{"id":27850,"date":"2019-09-12T17:06:51","date_gmt":"2019-09-12T10:06:51","guid":{"rendered":"https:\/\/phongvu.vn\/cong-nghe\/?p=27850"},"modified":"2019-09-12T17:06:51","modified_gmt":"2019-09-12T10:06:51","slug":"tim-hieu-ve-thuat-ngu-ky-hieu-tren-ong-kinh-canon","status":"publish","type":"post","link":"https:\/\/phongvu.vn\/cong-nghe\/tim-hieu-ve-thuat-ngu-ky-hieu-tren-ong-kinh-canon\/","title":{"rendered":"T\u00ecm hi\u1ec3u v\u1ec1 thu\u1eadt ng\u1eef\/ k\u00fd hi\u1ec7u tr\u00ean \u1ed1ng k\u00ednh Canon"},"content":{"rendered":"

C\u1ea7m tr\u00ean tay m\u1ed9t chi\u1ebfc m\u00e1y DSLR m\u00e0 b\u1ea1n l\u00fang t\u00fang kh\u00f4ng hi\u1ec3u c\u00e1c k\u00fd hi\u1ec7u tr\u00ean th\u00e2n m\u00e1y mu\u1ed1n n\u00f3i l\u00ean \u0111i\u1ec1u g\u00ec? \u0110\u1ec3 l\u00e0m ch\u1ee7 chi\u1ebfc m\u00e1y & ch\u1ee5p \u0111\u01b0\u1ee3c nh\u1eefng t\u1ea5m h\u00ecnh \u0111\u1eb9p cho m\u00ecnh th\u00ec hi\u1ec3n nhi\u00ean \u0111i\u1ec1u tr\u01b0\u1edbc ti\u00ean b\u1ea1n n\u00ean n\u1eafm r\u00f5 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 n\u00f3.<\/p>\n

\"\"L (luxury)<\/strong><\/p>\n

C\u00e1c \u1ed1ng k\u00ednh c\u00f3 k\u00fd hi\u1ec7u L \u0111\u1ec1u thu\u1ed9c d\u00f2ng \u1ed1ng k\u00ednh sang tr\u1ecdng c\u1ee7a Canon cho bi\u1ebft \u0111\u00e2y l\u00e0 nh\u1eefng lens c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t nh\u1ea5t c\u1ee7a Canon v\u00e0 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o ph\u1ee5c v\u1ee5 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng chuy\u00ean nghi\u1ec7p v\u00e0 c\u00e1c tay ch\u01a1i s\u00e0nh \u0111i\u1ec7u. C\u00e1c \u1ed1ng L cho ch\u1ea5t l\u01b0\u1ee3ng \u1ea3nh cao, t\u1ef1 \u0111\u1ed9ng c\u0103n n\u00e9t nhanh, c\u1ea5u t\u1ea1o ch\u1eafc ch\u1eafn v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eddi ti\u1ebft x\u1ea5u do c\u00f3 c\u00e1c l\u1edbp keo g\u1eafn b\u1ea3o v\u1ec7 (h\u1ea7u h\u1ebft c\u00e1c \u1ed1ng Canon sx sau 1999 \u0111\u1ec1u c\u00f3 keo g\u1eafn).<\/p>\n

IS (image stablizer)<\/strong><\/p>\n

\u1ed0ng k\u00ednh c\u00f3 k\u00fd hi\u1ec7u IS c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng rung v\u00e0 cho ph\u00e9p ch\u1ee5p \u1edf t\u1ed1c \u0111\u1ed9 ch\u1eadm h\u01a1n th\u00f4ng th\u01b0\u1eddng 2-3 stop. Th\u1eadm ch\u00ed Canon tuy\u00ean b\u1ed1 c\u00e1c \u1ed1ng ch\u1ed1ng rung IS c\u1ee7a h\u00e3ng th\u1ebf h\u1ec7 m\u1edbi nh\u1ea5t cho ph\u00e9p ch\u1ee5p \u1edf t\u1ed1c \u0111\u1ed9 ch\u1eadm h\u01a1n t\u1edbi 4 stop. IS l\u00e0 ch\u1ee9c n\u0103ng h\u1ebft s\u1ee9c quan tr\u1ecdng gi\u00fap \u1ea3nh kh\u00f4ng b\u1ecb m\u1ea5t n\u00e9t.<\/p>\n

