{"id":36987,"date":"2020-09-18T15:35:07","date_gmt":"2020-09-18T13:35:07","guid":{"rendered":"https:\/\/www.fotolab.cz\/blog\/?p=36987"},"modified":"2024-08-22T11:07:12","modified_gmt":"2024-08-22T09:07:12","slug":"jak-vybrat-externi-blesk-pro-fotoaparat","status":"publish","type":"post","link":"https:\/\/www.fotolab.cz\/blog\/jak-vybrat-externi-blesk-pro-fotoaparat\/","title":{"rendered":"Jak vybrat extern\u00ed blesk pro fotoapar\u00e1t"},"content":{"rendered":"

Fotografov\u00e1n\u00ed s\u00a0bleskem nen\u00ed zcela jednoduchou \u010dinnost\u00ed, pokud m\u00e1 fotografie vypadat spr\u00e1vn\u011b, tedy tak, \u017ee div\u00e1k nepozn\u00e1 pou\u017eit\u00ed blesku. P\u0159i tro\u0161e snahy toho ale dos\u00e1hnete a v\u00fdsledky mohou b\u00fdt p\u0159ekvapiv\u011b dobr\u00e9.<\/strong><\/p>\n

Hned na za\u010d\u00e1tku se slu\u0161\u00ed \u0159\u00edct, \u017ee nen\u00ed blesk jako blesk. Asi nejv\u011bt\u0161\u00ed rozd\u00edl najdete mezi blesky intern\u00edmi a blesky extern\u00edmi<\/a><\/strong>. Ty zabudovan\u00e9 do t\u011bla<\/strong> fotoapar\u00e1tu toti\u017e maj\u00ed jednu zcela z\u00e1sadn\u00ed nev\u00fdhodu, a tou je nemo\u017enost sm\u011brov\u00e1n\u00ed z\u00e1blesku<\/strong>, na druhou stranu je jejich p\u0159\u00edtomnost ve fotoapar\u00e1tu pro mnoho za\u010d\u00ednaj\u00edc\u00edch fotograf\u016f p\u0159\u00edle\u017eitost\u00ed pro vyzkou\u0161en\u00ed pr\u00e1ce s\u00a0bleskem a m\u016f\u017eete jej tak\u00e9 pou\u017e\u00edt k\u00a0odp\u00e1len\u00ed blesku extern\u00edho<\/strong>.<\/p>\n

Z v\u00fd\u0161e uveden\u00e9ho pak v\u00edcem\u00e9n\u011b vypl\u00fdv\u00e1 v\u00fdhoda blesk\u016f extern\u00edch<\/strong>, kterou je d\u00edky polohovateln\u00e9 hlav\u011b mo\u017enost sm\u011brov\u00e1n\u00ed z\u00e1blesku<\/strong> podle na\u0161ich p\u0159edstav. Ruku v ruce s t\u00edm jde tak\u00e9 podstatn\u011b vy\u0161\u0161\u00ed v\u00fdkon<\/strong> extern\u00edch blesk\u016f. Ten se ud\u00e1v\u00e1 pomoc\u00ed sm\u011brn\u00e9ho \u010d\u00edsla (GN) u intern\u00edch blesk\u016f dosahuje cca 13 GN, u extern\u00edch pak v\u00fdkon za\u010d\u00edn\u00e1 n\u011bkde kolem GN 20 a kon\u010d\u00ed n\u011bkde u GN 80 v p\u0159\u00edpad\u011b v\u00fdkonn\u00fdch syst\u00e9mov\u00fdch blesk\u016f. A jak\u00e1 je nev\u00fdhoda extern\u00edho blesku<\/strong>? Teoreticky \u017e\u00e1dn\u00e1, z \u010dist\u011b praktick\u00e9ho hlediska je to hmotnost<\/strong>, kter\u00e1 se prom\u00edtne do hmotnosti cel\u00e9 sestavy s apar\u00e1tem a tak\u00e9 nutnost m\u00edt alespo\u0148 dv\u011b sady bateri\u00ed pro pou\u017e\u00edv\u00e1n\u00ed blesku.<\/p>\n

