{"id":6475,"date":"2016-01-11T22:18:26","date_gmt":"2016-01-11T21:18:26","guid":{"rendered":"https:\/\/tipyjakfotit.cz\/?p=6475"},"modified":"2016-01-11T22:28:42","modified_gmt":"2016-01-11T21:28:42","slug":"jak-je-to-s-crop-faktorem","status":"publish","type":"post","link":"https:\/\/tipyjakfotit.cz\/jak-je-to-s-crop-faktorem\/","title":{"rendered":"Jak je to s CROP faktorem?"},"content":{"rendered":"

Pokud ji\u017e n\u011bjakou dobu fotografujete, pro\u010d\u00edt\u00e1te se fotografick\u00fdmi f\u00f3ry, \u010dtete odbornou literaturu, vyb\u00edr\u00e1te nov\u00fd fotoapar\u00e1t nebo jste se jen p\u00e1rkr\u00e1t zaposlouchali do diskuze dvou fotograf\u016f, pravd\u011bpodobn\u011b v\u00e1m neunikl v\u00fdraz crop faktor. V n\u00e1sleduj\u00edc\u00edm \u010dl\u00e1nku bych r\u00e1da shrnula to nejd\u016fle\u017eit\u011bj\u0161\u00ed o crop faktoru a pomohla v\u00e1m tomuto term\u00ednu l\u00e9pe porozum\u011bt. Pokusila jsem se ho napsat zjednodu\u0161en\u011b \u2013 tak, aby se v n\u011bm za\u010d\u00ednaj\u00edc\u00ed fotografov\u00e9 co nejl\u00e9pe orientovali.<\/p>\n

\u00a0<\/h3>\n

Na po\u010d\u00e1tku je KINOFILM<\/h3>\n

Abychom spr\u00e1v\u011b porozum\u011bli term\u00ednu crop faktor, mus\u00edme se vr\u00e1tit ke kinofilm\u016fm, kter\u00e9 v\u0161ichni zn\u00e1me a n\u011bkte\u0159\u00ed i st\u00e1le aktivn\u011b vyu\u017e\u00edv\u00e1me, proto jen v rychlosti \u2013 kinofilmov\u00e9 fotoapar\u00e1ty pou\u017e\u00edvaj\u00ed k \u201ez\u00e1pisu\u201c fotografi\u00ed filmov\u00e9 p\u00e1sky s pol\u00ed\u010dky o velikosti 24 x 36 mm \u2013 tzv. 35mm film.<\/p>\n

 <\/p>\n

S p\u0159\u00edchodem digit\u00e1ln\u00ed technologie nahradil kinofilm senzor neboli sn\u00edma\u010d. Profesion\u00e1ln\u00ed zrcadlovky maj\u00ed sn\u00edma\u010de, kter\u00e9 si zachovaly velikost filmov\u00e9ho pol\u00ed\u010dka – naz\u00fdvaj\u00ed full frame (FF). Rozezn\u00e1te je snadno, a to zpravidla vy\u0161\u0161\u00ed cenou. Pr\u00e1v\u011b kv\u016fli cen\u011b se v\u00fdrobci rozhodli senzor zmen\u0161it.<\/p>\n

 <\/p>\n

A jsme u crop faktoru \u2013 jedn\u00e1 se o rozd\u00edl mezi velikost\u00ed senzoru kinofilmov\u00e9ho pol\u00ed\u010dka (full frame senzoru) a zmen\u0161en\u00fdm sn\u00edma\u010dem. Nap\u0159\u00edklad j\u00e1 pou\u017e\u00edv\u00e1m u\u017e drahn\u011b let zrcadlovku Nikon D40x – velikost jej\u00edho senzoru je 23,7 x 15,6. To znamen\u00e1, \u017ee crop faktor je zde 1,5x (\u00fahlop\u0159\u00ed\u010dka je 1,5x men\u0161\u00ed ne\u017e u kinofilmu).<\/p>\n

