Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 l\u00e0 g\u00ec? Kh\u1ea9u \u0111\u1ed9 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 quan tr\u1ecdng c\u1ee7a camera v\u00e0 m\u00e1y \u1ea3nh; quy\u1ebft \u0111\u1ecbnh t\u1edbi ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a h\u00ecnh \u1ea3nh sau khi ch\u1ee5p. \u0110\u1ec3 c\u00f3 th\u00eam nhi\u1ec1u th\u00f4ng tin h\u1eefu \u00edch kh\u00e1c, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y theo d\u00f5i nh\u1eefng chia s\u1ebb trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a Vietlearn.org nh\u00e9!<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 l\u00e0 g\u00ec?<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 ch\u00ednh l\u00e0 \u0111\u1ed9 m\u1edf c\u1eeda \u1ed1ng k\u00ednh, gi\u00fap \u0111i\u1ec1u ti\u1ebft l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111i v\u00e0o \u0111\u1ebfn c\u1ea3m bi\u1ebfn c\u1ee7a m\u00e1y \u1ea3nh. Kh\u1ea9u \u0111\u1ed9 c\u1ee7a \u1ed1ng k\u00ednh c\u00e0ng l\u1edbn th\u00ec trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh l\u01b0\u1ee3ng \u00e1nh s\u00e1ng m\u00e0 c\u1ea3m bi\u1ebfn nh\u1eadn \u0111\u01b0\u1ee3c c\u00e0ng nhi\u1ec1u.<\/p>\n\n\n\n
\u0110\u1ecbnh ngh\u0129a kh\u1ea9u \u0111\u1ed9 trong camera, m\u00e1y \u1ea3nh l\u00e0 g\u00ec c\u00f2n \u0111\u01b0\u1ee3c hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n \u0111\u00f3 l\u00e0 \u0111\u1ed9 m\u1edf c\u1ee7a \u1ed1ng k\u00ednh m\u00e1y \u1ea3nh, th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 \u0111i\u1ec1u ch\u1ec9nh l\u01b0\u1ee3ng \u00e1nh s\u00e1ng khi chum tia s\u00e1ng ph\u1ea3n chi\u1ebfu t\u1eeb v\u1eadt th\u1ec3 \u0111i v\u00e0o \u1ed1ng k\u00ednh. K\u00fd hi\u1ec7u c\u1ee7a kh\u1ea9u \u0111\u1ed9 l\u00e0 \u201cf\u201d. Kh\u1ea9u \u0111\u1ed9 c\u00e0ng l\u1edbn th\u00ec \u0111\u1ed9 m\u1edf c\u1ee7a \u1ed1ng k\u00ednh c\u00e0ng l\u1edbn (f 1.7 s\u1ebd l\u1edbn h\u01a1n f2.2) tr\u00ean di \u0111\u1ed9ng. Nh\u01b0ng khi ch\u1ee5p \u1ea3nh ban \u0111\u00eam th\u00ec \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 f1.7 s\u1ebd s\u00e1ng h\u01a1n nhi\u1ec1u so v\u1edbi f2.2.<\/p>\n\n\n\n
\u0110\u01a1n v\u1ecb t\u00ednh kh\u1ea9u \u0111\u1ed9 camera l\u00e0 g\u00ec?<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 \u0111o m\u1ee9c \u0111\u1ed9 c\u1ee7a \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c thu v\u00e0o b\u1edfi c\u1ea3m bi\u1ebfn d\u01b0\u1edbi \u0111\u01a1n v\u1ecb l\u00e0 f\/, v\u00ed d\u1ee5 nh\u01b0 f\/1.9 (f chia 1.9) v\u00ec l\u00e0 s\u1ed1 chia n\u00ean s\u1ed1 ph\u00eda sau c\u00e0ng l\u1edbn th\u00ec kh\u1ea9u \u0111\u1ed9 c\u1ee7a camera s\u1ebd c\u00e0ng nh\u1ecf v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Kh\u1ea9u \u0111\u1ed9 c\u00e0ng b\u00e9 th\u00ec c\u00e0ng thu l\u1ea1i \u0111\u01b0\u1ee3c \u00edt \u00e1nh s\u00e1ng h\u01a1n.