<< Previous Next >>

2nd YEAR


2nd YEAR
Photo Information
Copyright: Francisco Mello (Mello) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 140 W: 34 N: 480] (2419)
Genre: Animals
Medium: Color
Date Taken: 2010-01-05
Categories: Insects
Camera: Nikon D300
Exposure: f/1, 1/250 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2010-02-13 18:04
Viewed: 5371
Points: 56
[Note Guidelines] Photographer's Note
Hello everybody!
I’m very happy about my 2nd anniversary sharing my passion with you, my TN friends.
I’ve been learning a lot with you all, and I’m thankful about it.

About the picture :
Continuing with odonatas...
THE WAY I LIKE! A SUPER MACRO VIEW!
Unfortunately I found this dead dragonfly during a walk with my wife. I got it and held it the whole walk, than I finally got home and took some macro images from these eyes (I used 28-80mm Nikkor inverted lens). Probably it hit on the windshield of a car because its face was screwed up. Anyway for the image purpose it was useful.
I hope you like this one and thanks about your comments in my previous post.

Compound Eyes
Basic structure and function
Compound eyes are organs of vision in arthropods (insects and crustaceans). A compound eye is characterized by a variable number (a few to thousands) of small eyes, ommatidia, which function as independent photoreception units with an optical system (cornea, lens and some accessory structures) and normally eight photoreceptor cells. The compound eyes do not form an image like the large lens eyes of vertebrates and octopi, but a "neural picture" is formed by the photoreceptors in ommatidia, which are oriented to receive light from different directions, defined by the optics of the ommatidia, the curvature of the eye and the spacing arrangement and density of the ommatidia (Fig. 1). The optical system shows numerous variations, depending how isolated the ommatidia are from each other and how light is focused onto the photoreceptors. Main variants are the apposition eye (ommatidia optically isolated; e.g. in locusts and beetles), superposition eye (ommatidia not isolated;e.g. in butterflies), and the neural superposition eye (ommatidia optically isolated but neuronal arrangement causes partial summation of pixels; found in diurnal flies)(reviews: Land, 1981; Stavenga 2006).

Light stimulation creates depolarizing graded potentials in insect photoreceptors (as opposed to hyperpolarizing in vertebrate rods and cones). Action potentials do not exist, generally, although they may have a role in photoreceptors of some species (e.g. in the cockroach, Heimonen et al. 2007). The signals are processed in the first synaptic layer, the lamina, and in the further neural centers (e.g. the medulla) in a retinotopic fashion. This means that the "pixels" created by the anatomical organization of the retina are being preserved. The signals and their information content change continuously, however. In deeper visual centers the retinotopic organization is disrupted to the benefit of higher level analysis, like motion detection, pattern recognition and visual orientation (Strausfeld 1976).

nasokoun, Jamesp, eng55, Juyona, roges, hansh, Silvio2006, montivipera, CatherineD, Heaven, nglen, maurydv, Noisette, jlinaresp, flashpoint, jusninasirun, Adanac, saeedabbasi has marked this note useful
Only registered TrekNature members may rate photo notes.
Add Critique [Critiquing Guidelines] 
Only registered TrekNature members may write critiques.
Discussions
ThreadThread Starter Messages Updated
To uleko: UllaMello 1 02-17 12:07
You must be logged in to start a discussion.

Critiques [Translate]

Congratulations, 2 years with splendid macro Francisco, and this is great one, an impressive close up with best clarity and colors output! bravo!
keep photographing! TFS
Nasos

  • Great 
  • Jamesp Gold Star Critiquer/Gold Note Writer [C: 1369 W: 9 N: 6334] (18906)
  • [2010-02-13 22:59]

Hi Francisco

Congratulations on your second anniversary! AMazing macro with excellent detail and saturated colours.

Best wishes

James

Well done with catchy colors and sharp detail. Best of all is your composition. It has a nice balance and well managed dof. Replete even with a yellow heart shaped blob for Valentines day above the eyes, this is great photo. TFS, J

  • Great 
  • valy67 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1727 W: 59 N: 3060] (9219)
  • [2010-02-13 23:27]

Hello Francisco !
Wow, that is real close ! I don't think I have even seen a Dragonfly from this close ! :-) I really like the pattern made by the facets on those two huge eyes. And the heart shape is perfect on Valentine's Day, also. It is a great picture to celebrate your second year on TN, my compliments, it is along time and you have contributed to this site with lots of beautiful pictures.
Greetings from France,
Valérie.

  • Great 
  • eng55 Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1256 W: 42 N: 1976] (5892)
  • [2010-02-13 23:51]

Hi Francisco,
Congratulations on your second aniversary.
It's very nice macro work.Sharpness and
details are perfect.Have a nice sunday!
Thanks for posting..

  • Great 
  • jhm Gold Star Critiquer/Gold Note Writer [C: 893 W: 0 N: 507] (1853)
  • [2010-02-13 23:53]

Hello Francisco,


Congratulations two year TN with a lot lovely pictures, this is very nice.
Again a wonderful macro shot, yellow color care for a nice contrast.
Very well done.

Have a nice day,
John.

  • Great 
  • Juyona Gold Star Critiquer/Silver Workshop Editor [C: 2232 W: 10 N: 2971] (16891)
  • [2010-02-14 1:09]

WooW,
súper aproximación amigo,
gran calidad de imagen...
felicidades en tu magnífico aniversario.
saludos y mi admiración.

