{"id":1552,"date":"2021-05-03T20:10:48","date_gmt":"2021-05-03T13:10:48","guid":{"rendered":"http:\/\/vietweather.com\/?p=1552"},"modified":"2021-05-03T20:10:48","modified_gmt":"2021-05-03T13:10:48","slug":"huong-dan-chup-dai-ngan-ha-milkyway-tac-gia-bui-xuan-viet","status":"publish","type":"post","link":"https:\/\/vietweather.com\/index.php\/huong-dan-chup-dai-ngan-ha-milkyway-tac-gia-bui-xuan-viet\/","title":{"rendered":"H\u01b0\u1edbng D\u1eabn Ch\u1ee5p D\u1ea3i Ng\u00e2n H\u00e0 – Milkyway – t\u00e1c gi\u1ea3 B\u00f9i Xu\u00e2n Vi\u1ec7t"},"content":{"rendered":"

https:\/\/www.vietbuiphoto.com\/post\/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn-ch%E1%BB%A5p-d%E1%BA%A3i-ng%C3%A2n-h%C3%A0-milkyway?fbclid=IwAR02ekpx4BJ_sAjJ23Zh06mQMmk-O7ZOLZvtS1lPCS85bTliquC6gurYTHo<\/p>\n

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H\u01b0\u1edbng d\u1eabn ch\u1ee5p d\u1ea3i ng\u00e2n h\u00e0 – Milkyway<\/span><\/p>\n

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Milkyway lu\u00f4n l\u00e0 m\u1ed9t trong nh\u1eefng th\u1ec3 lo\u1ea1i nhi\u1ebfp \u1ea3nh \u0111\u1ea7y quy\u1ebfn r\u0169 v\u00e0 h\u1ea5p d\u1eabn v\u1edbi b\u1ea5t c\u1ee9 ai. C\u00e1i c\u1ea3m gi\u00e1c nh\u00ecn l\u00ean m\u1ed9t b\u1ea7u tr\u1eddi to\u00e0n sao v\u1edbi m\u1ed9t d\u1ea3i tr\u1eafng nh\u1edd v\u1eaft ngang qua tr\u01b0\u1edbc m\u1eb7t lu\u00f4n l\u00e0 m\u1ed9t trong nh\u1eefng \u0111i\u1ec1u l\u00e0m m\u00ecnh th\u00edch nh\u1ea5t. Tuy nhi\u00ean \u0111\u1ec3 ch\u1ee5p \u0111\u01b0\u1ee3c Milkyway l\u1ea1i kh\u00f4ng h\u1ec1 d\u1ec5 d\u00e0ng, m\u00ecnh \u0111\u00e3 t\u1eebng m\u1ea5t 12 th\u00e1ng \u0111\u1ec3 t\u1ef1 m\u00f2 v\u00e0 ch\u1ee5p \u0111\u01b0\u01a1c t\u1ea5m h\u00ecnh Milkyway \u0111\u1ea7u ti\u00ean. V\u00e0 trong b\u00e0i vi\u1ebft n\u00e0y m\u00ecnh s\u1ebd chia s\u1ebb v\u1edbi m\u1ecdi ng\u01b0\u1eddi l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ee5p \u0111\u01b0\u1ee3c m\u1ed9t b\u1ee9c h\u00ecnh Milkyway.<\/span><\/p>\n

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1. X\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m v\u00e0 \u0111\u1ecba \u0111i\u1ec3m ch\u1ee5p Milkyway<\/strong><\/span><\/p>\n

– C\u00e1i kh\u00f3 nh\u1eb1n \u0111\u1ea7u ti\u00ean khi b\u1ea1n \u0111\u1ebfn v\u1edbi th\u1ec3 lo\u1ea1i \u1ea3nh n\u00e0y \u0111\u00f3 ch\u00ednh l\u00e0 \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft. D\u1ea3i ng\u00e2n h\u00e0 c\u1ee7a ch\u00fang ta th\u00ec l\u00fac n\u00e0o c\u0169ng n\u1eb1m tr\u00ean b\u1ea7u tr\u1eddi c\u1ea3 th\u00f4i tuy nhi\u00ean kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng ch\u1ee5p \u0111\u01b0\u1ee3c. \u1ede Vi\u1ec7t Nam th\u00ec b\u1ea1n s\u1ebd ch\u1ee5p \u0111\u01b0\u1ee3c MW t\u1eeb kho\u1ea3ng th\u00e1ng 2 cho \u0111\u1ebfn th\u00e1ng 11 d\u01b0\u01a1ng l\u1ecbch. <\/span><\/p>\n