<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 c\u00e0ng l\u1edbn (s\u1ed1 f c\u00e0ng nh\u1ecf) th\u00ec c\u00e0ng thu \u0111\u01b0\u1ee3c nhi\u1ec1u \u00e1nh s\u00e1ng h\u01a1n v\u00e0 khi thu \u0111\u01b0\u1ee3c nhi\u1ec1u \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c gi\u1ea3m nhi\u1ec5u tr\u00ean b\u1ee9c \u1ea3nh, ch\u1ee5p \u0111\u00eam t\u1ed1t v\u00e0 kh\u1ea3 n\u0103ng b\u1eaft s\u00e1ng t\u1ed1t cho s\u1ef1 v\u1eadt r\u00f5 r\u00e0ng h\u01a1n. Kh\u1ea9u \u0111\u1ed9 l\u1edbn c\u00f2n gi\u00fap cho hi\u1ec7u \u1ee9ng x\u00f3a ph\u00f4ng tr\u1edf n\u00ean m\u1ecbn m\u00e0ng h\u01a1n.<\/p>\n\n\n\n
\u00dd ngh\u0129a c\u1ee7a kh\u1ea9u \u0111\u1ed9 f l\u00e0 g\u00ec?<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 c\u1ee7a m\u00e1y \u1ea3nh \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn c\u00e1c hi\u1ec7u \u1ee9ng c\u1ee7a m\u1ed9t b\u1ee9c \u1ea3nh, trong \u0111\u00f3 c\u00f3 \u0111\u1ed9 ph\u01a1i s\u00e1ng (exposure). Kh\u1ea9u \u0111\u1ed9 f gi\u00fap b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u1ee7a m\u1ed9t b\u1ee9c \u1ea3nh, khi b\u1ea1n m\u1edf kh\u1ea9u \u0111\u1ed9 l\u1edbn th\u00ec l\u01b0\u1ee3ng \u00e1nh s\u00e1ng t\u1edbi c\u1ea3m bi\u1ebfn s\u1ebd nhi\u1ec1u, gi\u00fap \u1ea3nh tr\u1edf n\u00ean s\u00e1ng h\u01a1n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Khi kh\u1ea9u \u0111\u1ed9 b\u00e9, l\u01b0\u1ee3ng \u00e1nh s\u00e1ng v\u00e0o \u0111\u1ebfn c\u1ea3m bi\u1ebfn \u00edt, khi\u1ebfn cho \u1ea3nh t\u1ed1i h\u01a1n.<\/p>\n\n\n\n
Gi\u00e1 tr\u1ecb ch\u1eef s\u1ed1 v\u1ec1 ch\u00eanh l\u1ec7ch kh\u1ea9u \u0111\u1ed9 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ed1 f, c\u00e1c ti\u00eau chu\u1ea9n v\u1ec1 s\u1ed1 f nh\u01b0 f\/1.4, f\/2. f\/2.8,\u2026Khi b\u1ea1n m\u1edf kh\u1ea9u \u0111\u1ed9 th\u00ec s\u1ed1 f s\u1ebd gi\u1ea3m \u0111i, khi kh\u00e9p kh\u1ea9u th\u00ec \u0111\u1ed9 f s\u1ebd t\u0103ng l\u00ean. S\u1ed1 f l\u1edbn s\u1ebd gi\u00fap \u1ea3nh s\u1eafc n\u00e9t h\u01a1n, c\u00f2n khi f nh\u1ecf nh\u1ea5t th\u00ec b\u1ea1n s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a, cho ph\u00e9p l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111i v\u00e0o l\u1edbn nh\u1ea5t gi\u00fap b\u1ea1n s\u1edf h\u1eefu cho m\u00ecnh hi\u1ec7u \u1ee9ng x\u00f3a ph\u00f4ng t\u1ed1t nh\u1ea5t. Do \u0111\u00f3, khi ch\u1ee5p \u1ea3nh t\u1ea1i c\u00e1c m\u00f4i tr\u01b0\u1eddng thi\u1ebfu s\u00e1ng b\u1ea1n n\u00ean m\u1edf kh\u1ea9u \u0111\u1ed9 l\u1edbn h\u1ebft c\u1ee1 \u0111\u1ec3 thu \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng \u00e1nh s\u00e1ng nhi\u1ec1u nh\u1ea5t.<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng t\u1edbi \u0111\u1ed9 s\u00e2u tr\u01b0\u1eddng \u1ea3nh<\/p>\n\n\n\n