USM (ultra-sonic motor)<\/strong><\/p>\n

C\u00e1c \u1ed1ng k\u00ednh USM c\u00f3 g\u1eafn m\u00f4-t\u01a1 si\u00eau \u00e2m. \u0110\u00e2y l\u00e0 \u0111i\u1ec3m quan tr\u1ecdng gi\u00fap c\u0103n n\u00e9t t\u1ef1 \u0111\u1ed9ng nhanh v\u00e0 ph\u1ee5c v\u1ee5 h\u1eefu hi\u1ec7u c\u0103n n\u00e9t ho\u00e0n to\u00e0n b\u1eb1ng tay.C\u00f3 hai lo\u1ea1i \u1ed1ng USM: m\u1ed9t lo\u1ea1i c\u00f3 v\u00f2ng USM ch\u1ea5t l\u01b0\u1ee3ng tuy\u1ec7t h\u1ea3o v\u00e0 lo\u1ea1i kia l\u00e0 \u1ed1ng micro USM ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m h\u01a1n nhi\u1ec1u. H\u1ea7u nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c \u1ed1ng k\u00ednh L USM \u0111\u1ec1u d\u00f9ng v\u00f2ng USM, c\u00f2n lo\u1ea1i kh\u00f4ng c\u00f3 k\u00fd hi\u1ec7u L, \u0111\u1eb7c bi\u1ec7t c\u00e1c \u1ed1ng c\u00f3 gi\u00e1 th\u1ea5p \u0111\u1ec1u s\u1eed d\u1ee5ng micro USM.<\/p>\n

DO (Diffactive Optic)<\/strong><\/p>\n

Canon c\u00f3 hai lo\u1ea1i s\u1eed d\u1ee5ng chi ti\u1ebft th\u1ea5u k\u00ednh DO l\u00e0 \u1ed1ng 70-300mm f\/4.5-5.6 DO v\u00e0 \u1ed1ng 400mm f\/4 DO. C\u00e1c \u1ed1ng n\u00e0y nh\u1eb9 v\u00e0 nh\u1ecf h\u01a1n c\u00e1c \u1ed1ng kh\u00f4ng s\u1eed d\u1ee5ng chi ti\u1ebft th\u1ea5u k\u00ednh DO, nh\u01b0ng c\u00f3 gi\u00e1 r\u1ea5t cao c\u00f2n ch\u1ea5t l\u01b0\u1ee3ng l\u1ea1i ch\u01b0a th\u1ef1c s\u1ef1 x\u1ee9ng \u0111\u00e1ng v\u1edbi gi\u00e1 ti\u1ec1n.<\/p>\n

MP-E (macro-photo)<\/strong><\/p>\n

\u1ed0ng MP-E \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ch\u1ee5p marco (ch\u1ee5p ph\u00f3ng \u0111\u1ea1i c\u00f4n tr\u00f9ng nh\u1ecf nh\u01b0 ong, b\u01b0\u1edbm, ki\u1ebfn, v.v\u2026). C\u00e1c \u1ed1ng c\u00f3 k\u00fd hi\u1ec7u n\u00e0y kh\u00f4ng c\u00f3 ch\u1ebf \u0111\u1ed9 c\u0103n n\u00e9t t\u1ef1 \u0111\u1ed9ng (auto-focus). T\u1eeb \u0111i\u1ec7n t\u1eed (electronic) \u1edf \u0111\u00e2y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u01a1 ch\u1ebf \u0111i\u1ec1u ch\u1ec9nh kh\u1ea9u \u0111\u1ed9 m\u1edf \u0111i\u1ec7n t\u1eed. \u0110\u00e2y l\u00e0 lo\u1ea1i \u1ed1ng duy nh\u1ea5t hi\u1ec7n nay c\u00f3 kh\u1ea3 n\u0103ng l\u1ea5y c\u1eadn c\u1ea3nh l\u00ean t\u1edbi t\u1ef7 l\u1ec7 5:1 m\u00e0 kh\u00f4ng c\u1ea7n \u1ed1ng g\u1eafn d\u00e0i v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c. \u1ed0ng n\u00e0y kh\u00f4ng c\u00f3 \u0111\u1ed1i th\u1ee7 c\u1ee7a Nikon, Sony v\u00e0 Olympus. M\u1eb7c d\u00f9 v\u1eady, \u1ed1ng n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c li\u1ec7t v\u00e0o ch\u1ee7ng lo\u1ea1i L. \u1ed0ng n\u00e0y c\u00f3 c\u1ea5u t\u1ea1o ch\u1eafc ch\u1eafn v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u1ea3nh chuy\u00ean nghi\u1ec7p. \u1ed0ng MP-E \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ch\u1ee5p marco c\u00f4n tr\u00f9ng nh\u1ecf ( v\u00ed d\u1ee5 nh\u01b0 ch\u1ee5p ph\u00f3ng \u0111\u1ea1i ong b\u01b0\u1edbm, ki\u1ebfn\u2026).<\/p>\n