Kdy fotit s\u00a0bleskem<\/h2>\n

Odpov\u011b\u010f na tuto ot\u00e1zku je velmi prost\u00e1, v\u017edy, kdy\u017e pot\u0159ebujete dostat do sc\u00e9ny sv\u011btlo a jin\u00fdm zp\u016fsobem to nen\u00ed mo\u017en\u00e9<\/strong>, ani\u017e by fotografie pozbyla va\u0161eho z\u00e1m\u011bru. Nej\u010dast\u011bji se bez blesku neobejdete p\u0159i ateli\u00e9rov\u00e9m focen\u00ed, v\u00a0portr\u00e9tn\u00ed a svatebn\u00ed fotografii<\/strong> jej tak\u00e9 vyu\u017eijete \u010dasto. V\u00a0p\u0159\u00edpad\u011b sportu bude blesk u\u017eite\u010dn\u00fdm pomocn\u00edkem zejm\u00e9na ve sportovn\u00edch hal\u00e1ch a samoz\u0159ejm\u011b tak\u00e9 spole\u010densk\u00e1 fotografie a dokument.<\/p>\n

V\u00a0ka\u017ed\u00e9m ze zm\u00edn\u011bn\u00fdch \u017e\u00e1nr\u016f bude hr\u00e1t z\u00e1bleskov\u00e9 osv\u011btlen\u00ed trochu jinou roli, v\u011bt\u0161inou v\u00e1s k\u00a0jeho pou\u017eit\u00ed donut\u00ed pot\u0159eba vyu\u017e\u00edt specifick\u00e9 expozice \u2013 nap\u0159\u00edklad vy\u0161\u0161\u00ed clonov\u00e9 \u010d\u00edslo za n\u00edzk\u00e9ho osv\u011btlen\u00ed kv\u016fli zv\u011bt\u0161en\u00ed hloubky ostrosti \u2013 kter\u00e9 nen\u00ed mo\u017en\u00e9 jin\u00fdm zp\u016fsobem dos\u00e1hnout.<\/p>\n

Alternativou m\u016f\u017ee b\u00fdt samoz\u0159ejm\u011b st\u00e1l\u00e9 osv\u011btlen\u00ed<\/strong>, kter\u00e9 je dnes ji\u017e na velmi vysok\u00e9 \u00farovni a koup\u00edte LED panel velmi kompaktn\u00edch rozm\u011br\u016f s\u00a0mo\u017enost\u00ed zm\u011bny nejen intenzity osv\u011btlen\u00ed, ale tak\u00e9 barevn\u00e9 teploty, a to v\u0161e je\u0161t\u011b nap\u00e1jen\u00e9 bateri\u00ed.<\/p>\n

\"interni_externi_LED\"<\/p>\n

Sv\u011btlo pro st\u00e1l\u00e9 sv\u00edcen\u00ed je v\u0161ak dom\u00e9nou zejm\u00e9na p\u0159i z\u00e1znamu videa<\/strong>, kde d\u00e1v\u00e1 st\u00e1l\u00e9 osv\u011btlen\u00ed mnohem v\u011bt\u0161\u00ed smysl. V\u00a0p\u0159\u00edpad\u011b fotografov\u00e1n\u00ed snad m\u016f\u017ee b\u00fdt pou\u017eit jen siln\u00fd reflektor, nam\u00ed\u0159en\u00fd do stropu, kter\u00fd tak vytvo\u0159\u00ed ambientn\u00ed osv\u011btlen\u00ed.<\/p>\n