\u0110\u1ed9 s\u00e2u tr\u01b0\u1eddng \u1ea3nh c\u00f3 t\u00ean g\u1ecdi trong ti\u1ebfng anh l\u00e0 Depth of field, l\u00e0 thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 di\u1ec5n t\u1ea3 v\u00f9ng r\u00f5 n\u00e9t c\u1ee7a m\u1ed9t b\u1ee9c \u1ea3nh. Kh\u1ea9u \u0111\u1ed9 f c\u00e0ng nh\u1ecf th\u00ec \u0111\u1ed9 s\u00e2u tr\u01b0\u1eddng \u1ea3nh t\u0103ng l\u00ean, t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u1edf ti\u1ec1n c\u1ea3nh v\u00e0 h\u1eadu c\u1ea3nh \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o \u0111\u00fang n\u00e9t.<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 c\u1ee7a m\u00e1y \u1ea3nh \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng \u1edf m\u1ee9c t\u1ed1i \u0111a th\u00ec \u0111\u1ed9 s\u00e2u tr\u01b0\u1eddng \u1ea3nh s\u1ebd n\u00f4ng h\u01a1n, t\u00e1ch \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ee5p ra kh\u1ecfi h\u1eadu c\u1ea3nh, l\u00e0m cho \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c r\u00f5 n\u00e9t, h\u1eadu c\u1ea3nh s\u1ebd nh\u00f2e \u0111i. Khi ch\u1ee5p ch\u00e2n dung, b\u1ea1n n\u00ean m\u1edf kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a khi ch\u1ee5p, \u0111\u1ec3 mang t\u1edbi hi\u1ec7u \u1ee9ng x\u00f3a ph\u00f4ng tuy\u1ec7t \u0111\u1eb9p. C\u00f2n khi ch\u1ee5p \u1ea3nh phong c\u1ea3nh, b\u1ea1n n\u00ean \u0111\u1ec3 kh\u1ea9u \u0111\u1ed9 nh\u1ecf \u0111\u1ec3 l\u1ea5y \u0111\u01b0\u1ee3c nhi\u1ec1u chi ti\u1ebft h\u01a1n.<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a v\u00e0 kh\u1ea9u \u0111\u1ed9 t\u1ed1i thi\u1ec3u<\/p>\n\n\n\n
M\u1ed7i m\u1ed9t \u1ed1ng k\u00ednh m\u00e1y \u1ea3nh \u0111\u1ec1u quy \u0111\u1ecbnh v\u1ec1 gi\u1edbi h\u1ea1n v\u00e0 m\u1ee9c \u0111\u1ed9 l\u1edbn nh\u1ecf c\u1ee7a kh\u1ea9u \u0111\u1ed9. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi, kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a s\u1ebd quan tr\u1ecdng h\u01a1n, n\u00f3 s\u1ebd cho b\u1ea1n bi\u1ebft \u1ed1ng k\u00ednh c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c bao nhi\u00eau \u00e1nh s\u00e1ng v\u00e0 \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng ch\u1ee5p \u1ea3nh.<\/p>\n\n\n\n
\u1ed0ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a l\u00e0 f\/1.4 ho\u1eb7c f\/1.8 \u0111\u01b0\u1ee3c coi l\u00e0 \u1ed1ng k\u00ednh nhanh v\u00ec c\u00f3 th\u1ec3 cho nhi\u1ec1u \u00e1nh s\u00e1ng h\u01a1n l\u00e0 \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a l\u00e0 f\/4.0. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 l\u00fd do v\u00ec sao \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 l\u1edbn th\u01b0\u1eddng c\u00f3 gi\u00e1 cao h\u01a1n.<\/p>\n\n\n\n
