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corbex
post 3 Nov 2011, 16:35
Post #121


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Nasol! Nu suporta piinea.


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G I M
post 3 Nov 2011, 16:53
Post #122


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Eu mi-as pune una dasta smile.gif


This post has been edited by G I M: 3 Nov 2011, 16:54


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Liviu
post 3 Nov 2011, 17:12
Post #123


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Lucrez acum la o lampa de 1800 lumeni smile.gif ... 900 pe faza scurta si 900 pe lunga. Am sa pun poze imediat ce e gata tongue.gif ....


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VladG
post 3 Nov 2011, 17:32
Post #124


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Laser, frate!
O sa le poti aprinde pe amandoua simultan? biggrin.gif


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Liviu
post 3 Nov 2011, 17:37
Post #125


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Da .. asta e scopul.


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corbex
post 3 Nov 2011, 19:14
Post #126


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Baterie de 66 Ah?
La citi w si citi v a ajuns un led din asta?

This post has been edited by corbex: 3 Nov 2011, 19:25


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vis-a-vis
post 3 Nov 2011, 19:53
Post #127


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QUOTE(Liviu @ 3 Nov 2011, 18:12)
Am sa pun poze imediat ce e gata tongue.gif ....
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Hai frate, ca mi s-a albit barba... tongue.gif


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Tamango
post 3 Nov 2011, 19:55
Post #128


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Da visule, si eu astept pozele de la nenea Liviu ... banuiesc ca iar o sa ma apuc sa caut dracovenii cu multi lumeni de cumparat pe net ...


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feroviarul
post 4 Nov 2011, 22:53
Post #129


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ce spuneti de asta?
&feature=related

5 Nov 2011, 00:01:
spuneti-mi si mie,e buna de ceva chestia asta?http://www.okazii.ro/catalog/57397319/lanterna-lampa-de-cap-cu-led-smd-high-power-200m-clar.html

This post has been edited by feroviarul: 4 Nov 2011, 23:01


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Liviu
post 5 Nov 2011, 21:34
Post #130


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Ok .. timpul pentru niste poze.

Deci .. farul inca nu e gata asa ca nu va asteptati la finisaje smile.gif.
Am reusit totusi sa il pun intr-o forma functionala si sa fac un set de poze in seara asta.

Despre setup:
Led-uri Cree XM-L (6000K, 900 lumeni/10W, single chip).
Focalizare faza lunga: optica din polimer, proiectie cu deschidere conica de 10 grade.
Focalizare faza scurta: Lupa din polimer cu striatii verticale, deschidere orizontala ~80 de grade, verticala ~20 de grade.

Regulator de curent de 3A cu modulare PWM, cu intensitatea curentului de iesire controlabila printr-un pin dedicat (pe care se injecteaza un semnal dreptunghiular de ~60-80Hz, cu factor de umplere variabil => stralucire reglabila a led-ului).

Baterii: 4x Li-Ion 18650, 2400mAh, legate 2S2P -> 8.4V/4800mAh. Asta s-ar traduce in genere in autonomie de cca 4ore cu o singura faza aprinsa in putere maxima sau de 2 ore cu ambele faze aprinse in putere maxima.

Tufele/copaceii din imagini sunt la ~40 de metri de bicicleta.

Reamintesc setarile aparatului foto pentru capturarea unei imagini apropiate de ceea ce se vede cu ochiul liber: ISO100, WB-daylight, F4.0, EXP: 6 sec.

Enjoy.

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vis-a-vis
post 5 Nov 2011, 21:40
Post #131


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Ai parjolit iarba, sa-nnebunesc! radmasa.gif


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khrysty@n
post 5 Nov 2011, 21:47
Post #132


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Finaly, asta e al meu !!!!!!!!

Traiasca Liviu !!!!!

Acum incep sa inteleg proverbul ala: "I am not afraid of the night, Night is afraid of me !!!" radmasa.gif


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vis-a-vis
post 5 Nov 2011, 21:53
Post #133


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Liviule, da-mi-l mie, iti dau mai mult ca nenea cristian radmasa.gif


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khrysty@n
post 5 Nov 2011, 21:54
Post #134


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"N'as prea's crede" =))

Asta e facut sa fie trimis in Arad smile.gif)


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corbex
post 5 Nov 2011, 22:16
Post #135


Desi nu pare, ma plimb cu Dacia


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De masina nu faci?


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Liviu
post 5 Nov 2011, 22:46
Post #136


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smile.gif .... si cine mi le omologheaza?


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corbex
post 5 Nov 2011, 23:01
Post #137


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Cine beleste ochii-n farurile omului? Cine omologheaza si xenoanele chinezesti. icon_mrgreen.gif


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zodrac
post 6 Nov 2011, 07:36
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ce la comutatoare are ...


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Tamango
post 6 Nov 2011, 12:39
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Nenea Liviu, jos palaria ! Vorba visului, ai parjolit iarba cu dracia aia up.gif


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khrysty@n
post 6 Nov 2011, 14:07
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Vine RAR-ul dupa mine cand ma vede pe strada...