Odrazem nebo p\u0159es difuz\u00e9r<\/h2>\n

A\u010dkoli nab\u00eddne extern\u00ed blesk vy\u0161\u0161\u00ed v\u00fdkon, neznamen\u00e1 to, \u017ee bychom jeho sv\u011btlem m\u011bli oslepit fotografovan\u00e9 osoby. Vy\u0161\u0161\u00ed v\u00fdkon je zde dostupn\u00fd pr\u00e1v\u011b proto, aby bylo mo\u017en\u00e9 vytvo\u0159it na kr\u00e1tk\u00fd okam\u017eik dostate\u010dn\u00e9 ambientn\u00ed nebo nep\u0159\u00edm\u00e9 osv\u011btlen\u00ed fotografovan\u00e9 sc\u00e9ny<\/strong>.<\/p>\n

Nato\u010den\u00ed blesku sm\u011brem ke stropu<\/strong>, od n\u011bho\u017e se z\u00e1blesk sv\u011btla odraz\u00ed a rozpt\u00fdl\u00ed, m\u00e1 za n\u00e1sledek m\u011bkk\u00e9 osv\u011btlen\u00ed bez ostr\u00fdch st\u00edn\u016f, kter\u00e9 je mnohem p\u0159\u00edjemn\u011bj\u0161\u00ed a p\u0159irozen\u011bj\u0161\u00ed jak intenzitou, tak sm\u011b\u0159ov\u00e1n\u00edm shora dol\u016f, podobn\u011b jako sv\u00edt\u00ed slunce.<\/p>\n

\"nebojte_se_tmy_odraz_blesku\"
Mo\u017enost nato\u010den\u00ed reflektoru a odraz sv\u011btla od stropu, nebo st\u011bny pom\u016f\u017ee k p\u0159irozen\u011bj\u0161\u00edmu vzhledu fotografi\u00ed, bez ostr\u00fdch st\u00edn\u016f.<\/figcaption><\/figure>\n

Ocitnete-li se v\u00a0situaci, kdy nen\u00ed mo\u017en\u00e9 fotografovat s\u00a0odrazem o strop, nezb\u00fdv\u00e1 ne\u017e nam\u00ed\u0159it blesk sm\u011brem k\u00a0fotografovan\u00fdm objekt\u016fm, ov\u0161em v\u017edy s\u00a0dopln\u011bn\u00edm o mal\u00fd difuz\u00e9r nebo v\u011bt\u0161\u00ed softbox<\/strong>. D\u00edky nim toti\u017e dos\u00e1hneme rozpt\u00fdlen\u00e9ho osv\u011btlen\u00ed, kter\u00e9 je mnohem p\u0159irozen\u011bj\u0161\u00ed, zvl\u00e1\u0161t\u011b kdy\u017e se to nep\u0159eh\u00e1n\u00ed s\u00a0v\u00fdkonem z\u00e1blesku.<\/p>\n

\n
\n
\"flash_head\"<\/a>
Mo\u017enosti polohov\u00e1n\u00ed reflektoru a vestav\u011bn\u00e1 odrazn\u00e1 desti\u010dka blesku Metz.<\/figcaption><\/figure>\n<\/div>\n
\n
\"\"<\/a>
Difuz\u00e9r pro extern\u00ed blesk b\u00fdv\u00e1 obvykle sou\u010d\u00e1st\u00ed p\u0159\u00edslu\u0161enstv\u00ed.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n

M\u00e9n\u011b pou\u017e\u00edvan\u00fdm ale praktick\u00fdm \u0159e\u0161en\u00edm je tak\u00e9 kombinace blesku a odrazn\u00e9 desky<\/a><\/strong>, kdy je obvykle blesk um\u00edst\u011bn mimo fotoapar\u00e1t a odrazn\u00e1 deska pak sm\u011b\u0159uje jeho sv\u011btlo, kam je t\u0159eba. V\u00a0p\u0159\u00edpad\u011b fotografov\u00e1n\u00ed v\u00a0exteri\u00e9ru m\u016f\u017ee dokonce odrazn\u00e1 deska v\u00a0n\u011bkter\u00fdch situac\u00edch nahradit i samotn\u00fd blesk<\/strong>.<\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n