Kh\u1ea9u \u0111\u1ed9 t\u1ed1i thi\u1ec3u kh\u00f4ng quan tr\u1ecdng l\u1eafm v\u00ec h\u1ea7u h\u1ebft c\u00e1c \u1ed1ng k\u00ednh hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh kh\u1ea9u \u0111\u1ed9 t\u1ed1i thi\u1ec3u \u1edf m\u1ee9c f\/16. V\u1edbi m\u1ed9t s\u1ed1 \u1ed1ng k\u00ednh zoom, kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a s\u1ebd thay \u0111\u1ed5i khi b\u1ea1n ph\u00f3ng to v\u00e0 thu nh\u1ecf. M\u1ee9c gi\u00e1 c\u1ee7a \u1ed1ng k\u00ednh zoom th\u01b0\u1eddng cao h\u01a1n b\u1edfi c\u00f3 kh\u1ea3 n\u0103ng duy tr\u00ec kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a kh\u00f4ng \u0111\u1ed5i khi zoom. V\u00e0 \u1ed1ng k\u00ednh m\u1ed9t ti\u00eau c\u1ef1 th\u01b0\u1eddng c\u00f3 kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a l\u1edbn h\u01a1n \u1ed1ng k\u00ednh zoom.<\/p>\n\n\n\n
C\u00e1ch ch\u1ec9nh kh\u1ea9u \u0111\u1ed9 canon hay b\u1ea5t k\u1ef3 lo\u1ea1i m\u00e1y \u1ea3nh n\u00e0o th\u00ec ch\u00fang \u0111\u1ec1u t\u01b0\u01a1ng t\u1ef1 nhau, c\u00f3 2 c\u00e1ch c\u00e0i \u0111\u1eb7t kh\u1ea9u \u0111\u1ed9, \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n
Ch\u1ecdn ch\u1ebf \u0111\u1ed9 \u201c\u01b0u ti\u00ean kh\u1ea9u \u0111\u1ed9\u201d: B\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c quy\u1ec1n \u0111i\u1ec1u ch\u1ec9nh kh\u1ea9u \u0111\u1ed9 c\u00f2n m\u00e1y s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 m\u00e0n tr\u1eadp cho b\u1ea1n.<\/p>\n\n\n\n
Ch\u1ecdn ch\u1ebf \u0111\u1ed9 \u201cth\u1ee7 c\u00f4ng\u201d: B\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u1ea3 kh\u1ea9u \u0111\u1ed9 v\u00e0 t\u1ed1c \u0111\u1ed9 m\u00e0n tr\u1eadp theo \u00fd mu\u1ed1n.<\/p>\n\n\n\n
\u1ede ch\u1ebf \u0111\u1ed9 th\u1ee7 c\u00f4ng, c\u00e1c thi\u1ebft l\u1eadp ph\u01a1i s\u00e1ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1c nhi\u1ebfp \u1ea3nh gia g\u1ecdi l\u00e0 \u201cf stop\u201d. \u201cEV\u201d ho\u1eb7c gi\u00e1 tr\u1ecb ph\u01a1i s\u00e1ng cho ph\u00e9p b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111i v\u00e0o m\u00e1y \u1ea3nh. T\u0103ng 1 stop kh\u1ea9u \u0111\u1ed9 th\u00ec s\u1ebd l\u00e0m gi\u1ea3m \u0111i m\u1ed9t n\u1eeda l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111i v\u00e0o m\u00e1y \u1ea3nh. N\u1ebfu gi\u1ea3m 1 stop kh\u1ea9u \u0111\u1ed9 s\u1ebd t\u0103ng g\u1ea5p \u0111\u00f4i l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111i v\u00e0o m\u00e1y \u1ea3nh.<\/p>\n\n\n\n