AFD (Auto-Focus Drive)<\/strong><\/p>\n

M\u1ed9t lo\u1ea1i m\u00f4-t\u01a1 b\u00ean trong \u1ed1ng k\u00ednh \u0111\u1eddi c\u1ed5, c\u0103n n\u00e9t ch\u1eadm v\u00e0 th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 \u1ed3n l\u1edbn.<\/p>\n

AF (Auto Focus) <\/strong>Ch\u1ebf \u0111\u1ed9 l\u1ea5y n\u00e9t t\u1ef1 \u0111\u1ed9ng<\/p>\n

MF (Manual Focus) <\/strong>Ch\u1ebf \u0111\u1ed9 l\u1ea5y n\u00e9t b\u1eb1ng tay<\/p>\n

EF (Electro-Focus)<\/strong><\/p>\n

C\u00e1c \u1ed1ng k\u00ednh EF c\u00f3 c\u01a1 ch\u1ebf c\u0103n n\u00e9t t\u1ef1 \u0111\u1ed9ng v\u1edbi m\u00f4 t\u01a1 \u0111i\u1ec7n t\u1eed tinh vi g\u1eafn ngay trong \u1ed1ng k\u00ednh. T\u1ea5t c\u1ea3 th\u00f4ng tin gi\u1eefa \u1ed1ng k\u00ednh v\u00e0 th\u00e2n m\u00e1y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua c\u00e1c ch\u00e2n ti\u1ebfp x\u00fac \u0111i\u1ec7n t\u1eed. C\u00e1c \u1ed1ng EF c\u1ee7a Canon c\u00f3 ng\u1ea1nh g\u00e1 ph\u00f9 h\u1ee3p v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c th\u00e2n m\u00e1y d\u00f2ng EOS c\u1ee7a Canon.<\/p>\n

EF v\u00e0 EF-S l\u00e0 k\u00fd hi\u1ec7u c\u1ee7a c\u00e1c \u1ed1ng k\u00ednh Canon s\u1eed d\u1ee5ng ng\u00e0m (hay c\u00f2n g\u1ecdi l\u00e0 mount). EOS Electro-Focus \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1eeb n\u0103m 1987. C\u00e1c \u1ed1ng k\u00ednh EF d\u00e0nh cho d\u00f2ng m\u00e1y full-frame (5D, 5D MarkII…), trong khi \u0111\u00f3 k\u00fd hi\u1ec7u EF-S l\u00e0 \u1ed1ng k\u00ednh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u00e1y \u1ea3nh c\u00f3 c\u1ea3m bi\u1ebfn nh\u1ecf (crop 1.6x), ch\u1eef S c\u00f3 ngh\u0129a l\u00e0 \u1ed1ng k\u00ednh c\u00f3 ti\u00eau c\u1ef1 ng\u1eafn short back focus. C\u00e1c \u1ed1ng EF-S c\u00f3 ph\u1ea7n \u0111u\u00f4i nh\u00f4 s\u00e2u h\u01a1n, do \u0111\u00f3 kh\u00f4ng th\u1ec3 g\u1eafn l\u00ean c\u00e1c m\u00e1y full-frame. \u1ed0ng k\u00ednh EF-S xu\u1ea5t hi\u1ec7n kho\u1ea3ng t\u1eeb n\u0103m 2003 c\u00f9ng v\u1edbi m\u00e1y \u1ea3nh 300D & 20D. Nhi\u1ec1u \u1ed1ng EF-S c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng quang h\u1ecdc r\u1ea5t t\u1ed1t nh\u01b0ng gi\u00e1 l\u1ea1i kh\u00f4ng cao, ph\u00f9 h\u1ee3p v\u1edbi ng\u01b0\u1eddi d\u00f9ng ph\u1ed5 th\u00f4ng.<\/p>\n