Jak vybrat blesk<\/h2>\n

I kdy\u017e je to m\u00e9n\u011b \u010dast\u00e9, st\u00e1le je\u0161t\u011b se m\u016f\u017eete setkat s\u00a0univerz\u00e1ln\u00edmi blesky, kter\u00e9 maj\u00ed pouze jeden st\u0159edov\u00fd kontakt<\/strong>, kter\u00fd slou\u017e\u00ed k odp\u00e1len\u00ed blesku nez\u00e1visle na zna\u010dce fotoapar\u00e1tu. P\u0159i pr\u00e1ci s takov\u00fdm bleskem je t\u0159eba m\u00edt neust\u00e1le kontrolu nad jeho nastaven\u00edm a prom\u00edtnout do n\u011bj vlastn\u00ed nastaven\u00ed fotoapar\u00e1tu, co\u017e b\u00fdv\u00e1 mnohdy pom\u011brn\u011b zdlouhav\u00e9. Nev\u00fdhodou<\/strong> takov\u00e9ho blesku je tedy nutnost pln\u011b manu\u00e1ln\u00edho ovl\u00e1d\u00e1n\u00ed<\/strong> a tak\u00e9 pevn\u00fd a pom\u011brn\u011b dlouh\u00fd synchroniza\u010dn\u00ed \u010das kolem 1\/200 s.<\/p>\n

Efektivn\u011bj\u0161\u00ed cestou je TTL blesk<\/strong>, kter\u00fd se vyb\u00edr\u00e1 podle zna\u010dky fotoapar\u00e1tu a m\u00e1 v\u00edcero kontakt\u016f na patici \u2013 d\u00edky tomu je schopen komunikovat s\u00a0fotoapar\u00e1tem a sv\u00e9 nastaven\u00ed p\u0159izp\u016fsob\u00ed pr\u00e1v\u011b zvolen\u00fdm expozi\u010dn\u00edm hodnot\u00e1m<\/strong>. Stejn\u011b se blesk p\u0159izp\u016fsobuje i zvolen\u00e9mu ohnisku, pokud m\u00e1 zoomovac\u00ed hlavu<\/strong> \u2013 ur\u010dit\u011b doporu\u010duji vyb\u00edrat mezi t\u011bmito typy.<\/p>\n

\"\"<\/a>
Kdy\u017e je sv\u011btla velmi m\u00e1lo anebo pot\u0159ebujete posv\u00edtit proti opravdu ostr\u00e9mu slunci, bude se hodit vysok\u00fd v\u00fdkon \u2013 model Nissin MG10<\/strong> nab\u00eddne GN 80, m\u016f\u017ee tak snadno poslou\u017eit i jako alternativa studiov\u00fdch z\u00e1blesk\u016f.<\/figcaption><\/figure>\n
\n

\u010ct\u011bte tak\u00e9 na blogu: 5 tip\u016f pro focen\u00ed ve \u0161patn\u00e9m sv\u011btle<\/a><\/h4>\n<\/blockquote>\n

A podle \u010deho vyb\u00edrat? Jednozna\u010dn\u011b podle v\u00fdkonu, kdy plat\u00ed jednoduch\u00e1 \u00fam\u011bry vy\u0161\u0161\u00ed = lep\u0161\u00ed. Obecn\u011b lze doporu\u010dit sm\u011brn\u00e9 \u010d\u00edslo mezi GN 55 a 60<\/strong> v p\u0159\u00edpad\u011b, \u017ee hodl\u00e1te fotografovat v p\u0159\u00edm\u00e9m proti slunci. Ni\u017e\u0161\u00ed v\u00fdkon je vhodn\u00fd sp\u00ed\u0161e do interi\u00e9ru nebo prosv\u011btlen\u00ed sc\u00e9ny u produktov\u00e9 fotky<\/strong>. Druh\u00fdm parametrem je pak rozsah zoomovac\u00ed hlavy blesku<\/strong>, ten obvykle b\u00fdv\u00e1 mezi 24 a 105 mm, co\u017e je v\u011bt\u0161inou dostate\u010dn\u00e9, pokud byste v\u0161ak cht\u011bli fotit s\u00a0del\u0161\u00edmi ohnisky kolem 200 mm, je t\u0159eba tomu uzp\u016fsobit i v\u00fdb\u011br blesku.<\/p>\n