V\u1edbi h\u1ea7u h\u1ebft c\u00e1c m\u00e1y \u1ea3nh DSLR, ngo\u00e0i c\u00f3 1stop ti\u00eau chu\u1ea9n th\u00ec b\u1ea1n c\u00f3 th\u1ec3 c\u00e0i \u0111\u1eb7t s\u1ed1 stop \u1edf c\u00e1c kho\u1ea3ng c\u00e1ch t\u0103ng 1\/2 v\u00e0 1\/3. V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n c\u00e0i \u0111\u1eb7t 1\/3 stop, vi ph\u1ea1m m\u1ed9t s\u1ed1 stop ho\u00e0n ch\u1ec9nh gi\u1eefa f2\/8 v\u00e0 f\/4 \u0111\u01b0\u1ee3c chia th\u00e0nh 3 ph\u1ea7n, n\u00f3 tr\u1edf th\u00e0nh f2\/8, f3\/2,\u2026.Vi\u1ec7c s\u1eed d\u1ee5ng 1\/3 stop s\u1ebd cho ph\u00e9p b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111i v\u00e0o m\u00e1y \u1ea3nh.<\/p>\n\n\n\n
Tr\u01b0\u1edbc khi mua m\u00e1y \u1ea3nh, b\u1ea1n c\u1ea7n ph\u1ea3i x\u00e1c \u0111\u1ecbnh r\u00f5 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng v\u00e0 kho\u1ea3n chi ph\u00ed \u0111\u1ec3 mua m\u00e1y \u1ea3nh. Tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay, c\u00f3 kh\u1ea9u \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh v\u00e0 kh\u1ea9u \u0111\u1ed9 \u0111\u1ed9ng. Lo\u1ea1i kh\u1ea9u \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh nh\u01b0 f\/2.8, f2\/2, f\/1.8 \u0111\u01b0\u1ee3c khuy\u00ean d\u00f9ng s\u1eed d\u1ee5ng b\u1edfi kh\u1ea3 n\u0103ng ch\u1ee5p trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu, kh\u00f4ng c\u00f3 \u0111\u00e8n flash v\u00e0 kh\u1ea3 n\u0103ng x\u00f3a ph\u00f4ng ch\u1ee5p ch\u00e2n dung t\u1ed1t h\u01a1n.<\/p>\n\n\n\n
V\u1ec1 \u0111\u1ed9 l\u1edbn c\u1ee7a kh\u1ea9u \u0111\u1ed9, c\u00e1c lo\u1ea1i \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 l\u1edbn nh\u01b0 f\/2.8 s\u1ebd cho \u0111\u1ed9 m\u1edd h\u1eadu \u1ea3nh l\u1edbn, c\u00f2n c\u00e1c kh\u1ea9u \u0111\u1ed9 nh\u1ecf nh\u01b0 f\/8, f\/11 th\u00ec s\u1ebd gi\u00fap b\u1ea1n ch\u1ee5p c\u00e1c chi ti\u1ebft s\u1eafc n\u00e9t \u1edf c\u1ea3 ti\u1ec1n c\u1ea3nh v\u00e0 h\u1eadu c\u1ea3nh.<\/p>\n\n\n\n
M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 kh\u1ea9u \u0111\u1ed9 camera<\/p>\n\n\n\n
f\/0.95 \u2013 f\/1.4: Kho\u1ea3ng kh\u1ea9u \u0111\u1ed9 n\u00e0y ch\u1ec9 c\u00f3 tr\u00ean c\u00e1c \u1ed1ng k\u00ednh ti\u00eau c\u1ef1 cao, cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng thu l\u1ea1i \u0111\u01b0\u1ee3c nhi\u1ec1u \u00e1nh s\u00e1ng, gi\u00fap \u00edch cho vi\u1ec7c ch\u1ee5p \u1ea3nh trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu.<\/p>\n\n\n\n
f\/1.8 \u2013 f\/2.0: L\u00e0 lo\u1ea1i \u1ed1ng k\u00ednh c\u00f3 kh\u1ea3 n\u0103ng thu s\u00e1ng y\u1ebfu h\u01a1n so v\u1edbi \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 f\/0.95 \u2013 f\/1.4 nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 t\u1ea1o ra nh\u1eefng b\u1ee9c h\u00ecnh \u0111\u1eb9p. Khi s\u1eed d\u1ee5ng \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 n\u00e0y s\u1ebd t\u1ea1o ra \u0111\u1ed9 s\u00e2u cho \u1ea3nh ph\u00f9 h\u1ee3p cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u1edf kho\u1ea3ng c\u00e1ch g\u1ea7n.<\/p>\n\n\n\n
