{"id":401,"date":"2010-07-26T16:13:33","date_gmt":"2010-07-26T19:13:33","guid":{"rendered":"http:\/\/www.albertoclaveriafoto.com.ar\/blog\/?p=401"},"modified":"2010-07-26T16:13:33","modified_gmt":"2010-07-26T19:13:33","slug":"objetivos-luminosos-o-estabilizados","status":"publish","type":"post","link":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/?p=401","title":{"rendered":"Objetivos luminosos o estabilizados?"},"content":{"rendered":"

Hay mucha discusiones en los foros respecto de este tema pero a ciencia cierta tenemos 3 premisas concretas:<\/p>\n

 <\/p>\n

a) La disyuntiva entre objetivos luminosos y objetivos estabilizados es falsa. Ambos tipos responden a necesidades diferentes.
b) Es una propuesta demasiado general que ser\u00eda necesario concretar para ciertas longitudes focales.
c) Existen objetivos luminosos y estabilizados.
Para empezar por alg\u00fan sitio, ser\u00eda \u00fatil conocer que un objetivo se considera luminoso si su apertura de diafragma m\u00e1xima es de f2.8 o mayor (N\u00famero f m\u00e1s peque\u00f1o). <\/p>\n

En realidad la principal virtud de un objetivo luminoso es que permite profundidades de campo muy peque\u00f1as. Es cierto que, por ejemplo, en  interiores es posible realizar fotograf\u00edas a pulso si elevamos adecuadamente el valor de la sensibilidad ISO. Pero, tambi\u00e9n es cierto, que si deseamos obtener una cierta profundidad de campo, deberemos de cerrar el diafragma hasta, como m\u00ednimo, f8 y en estas condiciones su apertura m\u00e1xima no supondr\u00e1 ninguna ventaja.<\/p>\n

\"Canon<\/a> Por otro lado, un objetivo estabilizado lo que permite es realizar tomas razonablemente n\u00edtidas a pulso. En concreto permite utilizar velocidades de obturaci\u00f3n entre 3 y 4 pasos m\u00e1s lentas de lo que ser\u00eda aconsejable dada la longitud focal utilizada (Se considera que para una longitud focal equivalente de f, la velocidad de obturaci\u00f3n, medida en segundos, deber ser al menos tan r\u00e1pida como 1\/f segundos.). Es decir. su utilidad es la de conseguir fotograf\u00edas n\u00edtidas usando la c\u00e1mara a pulso. Si utilizamos un tr\u00edpode la estabilizaci\u00f3n no nos servir\u00e1 absolutamente para nada (De hecho se recomienda desactivarla en estas circunstancias).
Por ello, a la hora de adquirir un tipo u otro de objetivo, debemos de ser plenamente conscientes de para qu\u00e9 lo necesitamos y darnos cuenta de que sirven a prop\u00f3sitos diferentes. Su elecci\u00f3n depender\u00e1 de cu\u00e1les sean nuestras necesidades.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hay mucha discusiones en los foros respecto de este tema pero a ciencia cierta tenemos 3 premisas concretas:   a) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[60],"tags":[34,265,19,487],"class_list":["post-401","post","type-post","status-publish","format-standard","hentry","category-objetivos","tag-estabilizador","tag-is","tag-numero-f","tag-objetivos"],"_links":{"self":[{"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=\/wp\/v2\/posts\/401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=401"}],"version-history":[{"count":0,"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=\/wp\/v2\/posts\/401\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.albertoclaveriafoto.com.ar\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}