– V\u00e0o nh\u1eefng ng\u00e0y tr\u1eddi trong kh\u00f4ng c\u00f3 tr\u0103ng hay tr\u0103ng l\u1eb7n v\u00e0o l\u00fac MW m\u1ecdc ( ho\u1eb7c t\u1ed1t nh\u1ea5t l\u00e0 tr\u0103ng non v\u00e0 n\u1eb1m ng\u01b0\u1ee3c h\u01b0\u1edbng MW l\u00fac n\u00e0y ti\u1ec1n c\u1ea3nh c\u1ee7a ch\u00fang ta s\u1ebd \u0111\u01b0\u1ee3c \u00e1nh tr\u0103ng chi\u1ebfu s\u00e1ng r\u1ea5t \u0111\u1eb9p ) s\u1ebd l\u00e0 th\u1eddi \u0111i\u1ec3m t\u1ed1t \u0111\u1ec3 \u0111i ch\u1ee5p MW. <\/span><\/p>\n

– B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng nhi\u1ec1u app kh\u00e1c nhau nh\u01b0 Stellarium (PC, Phone ); Starwalk 2 (Phone ) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m MW m\u1ecdc v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 kh\u00e1c nh\u01b0 th\u1eddi gian tr\u0103ng m\u1ecdc….<\/span><\/p>\n<\/div>\n

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H\u01b0\u1edbng d\u1eabn x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m ch\u1ee5p MW t\u1ea1i trang web <\/em>https:\/\/stellarium-web.org\/<\/u><\/em><\/a><\/span><\/p>\n<\/div>\n<\/div>\n

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– Sau khi bi\u1ebft \u0111\u01b0\u1ee3c th\u1eddi gian ch\u1ee5p MW ok ch\u00fang ta s\u1ebd ti\u1ebfp t\u1ee5c \u0111i t\u00ecm \u0111\u1ecba \u0111i\u1ec3m ch\u1ee5p. \u0110\u1ecba \u0111i\u1ec3m th\u00edch h\u1ee3p \u0111\u1ec3 ch\u1ee5p MW ph\u1ea3i l\u00e0 \u1edf n\u01a1i \u00edt b\u1ecb \u00f4 nhi\u1ec5m \u00e1nh s\u00e1ng v\u00e0 c\u00e0ng \u00edt b\u1ecb \u00f4 nhi\u1ec5m s\u00e1ng th\u00ec \u1ea3nh s\u1ebd c\u00e0ng \u0111\u1eb9p. C\u00e1i sai c\u1ee7a nhi\u1ec1u b\u1ea1n m\u1edbi b\u1eaft \u0111\u1ea7u ch\u1ee5p MW l\u00e0 ng\u1ea1i di chuy\u1ec3n xa n\u00ean ch\u01b0a c\u00f3 \u0111\u01b0\u1ee3c darksite c\u1ea7n thi\u1ebft v\u00e0 d\u0129 nhi\u00ean l\u00e0 ch\u1ee5p kh\u00f4ng \u0111\u01b0\u1ee3c. \u0110i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng \u0111\u1ec3 ch\u1ee5p MW l\u00e0 Bortle (thang \u0111o \u00f4 nhi\u1ec5m \u00e1nh s\u00e1ng) t\u1eeb Class 4 \u0111\u1ed5 xu\u1ed1ng v\u00e0 c\u00e0ng th\u1ea5p c\u00e0ng l\u00fd t\u01b0\u1edfng. \u1ea2nh MW ch\u1ee5p t\u1eeb khu v\u1ef1c Bortle 2 s\u1ebd kh\u00e1c bi\u1ec7t ho\u00e0n to\u00e0n so v\u1edbi khu v\u1ef1c Bortle 4.<\/span><\/p>\n<\/div>\n<\/article>\n<\/div>\n

\"\"H\u01b0\u1edbng d\u1eabn t\u00ecm \u0111\u1ecba \u0111i\u1ec3m th\u00edch h\u1ee3p ch\u1ee5p MW b\u1eb1ng website <\/em>www.lightpollutionmap.info<\/u><\/em><\/a><\/span><\/p>\n

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– Ngo\u00e0i th\u1eddi gian v\u00e0 \u0111\u1ecba \u0111i\u1ec3m ch\u1ee5p ch\u00fang ta c\u0169ng ph\u1ea3i xem th\u1eddi ti\u1ebft \u1edf khu v\u1ef1c \u0111\u00f3 th\u1ebf n\u00e0o c\u00f3 nhi\u1ec1u m\u00e2y m\u00f9 hay m\u01b0a gi\u00f3 kh\u00f4ng. N\u1ebfu nhi\u1ec1u m\u00e2y c\u0169ng s\u1ebd kh\u00f3 ch\u1ee5p. C\u00f2n n\u1ebfu m\u01b0a b\u00e3o th\u00ec \u1edf nh\u00e0 ch\u1edd th\u1eddi ti\u1ebfp th\u00f4i. App th\u00ec m\u00ecnh hay d\u00f9ng Windy. C\u00e1c b\u1ea1n d\u00f9ng app n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c nh\u00e9.<\/span><\/p>\n

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2. Nh\u1eefng thi\u1ebft b\u1ecb c\u1ea7n s\u1eed d\u1ee5ng khi ch\u1ee5p Milkyway:<\/strong><\/span><\/p>\n

