b\u00e0i vi\u1ebft n\u00e0y c\u1ee7a \u0110\u1ea1t Tr\u1ea7n<\/a>, m\u1ed9t b\u1ea1n \u1ea3nh t\u00e2m huy\u1ebft v\u00e0 t\u00e0i n\u0103ng, v\u1ec1 vi\u1ec7c ch\u1ecdn k\u00ednh g\u00f3c r\u1ed9ng h\u01a1n 50mm cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u. Theo tui, \u0111\u00e2y l\u00e0 m\u1ed9t \u00fd ki\u1ebfn kh\u00e1 thuy\u1ebft ph\u1ee5c.<\/p>\n\n\n\nT\u1ea1i sao l\u1ea1i l\u00e0 ti\u00eau c\u1ef1 40mm? C\u00e1c b\u1ea1n \u0111ang t\u1ef1 h\u1ecfi.<\/p>\n\n\n\n
Tr\u01b0\u1edbc h\u1ebft, ta ph\u1ea3i c\u00f4ng nh\u1eadn m\u1ed9t \u0111i\u1ec1u, \u0111\u00e2y l\u00e0 m\u1ed9t ti\u00eau c\u1ef1 k\u00ednh kh\u00e1 l\u1ea1.<\/p>\n\n\n\n
C\u00e1c b\u1ea1n \u1ea3nh, khi c\u1ea7m tr\u00ean tay chi\u1ebfc m\u00e1y \u1ea3nh \u0111\u1ea7u ti\u00ean, \u0111\u1ea1i \u0111a s\u1ed1 \u0111\u1ec1u \u0111\u01b0\u1ee3c g\u1eafn k\u00ednh ti\u00eau c\u1ef1 50mm. Khi mu\u1ed1n l\u1ef1a ch\u1ecdn g\u00f3c nh\u00ecn r\u1ed9ng h\u01a1n, ta t\u00ecm \u0111\u1ebfn c\u00e1c lo\u1ea1i k\u00ednh 35mm, 28mm, 24mm, 20mm, 16mm v\u00e0 c\u00e1c lo\u1ea1i k\u00ednh m\u1eaft c\u00e1. N\u1ebfu c\u1ea7n ch\u1ee5p t\u1eeb xa, ta l\u1ef1a ch\u1ecdn c\u00e1c lo\u1ea1i k\u00ednh 85mm, 100mm, 135mm ho\u1eb7c d\u00e0i h\u01a1n. H\u00e3n h\u1eefu, ta nghe n\u00f3i v\u1ec1 c\u00e1c lo\u1ea1i k\u00ednh ti\u00eau c\u1ef1 45mm, 43mm, 42mm, 40mm ho\u1eb7c 38mm.<\/p>\n\n\n\n
H\u00e3y b\u1ecf qua c\u00e1c ti\u00eau c\u1ef1 45mm, 43mm, 42mm v\u00e0 38mm. 45mm kh\u00f4ng th\u1ef1c s\u1ef1 c\u00f3 nhi\u1ec1u kh\u00e1c bi\u1ec7t so v\u1edbi 50mm. 43mm, 42mm v\u00e0 38mm ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m tr\u00f2n th\u00e0nh 40mm. Nh\u01b0 v\u1eady, c\u00e1c ti\u00eau c\u1ef1 n\u00f3i tr\u00ean th\u1ef1c ra ch\u1ec9 l\u00e0 c\u00e1c bi\u1ebfn thi\u00ean c\u1ee7a ti\u00eau c\u1ef1 50mm v\u00e0 40mm m\u00e0 th\u00f4i: hai m\u1ee9c ti\u00eau c\u1ef1 trung b\u00ecnh, kh\u00f4ng r\u1ed9ng, kh\u00f4ng d\u00e0i. Trong \u0111\u00f3, ti\u00eau c\u1ef1 50mm th\u00ec v\u00f4 c\u00f9ng ph\u1ed5 d\u1ee5ng, c\u00f2n ti\u00eau c\u1ef1 40mm d\u01b0\u1eddng nh\u01b0 kh\u00f4ng \u0111\u01b0\u1ee3c m\u1ea5y ai \u0111\u1ec3 m\u1eaft \u0111\u1ebfn.<\/p>\n\n\n\n
Nh\u01b0 v\u1eady, m\u1ee5c \u0111\u00edch c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y ch\u00ednh l\u00e0 \u0111\u1ec3 gi\u1edbi thi\u1ec7u v\u1ec1 m\u1ed9t ti\u00eau c\u1ef1 k\u00ednh h\u00e3n h\u1eefu v\u00e0 kh\u00f4ng \u0111\u00e1ng b\u1ecb l\u00e3ng qu\u00ean. Ti\u00eau c\u1ef1 k\u00ednh 40mm.<\/p>\n\n\n\n
