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lenses
Photo Information
Copyright: jaap polak (carper) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1973 W: 119 N: 2582] (8439)
Genre: Animals
Medium: Color
Date Taken: 2006-09-13
Categories: Insects
Camera: Canon 350D, Tamron 90mm macro
Exposure: f/10.0, 1/100 seconds
Details: (Fill) Flash: Yes
Photo Version: Original Version, Workshop
Date Submitted: 2006-10-27 12:51
Viewed: 3945
Points: 46
[Note Guidelines] Photographer's Note
As a result, the team of bioengineers came up with a relatively cheap and easy method for creating the artificial eyes that may in part mimic natural processes.

Image mosaic

Insect eyes, known as compound eyes, usually consist of hundreds of tiny lens-capped optical units, known as ommatidia. For example, a dragonfly has 30,000 of the structures in each eye.

Individual ommatidia guide light through a lens and cone into a channel, known as a rhabdom, which contains light-sensitive cells. These are connected to optical, nerve cells to produce the image.

The ommatidia are crammed side by side into bulges that create a wide field of view for the insect.

As each unit is orientated in a slightly different direction, the honeycombed eye creates a mosaic image which, although low in resolution, is excellent at detecting movement.

The team created the artificial eye by first creating a tiny, reusable mould with 8,700 indentations.

The pock-marked hemisphere was then filled with an epoxy resin that reacts when exposed to ultraviolet light to create a harder material with different chemical properties.

After being baked at a low temperature to set the material it can be extracted from the mould.

The result is a pin head sized dome with 8,700 raised humps arranged in a honeycomb pattern across its surface.

Each raised hump acts like a lens, focusing any light into the material below.

Perfect alignment

Over time the concentrated light reacts with the resin to form a cone that guides the light deeper into the structure.

As the light continues to burn a path through the resin it creates a tiny channel, called a wave-guide, which is similar to the rhabdom in an insect's eye.

The reaction of the polymer with the light changes the optical properties of the material meaning that all light that enters the wave-guide is channelled along its length.

The result is a tiny resin dome, covered in lenses and pierced by perfectly aligned wave-guides that channel light through the centre of the dome.

As the channels are created as a direct result of light falling on the lens, the researchers believe they could gain insights into the order in which these structures originally formed in insect's eyes.

"To me it makes more sense to have a lens first," said Professor Lee. "I don't think that you formed the visual nervous system first and then it fanned out."

At the moment, the artificial eye is not connected to any kind of imaging device.

here a very interesting site.

This are my first lenses. I used the tamron 90 and the 2x teleconverter together. I hope you like the result. I had not luck with the light that day and I used a monopod. I hope you like it.
gr. jaap

SunToucher, wuta, pvs, dew77, Alex99, hester, RAP, wallhalla15, Robespierre, Pentaxfriend, jhm, vanderschelden, ramthakur, horia, SkyF, scottevers7 has marked this note useful
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Discussions
ThreadThread Starter Messages Updated
To ramthakur: Your presence on this site is an inspirationcarper 1 10-28 13:10
To pvs: bedankt Paulcarper 1 10-27 13:39
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Critiques [Translate]

Hoi Jaap,
Goed om je weer te zien. Wat een mooie verhaal over het maken van insecten ogen. En dan ook nog een foto gemaakt met je nieuwe lens. Alles draait on lensen. Zoals altijd, weer een super mooie strakke foto met prachtig detail. Kleuren en licht zijn bijzonder mooi. Alleen de twee witte vlekken in de achtergrond vind ik iets storen.
Groeten,
Niek

Complimenti molto bella e ben fatta. ciao gigicacco

  • Great 
  • wuta Gold Star Critiquer/Gold Note Writer [C: 855 W: 2 N: 617] (2142)
  • [2006-10-27 13:00]

Een Prachtig portret Jaap, gaaf lenzen en mooie kleuren details pov bg en framing een mooi koppie , Groeten Teunie .

bonsoir jaap
effectivement,il n'y a pas photo!!!!
la profondeur de champ est nettement meilleur avec le tamron qu'avec mon bricolage.
il n'y a rien a dire sauf peut etre un peu de bruit residuel entre les pattes avant de la libellule.
laurent

  • Great 
  • dew77 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4432 W: 248 N: 4028] (13270)
  • [2006-10-27 13:14]

Hello Jaap,
I liked your macro a lot.It's sharp and crisp clear image.POV and framing are also a wonderful.Enjoy your new lens:)
TFS...:-)

  • Great 
  • Alex99 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4072 W: 133 N: 7096] (23735)
  • [2006-10-27 13:36]

Hi Jaap.
Perfect macro with excellent detailed face of dragonfly. Wonderful colours, excellent composition and framing, skilful work with flash. My best regards and TFS,
Alexei.

