term "slit lamp camera".
> >
> > I don't suppose that either of the links will provide what is wanted, but
> > will give hints as to how to get started. Aside from the "fixing the head
> > in
> > position" issue, I suspect a small, bright LED penlight shining obliquely
> > on
> > the iris might be the way to go.
> >
> > Piers
> >
> >
> > -----Original Message-----
> > From: olympus
> > [mailto:olympus-bounces+piers.hemy=gmail.com@xxxxxxxxxxxxxxxxx] On
> Behalf
> > Of
> > Chuck Norcutt
> > Sent: 13 August 2014 01:47
> > To: Olympus Camera Discussion
> > Subject: Re: [OM] How to photograph the eye
> >
> > I looked around on the web for suggestions on photographing eyes. I
> > thought
> > most of the suggestions were pretty useless. Some using ring lights
> showed
> > reflections of the lens but nothing quite so distinct as what you got
> here.
> > Some showed beautiful images sans reflections but the advice usually
> ended
> > with something like "use a macro lens". None gave any good advice on
> > lighting.
> >
> > Chuck Norcutt
> >
> >
> > On 8/12/2014 12:15 PM, Jez Cunningham wrote:
> > > Like this? ;-)
> > >
> > > http://zone-10.com/tope2/main.php?g2_itemId=14118
> > >
> > >
> > > On 12 August 2014 15:41, 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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