EF-S (Electro-Focus \u2013 Short back focus)<\/strong><\/p>\n

C\u00e1c \u1ed1ng EF-S \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho c\u00e1c lo\u1ea1i m\u00e1y \u1ea3nh s\u1ed1 g\u1eafn c\u1ea3m bi\u1ebfn APS-C (Advanced Photo System type-C), v\u00ed d\u1ee5 nh\u01b0 chi\u1ebfc 40D v\u00e0 400D. C\u00e1c \u1ed1ng n\u00e0y kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng v\u1edbi c\u00e1c th\u00e2n m\u00e1y full frame \u2013 FF v\u00e0 d\u00f2ng APS-H do \u1ed1ng c\u00f3 c\u00e1c chi ti\u1ebft th\u1ea5u k\u00ednh c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng g\u01b0\u01a1ng c\u1ee7a th\u00e2n m\u00e1y FF. H\u01a1n n\u1eefa, khu\u00f4n h\u00ecnh ch\u1ec9 v\u1eeba \u0111\u1ee7 cho c\u00e1c c\u1ea3m bi\u1ebfn APS. C\u00f4ng ngh\u1ec7 th\u1ea5u k\u00ednh sau ng\u1eafn (S = short back focus) \u2013 th\u1ea5u k\u00ednh ph\u00eda sau c\u1ee7a \u1ed1ng k\u00ednh \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed g\u1ea7n v\u1edbi c\u1ea3m bi\u1ebfn h\u01a1n cho ph\u00e9p s\u1ea3n xu\u1ea5t c\u00e1c \u1ed1ng k\u00ednh g\u00f3c r\u1ed9ng, nh\u1eb9 v\u00e0 gi\u00e1 th\u00e0nh r\u1ebb h\u01a1n.<\/p>\n

ED (Extra-low Dispersion)<\/strong><\/p>\n

Th\u1ea5u k\u00ednh s\u1eed d\u1ee5ng ch\u1ea5t li\u1ec7u k\u00ednh c\u00f3 \u0111\u1ed9 t\u00e1n x\u1ea1 th\u1ea5p, gi\u00fap gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng s\u1eafc sai.<\/p>\n

EOS* (Electronic\/Electro Optical System)<\/strong><\/p>\n

\u201cH\u1ec7 th\u1ed1ng quang h\u1ecdc \u0111i\u1ec7n t\u1eed\u201d \u2013 K\u00fd hi\u1ec7u th\u01b0\u1eddng th\u1ea5y tr\u00ean th\u00e2n c\u00e1c m\u00e1y \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1 \u1ed1ng k\u00ednh r\u1eddi SLR c\u1ee7a Canon. Tuy nhi\u00ean, nhi\u1ec1u chuy\u00ean gia cho r\u1eb1ng \u0111\u00e2y ch\u1ec9 l\u00e0 c\u00e1ch lu\u1eadn t\u1eeb kh\u00f4ng ch\u00ednh x\u00e1c v\u00e0 Canon \u0111\u1eb7t t\u00ean m\u00e1y SLR theo t\u00ean m\u1ed9t v\u1ecb th\u1ea7n b\u00ecnh minh Eos.<\/p>\n