K\u00ednh ti\u00eau c\u1ef1 40mm c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t so v\u1edbi ti\u00eau c\u1ef1 50mm?<\/p>\n\n\n\n
\u0110i\u1ec3m \u0111\u1ea7u ti\u00ean ph\u1ea3i k\u1ec3 \u0111\u1ebfn v\u1ec1 c\u00e1c k\u00ednh 40mm l\u00e0 k\u00edch c\u1ee1 v\u00f4 c\u00f9ng nh\u1ecf g\u1ecdn. \u0110\u1ea1i \u0111a s\u1ed1 c\u00e1c k\u00ednh si\u00eau m\u1ecfng \u201cpancake\u201d<\/em> c\u00f3 ti\u00eau c\u1ef1 40mm. V\u00e0 t\u1ea5t c\u1ea3 c\u00e1c k\u00ednh ti\u00eau c\u1ef1 40mm \u0111\u1ec1u nh\u1ecf h\u01a1n k\u00ednh ti\u00eau c\u1ef1 50mm c\u1ee7a c\u00f9ng m\u1ed9t h\u00e3ng s\u1ea3n xu\u1ea5t. (Kh\u00f4ng lo\u1ea1i tr\u1eeb vi\u1ec7c ti\u00eau c\u1ef1 40mm kh\u00e1 t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng ch\u00e9o 43,3mm tr\u00ean t\u1ea5m phim 35mm ch\u00ednh l\u00e0 l\u00fd do gi\u1ea3i th\u00edch cho s\u1ef1 khi\u00eam nh\u01b0\u1eddng n\u00e0y.) C\u00e1c b\u1ea1n \u0111\u1ecdc n\u1ebfu theo d\u00f5i blog n\u00e0y t\u1eeb l\u00e2u, h\u1eb3n \u0111\u00e3 bi\u1ebft tui lu\u00f4n \u01b0u \u00e1i nh\u1eefng thi\u1ebft b\u1ecb nhi\u1ebfp \u1ea3nh nh\u1ecf g\u1ecdn, v\u00e0 l\u1ea7n n\u00e0y c\u0169ng kh\u00f4ng ph\u1ea3i l\u00e0 ngo\u1ea1i l\u1ec7. Tuy nhi\u00ean, k\u00edch c\u1ee1 l\u1ea1i l\u00e0 y\u1ebfu t\u1ed1 ch\u1ee7 quan nh\u1ea5t trong t\u1ea5t c\u1ea3 c\u00e1c y\u1ebfu t\u1ed1 d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ph\u1ea9m ch\u1ea5t c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb \u1ea3nh. Cho n\u00ean, ph\u1ea7n n\u00e0y ta ch\u1ec9 n\u00ean xem l\u00e0 m\u1ed9t s\u1ef1 gi\u1edbi thi\u1ec7u, ch\u1ee9 kh\u00f4ng h\u1eb3n l\u00e0 m\u1ed9t \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i g\u00ec \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\nTh\u1ee9 hai, g\u00f3c nh\u00ecn c\u1ee7a k\u00ednh ti\u00eau c\u1ef1 40mm (ph\u1ea3i nh\u1eafc l\u1ea1i r\u1eb1ng ta \u0111ang v\u00e0 s\u1ebd ch\u1ec9 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u00e1y d\u00f9ng phim 35mm) r\u1ed9ng h\u01a1n tr\u00ean k\u00ednh ti\u00eau c\u1ef1 50mm 8 \u0111\u1ed9. Kh\u00e1c bi\u1ec7t 8 \u0111\u1ed9 n\u00e0y c\u00f3 \u00fd ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o? T\u01b0\u1edfng t\u01b0\u1ee3ng ta \u0111\u1ee9ng c\u00e1ch \u0111\u1ed1i t\u01b0\u1ee3ng ng\u01b0\u1eddi c\u1ea7n ch\u1ee5p m\u1ed9t qu\u00e3ng 2 m\u00e9t, k\u00ednh ti\u00eau c\u1ef1 50mm cho ta m\u1ed9t b\u1ed1 c\u1ee5c kh\u00e1 \u201cch\u1eb7t\u201d, g\u00f3i g\u1ecdn trong kho\u1ea3ng