  • Great 
  • hester Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1515 W: 18 N: 3165] (11638)
  • [2006-10-27 14:07]

Wonderful sharp details, the eyes look amazing. Great POV and composition. Excellent macro shot

TFS

Karan

Hi Jaap, long time no see.
a very nice macro, this is very close.
The sharpness could maybe be a bit better but still a very nice close-up. Good POV and nic e colours.
Good handle of the flash.
Well done, my friend.

  • Great 
  • RAP Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2524 W: 345 N: 2373] (7405)
  • [2006-10-27 15:02]

Welcome back my old friend... it is very pleasing have you among us again.
Another stunning macro with amazing eyes details.

I like it a lot: composition, POV, DOF, focus, sharpness, color, lighting, background, framing, notes.

I don't like it: nothing.

With the admiration of always ... Ricardo

Great macro Jaap. I think this a female from Ruddy darter. Excellent composition with very good sharpness and very good details. Very good job. Well done. Thank you for posting. Have a great weekend my friend.
Gr.
Heinz

Hi Jaap,
A perfect macro from your hand. Super detailed, great sharpness and a strong visual impact. Composition is good and well choosen. I like it a lot. Compliments.
Regards, Ruud

  • Great 
  • osse Gold Star Critiquer/Gold Note Writer [C: 955 W: 0 N: 89] (7805)
  • [2006-10-27 19:47]

Hi Jaap
He is un shaved :) Great macro shot. Grat colours, light, sharpnes, details and DOF.
Excellent my friend

osse

Hallo Jaap,

Goede Macro foto
mooie lenzen perfecte details, POV en BG
de kleuren zijn op mijn scherm wat flets en net als paul zie ik ook ruis
vandaar de workshop

TFS Thijs
ps de link werkt(Perfect)

  • Great 
  • jhm Gold Star Critiquer/Gold Note Writer [C: 893 W: 0 N: 507] (1853)
  • [2006-10-28 2:15]

Goedemorgen Jaap,

Een moza´ek dit is wel het minste wat u hier kan over zeggen, dit is macro met een grootte M, ongelooflijk wat er in de natuur allemaal rondvliegt, maar het is kunstwerk om zoiets te maken, groot werk Jaap, en bedankt voor de zeer interesante link, zo leren wij even!

Prettig weekend,
John

  • Great 
  • pvs Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1127 W: 254 N: 3161] (14464)
  • [2006-10-28 3:59]
  • [+]

Ha Jaap,

een mooie macro en een leuk verhaal,de kleuren en POV zijn goed,maar ik denk dat het met de focus beter zou moeten kunnen,op mijn beeldscherm neem ik ook aardig wat ruis waar,desalniettemin een mooie opname en jammer dat de libelles al weer over zijn (althans hier in het hoge noorden),groetjes

Paul

Hi Jaap,
it's wonderful - a good hand and the Tamron 90 - also a good 2x teleconverter - you had the perfect combination for this fantastic close-up. And a friendly model - she is smiling ;-) I love your shot!
My 2xConverter isn't very good, don't know why, but the results are not satisfying!
I have a new 1:7 Converter from Soligor and now the combi is perfect.
Thanks for sharing yours, bye and have a nice weekend
Sabine - wishnugaruda

Dag Jaap,
Leuke macro.
Goed plaatje.
Bedankt en groeten,
Annick

Hello Jaap!
It is really wonderful to be able to see your pictures again.
A picture like this goes to prove your versatility as an artist of immense gifts from which many of us learn a lot about photography. Your presence on this site is an inspiration for all.
Thank you very much and enjoy your weekend.
Regards,
Ram

Hi Jaap,
Thanks for those interesting notes; I learned many things reading it! I love this close-up! Details are just great and sharp. I like those soft colors too and this POV. Sometimes those Dragonflies just seem like laughing :) TFS,
Claudine

  • Great 
  • horia Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2158 W: 224 N: 4749] (16656)
  • [2006-10-29 5:13]

Hi Jaap and very nice to see you posting again :) We've missed you photos and advices a lot

A very nice result of your lenses :) It seemss they work very well together. Judging after the picture i wouldn't have said you had bad lighting...everything seems to be more than ok.
The POV is excellent and the details and magnification great!
Also the note is fantastic - a wonderful read.

Bravo and TFS
horia

  • Great 
  • SkyF Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2234 W: 188 N: 1912] (8073)
  • [2006-10-29 8:54]

Hello Jaap,
Excellent work on this extreme macro. I know how difficult it can be to get close enough. POV, colors and use of flash is excellent. Great DOF and sharpness of all those details.
Very well done.
Sky

  • Great 
  • NINIX Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 158 W: 47 N: 355] (3001)
  • [2006-10-29 14:36]

Ha Jaap,

Lang niet naar je foto's gekeken maar het blijven meesterstukjes. Wow, wat een details. Het moet haast beangstigend zijn om door je zoeker naar zo'n close up te kijken.

Hendrik

Hi Jaap,
That is amazing! What a detailed full face shot! Spot on eposure has the colors looking great. the photo is superb, and the notes are very interesting and informative. Great job my friend!
Scott

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