\"\"<\/a>
Nikon SB-700<\/a> <\/strong>je typick\u00fd z\u00e1stupce syst\u00e9mov\u00fdch blesk\u016f \u2013 maxim\u00e1ln\u00ed sm\u011brn\u00e9 \u010d\u00edslo 38 dopl\u0148uje mo\u017enost zoomov\u00e1n\u00ed hlavy blesku v rozsahu 24\u2013120 mm<\/figcaption><\/figure>\n

V\u00a0neposledn\u00ed \u0159ad\u011b tak\u00e9 bude z\u00e1le\u017eet na tom, jak chcete blesk odpalovat, pokud nebude nasazen v\u00a0s\u00e1\u0148k\u00e1ch na digit\u00e1lu<\/strong> \u2013 u n\u011bkter\u00fdch fotoapar\u00e1t\u016f je to mo\u017en\u00e9 pomoc\u00ed vestav\u011bn\u00e9ho vzd\u00e1len\u00e9ho ovl\u00e1d\u00e1n\u00ed blesku. Dal\u0161\u00ed mo\u017enost\u00ed je odp\u00e1len\u00ed pomoc\u00ed intern\u00edho blesku, jeho\u017e z\u00e1blesk detekuje optick\u00fd senzor blesku extern\u00edho \u2013 nev\u00fdhodou je, \u017ee tento mus\u00ed \u201evid\u011bt\u201c na z\u00e1blesk intern\u00edho blesku.<\/p>\n

\"\"<\/a>
Canon Speedlite 470EX-AI<\/strong><\/a> nab\u00edz\u00ed unik\u00e1tn\u00ed konstrukci s automaticky se ot\u00e1\u010dej\u00edc\u00ed hlavou pro zaji\u0161t\u011bn\u00ed ide\u00e1ln\u00edho osv\u011btlen\u00ed \u2013 um\u011bl\u00e1 inteligence v tomto sm\u011bru pracuje velmi dob\u0159e a m\u016f\u017ee zna\u010dn\u011b zefektivnit fotografov\u00e1n\u00ed.<\/figcaption><\/figure>\n

Zdaleka nejlep\u0161\u00edm a nejuniverz\u00e1ln\u011bj\u0161\u00edm \u0159e\u0161en\u00edm je pou\u017eit\u00ed samostatn\u00e9ho bezdr\u00e1tov\u00e9ho odpalova\u010de<\/strong>, kter\u00fd je velmi spolehliv\u00fd i na del\u0161\u00ed vzd\u00e1lenost a v p\u0159\u00edpad\u011b pot\u0159eby v\u00e1m umo\u017en\u00ed i \u0159\u00edzen\u00ed odpalu v\u00edce extern\u00edch blesk\u016f sou\u010dasn\u011b<\/strong>. Z hlediska zna\u010dky ur\u010dit\u011b doporu\u010dujeme dr\u017eet se stejn\u00e9ho v\u00fdrobce, jako u va\u0161eho fotoapar\u00e1tu, pokud m\u00e1te men\u0161\u00ed rozpo\u010det pro po\u0159\u00edzen\u00ed blesku, pak neud\u011bl\u00e1te chybu, kdy\u017e s\u00e1hnete po blesc\u00edch Metz anebo Nissin.<\/p>\n