  • Great 
  • roges Gold Star Critiquer/Gold Note Writer [C: 957 W: 0 N: 1329] (6264)
  • [2010-02-14 1:16]

Hola Francisco,
olhar tão rápido pode "fazer tempo"!
Muito obrigado por esta super macro para todas as suas contribuições nestes dois anos de TN. Fotos comentário, linda, uma festa de 10 anos à espera de palavra!
Um bom domingo e um Feliz Dia de São Valentim
Adrian

  • Great 
  • hansh Gold Star Critiquer/Gold Note Writer [C: 277 W: 1 N: 741] (2762)
  • [2010-02-14 1:27]

Hi Francisco.

Congratulations with your 2nd anniversery on TN with beytiful photo's.
This one is very sharp, alle the lenses in the eyes are very well to see.
I am looking forward to your future posts, keep doing the good work.

Gr. Hans

Hi Francisco,
first - congrats, I'm so happy you are here, I love your wonderful work so much - extreme macros are also what I love to do - but your variety of insects is much more impressive than here in Europe.
This shot is fantastic, so sharp, so close, the eyes are very interesting to see.
Thanks my friend, very well done
Sabine - wishnugaruda

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5137 W: 166 N: 13121] (49139)
  • [2010-02-14 2:27]

Hello Francisco,
Congratulations on your second year here on TN. Indeed, you celebrate this milestone with a super macro. Superb sharpness and details. Very nice natural colours. Good choice of composition.
Regards,
Peter

Ciao Francisco, congratulations for your two years on TN and thanks for all your splendid photo, amazing portrait with fantastic details of multiple eyes, superb sharpness, very well done, happy Valentine Day my friend, ciao Silvio

Hi Francisco,

Congrats. on your 2nd anniversary. That's an amazing macro, thanks for sharing.

Regards, Nasit

Solo tanti complimenti oggi e auguri per il proseguimento della tua avventura su TN. Questa meravigliosa macro riconferma le tue grandi capacità. Grazie e a presto amico!

Roberto

Wow! So impressive macro! I never see that so close. Very well done, with a great management of light.
Congratulations Francisco for your 2nd anniversary on TN, with so many nice captures of the fantastic insects world you have in Brazil.
Cheers,
Catherine
P.S. Happy Valentine's Day with your wife and family!

  • Great 
  • Heaven Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 996 W: 123 N: 2341] (7912)
  • [2010-02-14 10:28]

Dear Francisco!

Your picture simply is beautiful and impressive. The details are magnificent and I know how much know-how it needs to realize such a picture. But, from my point of view, even more important than the technical aspects is the impact of the picture on the viewer, the emotions it generates. I hardly can image that your picture doesn't strike a chord with the viewer!

Kind regards

Markus

N.B. Congratulations for your anniversary and many thanks for your valuable contributions!

  • Great 
  • nglen Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 2883 W: 30 N: 9683] (36145)
  • [2010-02-14 10:36]

Hi Francisco . Congrats on your 2years on TN. You have chosen a fine macro picture for today. We can see every little detail . All with rich colours. well taken my friend TFS.
Nick..

Hello Francisco,
congratulations on your second anniversary; a super super macro shot of these dragonfly's eyes taken with impressive detail, very beautiful colours, well composed.
TFS
Best regards
Maurizio

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2010-02-14 15:18]

Hi Francisco,this is a incredible pic...the best way to celebrate your 2nd year on TN..incredible sharpness and colors,one of the best surprises never seen on TN..my greats compliments,have a nice week,Luciano

Hello francisco
wow ! what a great shot ! a fantastic close-up for celebrate your second anniversary on TN clear crisp details especially on the facets of his eyes
excellent composition and colors
Have a good night
Jacqueline

Hello Francisco,
Bravo again! is a masterpiece of MACRO! ... a mixture of talent and beautiful art! good job, very impressive. Happy second anniversary in TN!
TFS
Jesús

auguri Francisco per la ricorrenza
ma questo close close close con cosa l'hai fatto?
incredibile dettaglio della texture degli occhi
grazie ciao sERGIO

  • Great 
  • gondox Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 356 W: 65 N: 342] (1585)
  • [2010-02-15 16:12]

Hi Francisco!

I have once found a dead one too but didn't carry, took a shot in place, but next time I'll think about taking it out at least to a sunny spot.. I think it's totally OK to study it and take a picture like this - it is amazing how perfect the hexal pattern of the eyes are - and you really did a perfect job on showing us with depth and so many details in them! Really nice work, TFS!

Best regards,
Andor

Hi Francisco.

This is super close macro. Those compound eyes really pop and I have never seen d-fly eyes this close.

Congratulations on your 2nd year. Great work and contributions to TN.

TFS and best regards,
Jusni

  • Great 
  • Adanac Gold Star Critiquer/Gold Note Writer [C: 1273 W: 1 N: 6188] (21378)
  • [2010-02-16 18:53]

Hello Francisco,
Congratulations on your second anniversary and what a splendid way to celebrate an amazing macro image. Thank you for sharing.
Rick

Hi dear Francisco ,
What a great shot.
It is wonderful macro.
Excellent details and vivid colours.

Very well done

TFS

Kind regards
Saeed

  • Great 
  • uleko Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3396 W: 172 N: 3310] (10940)
  • [2010-02-17 12:03]
  • [+]

Hello Francisco,
Congratulations on reaching this milestone and also on this fantastic macro shot! Amazing composition and superb details and colours. An interesting note too!
Many thanks and cheers, Ulla

Hello Francisco,
congratulations on your 2nd anniversary on TN. I wish you many great shots for a long time. excellent macro-shot of eyes and great selection to celebrate. sharp details, colors and composition amazing beautiful. Thanks for sahring. best wishes.
Ahmet

Calibration Check
















0123456789ABCDEF