FE (Fish Eye)<\/strong><\/p>\n

\u1ed0ng k\u00ednh m\u1eaft c\u00e1 c\u1ee7a Canon. N\u00f3 c\u00f3 t\u00ean g\u1ecdi nh\u01b0 v\u1eady v\u00ec \u1ea3nh ch\u1ee5p ra c\u00f3 hi\u1ec7u \u1ee9ng cong nh\u01b0 g\u00f3c nh\u00ecn c\u1ee7a m\u1eaft c\u00e1. \u0110\u00e2y c\u0169ng l\u00e0 lo\u1ea1i \u1ed1ng k\u00ednh c\u00f3 kh\u1ea3 n\u0103ng bao qu\u00e1t tr\u01b0\u1eddng nh\u00ecn c\u1ef1c r\u1ed9ng. \u1ed0ng fisheye ban \u0111\u1ea7u \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 s\u1eed d\u1ee5ng trong ng\u00e0nh kh\u00ed t\u01b0\u1ee3ng th\u1ee7y v\u0103n nh\u1eb1m theo d\u00f5i s\u1ef1 h\u00ecnh th\u00e0nh m\u00e2y, n\u00ean c\u00f3 t\u00ean g\u1ecdi kh\u00e1 ph\u1ed5 bi\u1ebfn l\u00e0 \u1ed1ng k\u00ednh “to\u00e0n b\u1ea7u tr\u1eddi” (whole-sky lens). Lo\u1ea1i \u1ed1ng k\u00ednh n\u00e0y sau \u0111\u00f3 nhanh ch\u00f3ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn trong nhi\u1ebfp \u1ea3nh do nh\u1eefng hi\u1ec7u \u1ee9ng \u0111\u1ed9c nh\u1ea5t v\u00f4 nh\u1ecb m\u00e0 ch\u00fang \u0111em l\u1ea1i. \u0110\u1eb7c bi\u1ec7t, th\u1ec3 lo\u1ea1i nhi\u1ebfp \u1ea3nh b\u00e1n c\u1ea7u (Hemispherical photography) th\u01b0\u1eddng hay s\u1eed d\u1ee5ng fisheye cho nhi\u1ec1u m\u1ee5c \u0111\u00edch khoa h\u1ecdc, ch\u1eb3ng h\u1ea1n nghi\u00ean c\u1ee9u d\u1ea1ng t\u1ed5ng th\u1ec3 c\u1ee7a t\u00e1n c\u00e2y hay t\u00ednh to\u00e1n n\u0103ng l\u01b0\u1ee3ng b\u1ee9c x\u1ea1 m\u1eb7t tr\u1eddi s\u00e1t m\u1eb7t \u0111\u1ea5t.<\/p>\n

\"\"<\/p>\n

\u1ed0ng fisheye th\u01b0\u1eddng l\u00e0 \u1ed1ng 1 ti\u00eau c\u1ef1 (fixed lens) n\u00ean b\u1ea1n bu\u1ed9c ph\u1ea3i zoom b\u1eb1ng… ch\u00e2n n\u1ebfu mu\u1ed1n thu g\u1ecdn \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0o khung h\u00ecnh. \u0110\u1eebng ng\u1ea1i v\u1ea5t v\u1ea3 v\u00ec m\u1ed9t b\u1ee9c \u1ea3nh \u1ea5n t\u01b0\u1ee3ng lu\u00f4n ph\u1ea3i th\u1ec3 hi\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 y\u1ebfu t\u1ed1 c\u1ee7a ch\u1ee7 th\u1ec3 c\u0169ng nh\u01b0 t\u00f4n tr\u1ecdng c\u00e1c quy t\u1eafc ph\u1ed1i c\u1ea3nh chung. C\u0169ng c\u00f3 kh\u00e1 nhi\u1ec1u \u1ed1ng m\u1eaft c\u00e1 zoom \u0111\u01b0\u1ee3c, ch\u1eb3ng h\u1ea1n Canon Fisheye 8-15mm… B\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn ch\u00fang \u0111\u1ec3 d\u1ec5 d\u00e0ng h\u01a1n khi nhi\u1ebfp \u1ea3nh phong c\u1ea3nh.<\/p>\n