Opravdu je intern\u00ed blesk k\u00a0ni\u010demu?<\/h2>\n

Ur\u010dit\u011b nen\u00ed, jen je pot\u0159eba um\u011bt s\u00a0n\u00edm pracovat<\/strong>. I kdy\u017e je mal\u00fd, m\u00e1 n\u00edzk\u00fd v\u00fdkon a jeho sv\u011btlo je velmi bl\u00edzko objektivu, nav\u00edc v\u00a0jeho ose, ur\u010dit\u011b jej m\u016f\u017eete pou\u017e\u00edvat. Velmi \u010dast\u00e9 je jeho u\u017eit\u00ed v\u00a0okam\u017eiku, kdy fot\u00edte nap\u0159\u00edklad portr\u00e9t v\u00a0protisv\u011btle<\/strong> a pot\u0159ebujete osv\u00edtit tv\u00e1\u0159 portr\u00e9tovan\u00e9ho \u2013 v\u00a0takov\u00e9m p\u0159\u00edpad\u011b posta\u010d\u00ed bohat\u011b intern\u00ed blesk, av\u0161ak mus\u00edte u n\u011bj jednak sn\u00ed\u017eit v\u00fdkon a v\u00a0ide\u00e1ln\u00edm p\u0159\u00edpad\u011b pou\u017e\u00edt i difuz\u00e9r<\/strong>.<\/p>\n

\"\"<\/a><\/p>\n

Ten m\u016f\u017ee b\u00fdt bu\u010fto mal\u00fd, nasazovac\u00ed do bleskov\u00fdch s\u00e1n\u011bk, anebo m\u016f\u017eete vyu\u017e\u00edt de facto jak\u00fdkoli materi\u00e1l, kter\u00fd emitovan\u00e9 sv\u011btlo rozpt\u00fdl\u00ed a zm\u011bk\u010d\u00ed \u2013 typicky nap\u0159\u00edklad pe\u010d\u00edc\u00ed pap\u00edr, matn\u00e1 eurofolie nebo netkan\u00e1 textilie \u2013 v t\u011bchto p\u0159\u00edpadech ale po\u010d\u00edtejte s vy\u0161\u0161\u00edm pohlcov\u00e1n\u00edm sv\u011btla, a tud\u00ed\u017e nutnost\u00ed naopak v\u00fdkon zv\u00fd\u0161it.<\/p>\n

ZOBRAZIT NAB\u00cdDKU EXTERN\u00cdCH BLESK\u016e<\/strong><\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Fotografov\u00e1n\u00ed s\u00a0bleskem nen\u00ed zcela jednoduchou \u010dinnost\u00ed, pokud m\u00e1 fotografie vypadat spr\u00e1vn\u011b, tedy tak, \u017ee div\u00e1k nepozn\u00e1 pou\u017eit\u00ed blesku. P\u0159i tro\u0161e snahy toho ale dos\u00e1hnete a v\u00fdsledky mohou b\u00fdt p\u0159ekvapiv\u011b dobr\u00e9.<\/p>\n","protected":false},"author":256,"featured_media":2014,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[559,18],"tags":[39,946,1729,535,1728],"class_list":["post-36987","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fotolab-fotoradce","category-novinky","tag-blesky","tag-fotoradce","tag-osvetleni","tag-prislusenstvi","tag-ttl"],"wppr_data":{"cwp_meta_box_check":"No"},"_links":{"self":[{"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/posts\/36987"}],"collection":[{"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/users\/256"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/comments?post=36987"}],"version-history":[{"count":10,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/posts\/36987\/revisions"}],"predecessor-version":[{"id":53578,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/posts\/36987\/revisions\/53578"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/media\/2014"}],"wp:attachment":[{"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/media?parent=36987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/categories?post=36987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fotolab.cz\/blog\/wp-json\/wp\/v2\/tags?post=36987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}