Or zice ca si-o tras unu pe masina proiectoare de jeep ! icon_mrgreen.gif radmasa.gif


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khrysty@n
post 10 Nov 2011, 19:59
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Cel mai tare far... biggrin.gif

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Markos
post 10 Nov 2011, 22:48
Post #142


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Zici ca-i farul din Constanta tongue.gif


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khrysty@n
post 10 Nov 2011, 23:38
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1800lm, nu sunt gluma oricum...

Unele masini din RO, nu au asa faruri cum am eu la bicla acuma.


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yhattori
post 11 Nov 2011, 13:01
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QUOTE(Liviu @ 5 Nov 2011, 21:34)
Reamintesc setarile aparatului foto pentru capturarea unei imagini apropiate de ceea ce se vede cu ochiul liber: ISO100, WB-daylight, F4.0, EXP: 6 sec.

*



un ochi adaptat la intuneric integreaza cam 15 secunde si percepe stele pina la magnitudinea aparenta 6. asta echivaleaza cu un iso de aprox 400, valoarea e derivata prin formule intr-o lucrare a marinei americane de prin '46.

apertura unei pupile complet deschise e in jur de f/3.

problema e ca gama dinamica a ochiului uman adaptat la intuneric e de aprox. 10^6, de aceea o expunere de 15 secunde, f/3, iso 400 va rezulta intr-o poza puternic supraexpusa.

10^6 ~ 2^20 deci ai avea de acoperit 20 de trepte de expunere, pentru o camera digitala care scoate jpeg-uri (8-9 biti gama dinamica) trebuie sa faci mai multe expuneri pe care sa le combini prin ceva tehnica HDR pentru a aproxima ce vede ochiul uman.

de ex iso 400, f/4 si expunere 16s, 1/2 si 1/100.

This post has been edited by yhattori: 11 Nov 2011, 16:50


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Serpico
post 11 Nov 2011, 13:49
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Cred ca folosirea unor anumite setari (mereu aceleasi) urmareste mai degraba stabilirea unui standard care sa permita comparatii directe intre diverse surse de lumina pe baza fotografiilor si nu o imagine realista a modului in care percepe ochiul uman sursa respectiva de lumina.


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T.rac3Er
post 11 Nov 2011, 16:39
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nu se deschid toate pozele


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Liviu
post 12 Nov 2011, 00:05
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QUOTE(yhattori @ 11 Nov 2011, 13:01)
un ochi adaptat la intuneric integreaza cam 15 secunde si percepe stele pina la magnitudinea aparenta 6. asta echivaleaza cu un iso de aprox 400, valoarea e derivata prin formule intr-o lucrare a marinei americane de prin '46.

apertura unei pupile complet deschise e in jur de f/3.

problema e ca gama dinamica a ochiului uman adaptat la intuneric e de aprox. 10^6, de aceea o expunere de 15 secunde, f/3, iso 400 va rezulta intr-o poza puternic supraexpusa.

10^6 ~ 2^20 deci ai avea de acoperit 20 de trepte de expunere, pentru o camera digitala care scoate jpeg-uri (8-9 biti gama dinamica) trebuie sa faci mai multe expuneri pe care sa le combini prin ceva tehnica HDR pentru a aproxima ce vede ochiul uman.

de ex iso 400, f/4 si expunere 16s, 1/2 si 1/100.
*




QUOTE(Serpico @ 11 Nov 2011, 13:49)
Cred ca folosirea unor anumite setari (mereu aceleasi) urmareste mai degraba stabilirea unui standard care sa permita comparatii directe intre diverse surse de lumina pe baza fotografiilor si nu o imagine realista a modului in care percepe ochiul uman sursa respectiva de lumina.
*




Setarile respective sunt luate de pe http://www.candlepowerforums.com/vb/ unde baieti care se pricep mult mai bine ca mine la capturat genul asta de lumina au stabilit standardele astea.
Tinand cont de ce vad eu in poze si ce vad cu ochiul liber, le dau dreptate 100% .. chiar iese in fotografii efectul real pe care il percep eu cu ochii.


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khrysty@n
post 14 Nov 2011, 16:02
Post #148


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Finisaje: tongue.gif

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IMG_7004.JPG ( Size: 2.36mb ) Number of downloads: 184


Cu noile... "imbunatatiri", farul are acum si vizibilitate laterala buna.


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feroviarul
post 27 Dec 2011, 10:04
Post #149


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spuneti-mi si mie de ce astea http://www.ebay.com/sch/i.html?_nkw=2400+l...6.c0.m270.l1313 sunt mai ieftine fata de astea http://www.ebay.com/sch/i.html?_from=R40&_...736&_nkw=mj+816 mj816


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Tamango
post 29 Dec 2011, 10:18
Post #150


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Una e facuta in China, cealalta in UK. Ghici ciuperca de ce ...


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