 <\/p>\n

\"shutterstock_126251060\"<\/p>\n

\u00a0<\/h3>\n

Senzory a objektivy<\/h3>\n

Velikost senzoru ovliv\u0148uje krom\u011b \u0161umu a kvality fotografie tak\u00e9 objektivy, kter\u00e9 na fotoapar\u00e1t nasad\u00edme. Odnepam\u011bti se za \u201ez\u00e1kladn\u00ed\u201c objektiv, nasazen\u00fd na klasickou kinofilmovou (full frame) zrcadlovku pova\u017euje sklo s ohniskem 50mm, krat\u0161\u00ed ohniska se pak ozna\u010duj\u00ed za \u0161iroko\u00fahl\u00e9 a del\u0161\u00ed za teleobjektivy.<\/p>\n

 <\/p>\n

Nicm\u00e9n\u011b kdy\u017e objektiv s ohniskem 50mm nasad\u00edm na sv\u016fj Nikon D40x, mus\u00edm si logicky vyn\u00e1sobit ohniskovou vzd\u00e1lenost crop faktorem, tzn. v\u00fdsledn\u00e1 ohnisko bude cca 75mm (50*1,5).<\/p>\n

 <\/p>\n

\"Objektiv\"<\/p>\n

\u00a0<\/h3>\n

Orienta\u010dn\u00ed tabulka<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
full frame<\/span><\/td>\n1,3x<\/span><\/td>\n1,5x<\/span><\/td>\n1,6x<\/span><\/td>\n2,0x<\/span><\/td>\n<\/tr>\n
10 mm<\/td>\n13 mm<\/td>\n15 mm<\/td>\n16 mm<\/td>\n20 mm\u00a0<\/td>\n<\/tr>\n
17 mm<\/td>\n22 mm<\/td>\n26 mm<\/td>\n27 mm\u00a0<\/td>\n34 mm<\/td>\n<\/tr>\n
20 mm<\/td>\n26 mm<\/td>\n30 mm<\/td>\n32 mm<\/td>\n40 mm<\/td>\n<\/tr>\n
28 mm\u00a0<\/td>\n36 mm<\/td>\n42 mm\u00a0<\/td>\n45 mm\u00a0<\/td>\n56 mm\u00a0<\/td>\n<\/tr>\n
35 mm\u00a0<\/td>\n46 mm<\/td>\n53 mm\u00a0<\/td>\n56 mm<\/td>\n70 mm\u00a0<\/td>\n<\/tr>\n
50 mm\u00a0<\/td>\n65 mm\u00a0<\/td>\n75 mm\u00a0<\/td>\n80 mm\u00a0<\/td>\n100 mm\u00a0<\/td>\n<\/tr>\n
100 mm\u00a0<\/td>\n130 mm<\/td>\n150 mm\u00a0<\/td>\n160 mm\u00a0<\/td>\n200 mm\u00a0<\/td>\n<\/tr>\n
300 mm\u00a0<\/td>\n390 mm<\/td>\n450 mm<\/td>\n480 mm<\/td>\n600 mm\u00a0<\/td>\n<\/tr>\n
500 mm\u00a0<\/td>\n650 mm<\/td>\n750 mm<\/td>\n800 mm<\/td>\n1000 mm\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Pokud ji\u017e n\u011bjakou dobu fotografujete, pro\u010d\u00edt\u00e1te se fotografick\u00fdmi f\u00f3ry, \u010dtete odbornou literaturu, vyb\u00edr\u00e1te nov\u00fd fotoapar\u00e1t nebo jste se jen p\u00e1rkr\u00e1t zaposlouchali do diskuze dvou fotograf\u016f, pravd\u011bpodobn\u011b v\u00e1m neunikl v\u00fdraz crop faktor. V n\u00e1sleduj\u00edc\u00edm \u010dl\u00e1nku bych r\u00e1da shrnula to nejd\u016fle\u017eit\u011bj\u0161\u00ed o crop faktoru a pomohla v\u00e1m tomuto term\u00ednu l\u00e9pe porozum\u011bt. Pokusila jsem se ho napsat zjednodu\u0161en\u011b […]<\/p>\n","protected":false},"author":2,"featured_media":6516,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,81],"tags":[223,224,225],"_links":{"self":[{"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/posts\/6475"}],"collection":[{"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/comments?post=6475"}],"version-history":[{"count":0,"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/posts\/6475\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/media\/6516"}],"wp:attachment":[{"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/media?parent=6475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/categories?post=6475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tipyjakfotit.cz\/wp-json\/wp\/v2\/tags?post=6475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}