kh\u00f4ng ch\u01b0a \u0111\u1ebfn 1 m\u00e9t r\u01b0\u1ee1i chung quanh ch\u1ee7 th\u1ec3. Trong khi \u0111\u00f3, g\u00f3c nh\u00ecn tr\u00ean k\u00ednh ti\u00eau c\u1ef1 40mm h\u00e0o ph\u00f3ng h\u01a1n khi ch\u1eeba ra th\u00eam m\u1ed9t kho\u1ea3ng r\u1ed9ng c\u1ee1 n\u1eeda m\u00e9t hai b\u00ean. K\u1ebft qu\u1ea3 l\u00e0, \u1ea3nh ch\u1ee5p c\u1ee7a ta ghi nh\u1eadn th\u00eam \u0111\u01b0\u1ee3c m\u1ed9t ph\u1ea7n ba kho\u1ea3ng kh\u00f4ng gian tr\u01b0\u1edbc m\u1eb7t m\u00e0 t\u01b0\u01a1ng quan xa g\u1ea7n bi\u1ec3u ki\u1ebfn c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ee5p kh\u00f4ng kh\u00e1c bi\u1ec7t m\u1ea5y so v\u1edbi m\u1eaft ta nh\u00ecn, n\u1ebfu kh\u00f4ng mu\u1ed1n n\u00f3i l\u00e0 t\u01b0\u01a1ng \u0111\u1ed3ng h\u01a1n so v\u1edbi k\u00ednh 50mm. \u1ea2nh ta ch\u1ee5p c\u00f3 b\u1ed1 c\u1ee5c \u201ctho\u00e1ng\u201d h\u01a1n m\u00e0 v\u1eabn kh\u00f4ng b\u1ecb \u201cm\u00e9o\u201d.<\/p>\n\n\n\n
V\u00e0 k\u00ednh ti\u00eau c\u1ef1 40mm c\u00f3 nh\u01b0\u1ee3c \u0111i\u1ec3m g\u00ec so v\u1edbi ti\u00eau c\u1ef1 50mm?<\/p>\n\n\n\n
Nh\u01b0 b\u00e0i tr\u01b0\u1edbc \u0111\u00e3 l\u00fd gi\u1ea3i, k\u00ednh 50mm lu\u00f4n c\u00f3 nhi\u1ec1u l\u1ef1a ch\u1ecdn kh\u1ea9u \u0111\u1ed9 to l\u1edbn v\u00f4 c\u00f9ng m\u00e0 tr\u00ean k\u00ednh 40mm c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c v\u1edbi gi\u00e1 th\u00e0nh t\u01b0\u01a1ng \u0111\u1ed1i. V\u00ec v\u1eady, tuy\u1ec7t \u0111\u1ea1i \u0111a s\u1ed1 c\u00e1c k\u00ednh ti\u00eau c\u1ef1 40mm c\u00f3 kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a trong kho\u1ea3ng f2 ho\u1eb7c f2.8. \u0110i\u1ec1u n\u00e0y ch\u1eafc ch\u1eafn s\u1ebd l\u00e0m m\u1ed9t s\u1ed1 b\u1ea1n \u1ea3nh e d\u00e8. Th\u1ee9 n\u1eefa, v\u00ec \u0111\u00e2y l\u00e0 m\u1ed9t ti\u00eau c\u1ef1 k\u00ednh kh\u00e1 l\u1ea1, n\u00ean ch\u1eafc ch\u1eafn s\u1ed1 l\u01b0\u1ee3ng hi\u1ec7n t\u1ea1i tr\u00ean th\u1ecb tr\u01b0\u1eddng s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c d\u01b0 d\u1ea3; v\u00e0 v\u00ec v\u1eady, gi\u00e1 th\u00e0nh lu\u00f4n lu\u00f4n cao h\u01a1n so v\u1edbi k\u00ednh 50mm. Tuy nhi\u00ean, m\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7nh v\u1eabn c\u00f2n c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. <\/p>\n\n\n\n
K\u1ebft lu\u1eadn.<\/p>\n\n\n\n