T\u1ea5t c\u1ea3 \u1ed1ng k\u00ednh ti\u00eau c\u1ef1 r\u1ed9ng c\u00f3 tr\u01b0\u1eddng nh\u00ecn qu\u00e1 90 \u0111\u1ed9 \u0111\u1ec1u g\u1eb7p ph\u1ea3i hi\u1ec7n t\u01b0\u1ee3ng m\u00e9o h\u00ecnh. Ti\u00eau c\u1ef1 c\u00e0ng nh\u1ecf m\u00e9o h\u00ecnh c\u00e0ng tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng. Do v\u1eady, ngo\u00e0i kh\u1ea3 n\u0103ng bao qu\u00e1t m\u1ed9t khu v\u1ef1c c\u1ea3nh r\u1ed9ng l\u1edbn, \u1ed1ng k\u00ednh fisheye c\u00f2n \u0111em l\u1ea1i nh\u1eefng hi\u1ec7u \u1ee9ng \u0111\u1eb7c bi\u1ec7t nh\u01b0 b\u1ebb c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng th\u00e0nh \u0111\u01b0\u1eddng cong (v\u00e0 ng\u01b0\u1ee3c l\u1ea1i), ho\u1eb7c cho \u1ea3nh c\u00e1c v\u1eadt th\u1ec3 kh\u00f4ng tu\u00e2n theo t\u1ef7 l\u1ec7 xa g\u1ea7n nh\u01b0 nh\u00ecn b\u1eb1ng m\u1eaft th\u01b0\u1eddng. L\u01b0u \u00fd r\u1eb1ng, th\u1ec3 lo\u1ea1i panorama th\u1ef1c hi\u1ec7n tr\u00ean c\u00e1c th\u1ea5u k\u00ednh quay hay b\u1eb1ng c\u00e1ch gh\u00e9p li\u00ean ti\u1ebfp \u1ea3nh kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t d\u1ea1ng nhi\u1ebfp \u1ea3nh fisheye d\u00f9 tr\u01b0\u1eddng nh\u00ecn thu \u0111\u01b0\u1ee3c kh\u00f4ng h\u1ec1 thua k\u00e9m. N\u00ean ki\u1ec3m tra ti\u00eau c\u1ef1 \u1ed1ng k\u00ednh tr\u01b0\u1edbc khi ch\u1ee5p. \u1ed0ng k\u00ednh fisheye c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nh\u01b0 g\u00f3c r\u1ed9ng khi zoom ra h\u1ebft c\u1ee1, r\u1ea5t th\u00edch h\u1ee3p \u0111\u1ec3 ch\u1ee5p ch\u00e2n dung ho\u1eb7c m\u1ed9t s\u1ed1 pha \u0111\u1eddi th\u01b0\u1eddng. B\u1ea1n c\u0169ng c\u1ea7n l\u01b0u \u00fd r\u1eb1ng, d\u1ea3i ti\u00eau c\u1ef1 c\u1ee7a \u1ed1ng c\u00e0ng h\u1eb9p, \u1ea3nh thu \u0111\u01b0\u1ee3c s\u1ebd c\u00e0ng \u0111\u1ee1 b\u1ecb m\u00e9o. X\u00e9t v\u1ec1 b\u1ea3n ch\u1ea5t v\u1eadt l\u00fd, lo\u1ea1i \u1ed1ng k\u00ednh n\u00e0y c\u00f3 ti\u00eau c\u1ef1 d\u01b0\u1edbi 20 mm v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ebf t\u1ea1o theo chu\u1ea9n 8, 10, 15 hay 16 mm khi quy \u0111\u1ed5i tr\u00ean h\u1ec7 m\u00e1y phim 35 mm.<\/p>\n

IF (Inner Focus)<\/strong><\/p>\n

C\u0103n n\u00e9t trong. C\u00e1c \u1ed1ng IF c\u00f3 c\u01a1 ch\u1ebf c\u0103n trong \u0111\u00f3 c\u00e1c th\u1ea5u k\u00ednh\/ nh\u00f3m th\u1ea5u k\u00ednh chuy\u1ec3n \u0111\u1ed9ng b\u00ean trong \u1ed1ng khi c\u0103n n\u00e9t, kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng t\u1edbi chi\u1ec1u d\u00e0i \u1ed1ng khi c\u0103n n\u00e9t (\u1ed1ng kh\u00f4ng th\u00f2 ra th\u1ee5t v\u00e0o khi c\u0103n n\u00e9t).<\/p>\n