f\/5.6 \u2013 f\/8: L\u00e0 lo\u1ea1i lens m\u00e1y \u1ea3nh c\u00f3 kh\u1ea9u \u0111\u1ed9 ph\u00f9 h\u1ee3p \u0111\u1ec3 ch\u1ee5p phong c\u1ea3nh v\u00e0 ki\u1ebfn tr\u00fac. M\u1ee9c kh\u1ea9u \u0111\u1ed9 t\u1ed1i \u0111a l\u00e0 f5\/6, mang \u0111\u1ed9 s\u1eafc n\u00e9t t\u1ed5ng th\u1ec3 t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n
f\/11 \u2013 f\/16: M\u1ee9c kh\u1ea9u \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng hay s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ee5p ki\u1ebfn tr\u00fac v\u00e0 ch\u1ee5p \u1ea3nh macro. Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, b\u1ea1n kh\u00f4ng n\u00ean \u0111i\u1ec1u ch\u1ec9nh kh\u1ea9u \u0111\u1ed9 c\u1ee7a m\u00e1y \u1ea3nh xu\u1ed1ng f \u2013 stop qu\u00e1 f\/8 v\u00ec \u1ea3nh s\u1ebd b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111i \u0111\u1ed9 s\u1eafc n\u00e9t do s\u1ef1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec5m x\u1ea1 \u1ed1ng k\u00ednh.<\/p>\n\n\n\n
Mong r\u1eb1ng, c\u00e1c th\u00f4ng tin chia s\u1ebb tr\u00ean \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m kh\u1ea9u \u0111\u1ed9 l\u00e0 g\u00ec trong camera v\u00e0 m\u00e1y \u1ea3nh. B\u1ea5t k\u1ef3 \u0111\u00f3ng g\u00f3p n\u00e0o cho b\u00e0i vi\u1ebft, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y comment ph\u00eda d\u01b0\u1edbi, Vietlearn.org s\u1ebd t\u1ed5ng h\u1ee3p v\u00e0 g\u1eedi t\u1edbi b\u1ea1n trong th\u1eddi gian s\u1edbm nh\u1ea5t!<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Kh\u1ea9u \u0111\u1ed9 l\u00e0 g\u00ec? Kh\u1ea9u \u0111\u1ed9 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 quan tr\u1ecdng c\u1ee7a camera v\u00e0 m\u00e1y \u1ea3nh; quy\u1ebft \u0111\u1ecbnh t\u1edbi ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a h\u00ecnh \u1ea3nh sau khi ch\u1ee5p. \u0110\u1ec3 c\u00f3 th\u00eam nhi\u1ec1u th\u00f4ng tin h\u1eefu \u00edch kh\u00e1c, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y theo d\u00f5i nh\u1eefng chia s\u1ebb trong b\u00e0i vi\u1ebft […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1],"tags":[],"class_list":["post-3794","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=3794"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3794\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=3794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=3794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=3794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}