C\u00e1c b\u1ea1n \u1ea3nh, \u0111\u1eebng qu\u00ean ti\u00eau c\u1ef1 k\u00ednh 40mm! N\u1ebfu b\u1ea1n m\u1edbi b\u1eaft \u0111\u1ea7u b\u01b0\u1edbc v\u00e0o nhi\u1ebfp \u1ea3nh, v\u00e0 mu\u1ed1n t\u00ecm m\u1ed9t lo\u1ea1i k\u00ednh c\u00f3 g\u00f3c nh\u00ecn r\u1ed9ng h\u01a1n “ti\u00eau chu\u1ea9n” 50mm nh\u01b0 \u0110\u1ea1t Tr\u1ea7n \u0111\u00e3 n\u00f3i, th\u00ec k\u00ednh 40mm qu\u1ea3 l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn v\u1eeba t\u1ea7m: g\u00f3c \u0111\u1ee7 r\u1ed9ng, t\u01b0\u01a1ng quan xa g\u1ea7n v\u1eabn c\u00f2n r\u1ea5t quen thu\u1ed9c, v\u00e0 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd. C\u00f2n v\u1edbi c\u00e1c b\u1ea1n \u0111\u00e3 am t\u01b0\u1eddng, l\u1ea7n t\u1edbi, n\u1ebfu c\u00f3 tho\u00e1ng th\u1ea5y \u0111\u00e2u \u0111\u00f3 m\u1ed9t \u1ed1ng k\u00ednh 40mm, h\u00e3y \u0111\u1eebng ng\u1ea1i b\u1ecf ch\u00fat th\u00ec gi\u1edd c\u1ea7m l\u00ean ng\u1eafm ngh\u00eda.<\/p>\n\n\n\n
07\/12\/2015<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"K\u1ef3 tr\u01b0\u1edbc ch\u00fang ta \u0111\u00e3 t\u00ecm hi\u1ec3u nguy\u00ean do\u00a0v\u00ec sao k\u00ednh\u00a0ti\u00eau c\u1ef1 50mm (tr\u00ean m\u00e1y d\u00f9ng phim 35mm) l\u1ea1i\u00a0tr\u1edf th\u00e0nh lo\u1ea1i\u00a0k\u00ednh ti\u00eau chu\u1ea9n ph\u1ed5 d\u1ee5ng nh\u1ea5t. K\u1ef3 n\u00e0y, ch\u00fang ta s\u1ebd l\u1ea1m\u00a0b\u00e0n ti\u1ebfp t\u1ee5c\u00a0v\u1ec1 ti\u00eau c\u1ef1 40mm.\u00a0 Tr\u01b0\u1edbc ti\u00ean, tui xin nh\u1eafn nh\u1ee7 m\u1ed9t \u0111i\u1ec1u: kh\u00f4ng c\u00f3 ti\u00eau c\u1ef1 n\u00e0o l\u00e0 ho\u00e0n m\u1ef9 c\u1ea3. T\u00f9y v\u00e0o nhu […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[94],"class_list":["post-293","post","type-post","status-publish","format-standard","hentry","category-all","tag-saigon-analogue"],"_links":{"self":[{"href":"https:\/\/nvbach.com\/index.php?rest_route=\/wp\/v2\/posts\/293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nvbach.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nvbach.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nvbach.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nvbach.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=293"}],"version-history":[{"count":2,"href":"https:\/\/nvbach.com\/index.php?rest_route=\/wp\/v2\/posts\/293\/revisions"}],"predecessor-version":[{"id":408,"href":"https:\/\/nvbach.com\/index.php?rest_route=\/wp\/v2\/posts\/293\/revisions\/408"}],"wp:attachment":[{"href":"https:\/\/nvbach.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nvbach.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nvbach.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}