SF (Soft Focus)<\/strong>
\n\u1ed0ng k\u00ednh c\u00f3 kh\u1ea3 n\u0103ng c\u0103n n\u00e9t m\u1ecbn c\u1ee7a Canon.<\/p>\n

STM (Stepping Motor)<\/strong>
\nM\u00f4-t\u01a1 c\u0103n n\u00e9t th\u1ebf h\u1ec7 m\u1edbi c\u1ee7a Canon (ra n\u0103m 2012). Theo Canon, c\u00f4ng ngh\u1ec7 STM cho ph\u00e9p c\u0103n n\u00e9t \u00eam h\u01a1n, m\u01b0\u1ee3t h\u01a1n v\u00e0 cho ph\u00e9p c\u0103n n\u00e9t li\u1ec7n t\u1ee5c khi s\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng quay video tr\u00ean m\u00e1y \u1ea3nh DSLR.<\/p>\n

TS-E (tilt and shift)<\/strong>
\nC\u00e1c \u1ed1ng tr\u01b0\u1ee3t nghi\u00eang cho ph\u00e9p l\u00e0m ch\u1ee7 chi\u1ec1u s\u00e2u v\u00e0 g\u00f3c m\u00e1y. Hi\u1ec7n nay ch\u1ec9 c\u00f3 3 lo\u1ea1i \u1ed1ng TS-E l\u00e0 \u1ed1ng 24mm, 45mm v\u00e0 90mm. \u1ed0ng 24mm TS-E l\u00e0 \u1ed1ng duy nh\u1ea5t c\u00f3 k\u00fd hi\u1ec7u L. C\u00e1c \u1ed1ng k\u00ednh TS-E n\u00e0y l\u00e0 c\u00e1c \u1ed1ng k\u00ednh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho ch\u1ee5p ki\u1ebfn tr\u00fac nh\u01b0ng chi\u1ebfc 24mm c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ch\u1ee5p phong c\u1ea3nh. Kh\u00e1c v\u1edbi c\u00e1c \u1ed1ng MP-E, \u0111\u00e2y l\u00e0 c\u00e1c \u1ed1ng kh\u00f4ng c\u00f3 ch\u1ebf \u0111\u1ed9 c\u0103n n\u00e9t t\u1ef1 \u0111\u1ed9ng m\u00e0 ch\u1ec9 l\u00e0 c\u00e1c \u1ed1ng c\u0103n n\u00e9t tay EF.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u1ea7m tr\u00ean tay m\u1ed9t chi\u1ebfc m\u00e1y DSLR m\u00e0 b\u1ea1n l\u00fang t\u00fang kh\u00f4ng hi\u1ec3u c\u00e1c k\u00fd hi\u1ec7u tr\u00ean th\u00e2n m\u00e1y mu\u1ed1n n\u00f3i l\u00ean \u0111i\u1ec1u g\u00ec? \u0110\u1ec3 l\u00e0m ch\u1ee7 chi\u1ebfc m\u00e1y & ch\u1ee5p \u0111\u01b0\u1ee3c nh\u1eefng t\u1ea5m h\u00ecnh \u0111\u1eb9p cho m\u00ecnh th\u00ec hi\u1ec3n nhi\u00ean \u0111i\u1ec1u tr\u01b0\u1edbc ti\u00ean b\u1ea1n n\u00ean n\u1eafm r\u00f5 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 n\u00f3. […]<\/p>\n","protected":false},"author":1,"featured_media":27851,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/posts\/27850"}],"collection":[{"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/comments?post=27850"}],"version-history":[{"count":1,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/posts\/27850\/revisions"}],"predecessor-version":[{"id":27854,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/posts\/27850\/revisions\/27854"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/media\/27851"}],"wp:attachment":[{"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/media?parent=27850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/categories?post=27850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phongvu.vn\/cong-nghe\/wp-json\/wp\/v2\/tags?post=27850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}