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– M\u00e1y \u1ea3nh<\/em><\/strong>: C\u00e1i n\u00e0y th\u00ec t\u00f9y b\u1ea1n \u0111ang c\u00f3 m\u00e1y g\u00ec d\u00f9ng m\u00e1y \u0111\u00f3 th\u00f4i. Nh\u1eefng m\u00e1y \u1ea3nh t\u1ed1t s\u1ebd gi\u00fap b\u1ea1n kh\u1eed noise t\u1ed1t h\u01a1n khi ch\u1ee5p \u1edf ISO cao tuy nhi\u00ean n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ea5t c\u1ea3 c\u00f3 r\u1ea5t nhi\u1ec1u k\u1ef9 thu\u1eadt gi\u00fap b\u1ea1n kh\u1eed noise t\u1ed1t h\u01a1n th\u1ebf n\u00ean thay v\u00ec \u0111\u1ea7u t\u01b0 v\u00e0o m\u00e1y \u1ea3nh tr\u01b0\u1edbc th\u00ec h\u00e3y \u0111\u1ea7u t\u01b0 v\u00e0o ki\u1ebfn th\u1ee9c c\u1ee7a m\u00ecnh tr\u01b0\u1edbc.<\/span><\/p>\n

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– \u1ed0ng k\u00ednh:<\/em><\/strong> C\u00e1c \u1ed1ng k\u00ednh c\u00f3 kh\u1ea9u \u0111\u1ed9 m\u1edf l\u1edbn t\u1eeb F1.8-F2.8 lu\u00f4n \u0111\u01b0\u1ee3c \u01b0u ti\u00ean khi ch\u1ee5p MW Tuy nhi\u00ean c\u00f3 m\u1ed9t s\u1ed1 l\u01b0u \u00fd khi ch\u1ecdn \u1ed1ng k\u00ednh cho th\u1ec3 lo\u1ea1i nhi\u1ebfp \u1ea3nh n\u00e0y:<\/span><\/p>\n

+ Coma: \u0110\u00e2y l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng quang sai c\u1ee7a \u1ed1ng k\u00ednh l\u00e0m cho c\u00e1c ng\u00f4i sao \u1edf g\u00f3c b\u1ecb m\u00e9o bi\u1ebfn d\u1ea1ng th\u00e0nh h\u00ecnh c\u00e1nh chim. C\u00e1c lens b\u1ecb hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y s\u1ebd kh\u00f4ng th\u00edch h\u1ee3p \u0111\u1ec3 ch\u1ee5p MW. M\u1ed9t s\u1ed1 lens m\u00ecnh \u0111\u00e3 test b\u1ecb: Sigma 24Art, Canon 24F1.4.<\/span><\/p>\n

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+ T\u1ed1i g\u00f3c: M\u1ed9t s\u1ed1 lens m\u1eb7c d\u00f9 kh\u1ea9u 2.8 nh\u01b0ng b\u1ecb t\u1ed1i g\u00f3c kh\u00e1 n\u1eb7ng. V\u00e0 nh\u1eefng lens n\u00e0y c\u0169ng ho\u00e0n to\u00e0n kh\u00f4ng th\u00edch h\u1ee3p cho m\u1ed9t shot h\u00ecnh MW \u0111\u1eb9p do ph\u1ea7n t\u1ed1i g\u00f3c s\u1ebd r\u1ea5t n\u1eb7ng khi ph\u01a1i s\u00e1ng l\u00e2u v\u00e0o ban \u0111\u00eam.<\/span><\/p>\n

+ Vi\u1ec1n t\u00edm: Ch\u1ea3 ai mu\u1ed1n m\u1ed9t t\u1ea5m h\u00ecnh m\u00e0 ng\u00f4i sao n\u00e0o c\u0169ng t\u00edm ng\u1eaft c\u1ea3. M\u00ecnh t\u1eebng b\u1ecb v\u1edbi m\u1ed9t con lens r\u1ea5t \u0111\u1eaft ti\u1ec1n l\u00e0 Sony 24GM. Khi m\u1edf kh\u1ea9u f1.4 th\u00ec sao s\u1ebd c\u00f3 m\u00e0u t\u00edm th\u1ee7y chung. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y gi\u1ea3m nh\u1eb9 khi kh\u00e9p l\u1ea1i F2.8 tuy nhi\u00ean v\u1eabn kh\u00e1 kh\u00f3 ch\u1ecbu.<\/span><\/p>\n

+ \u0110\u1ed9 m\u00e9o tr\u01b0\u1eddng \u1ea3nh: M\u1ed9t s\u1ed1 \u1ed1ng k\u00ednh kh\u00f4ng c\u00f3 tr\u01b0\u1eddng \u1ea3nh th\u1eb3ng m\u00e0 cong cong kh\u00e1 kh\u00f3 ch\u1ecbu \u0111i\u1ec3n h\u00ecnh nh\u01b0 lens Samyang 14 f2.8. N\u00f3 s\u1ebd d\u1eabn \u0111\u1ebfn vi\u1ec7c m\u1ed9t s\u1ed1 ng\u00f4i sao c\u1ee7a b\u1ea1n \u1edf ph\u1ea7n r\u00eca ho\u1eb7c trung t\u00e2m s\u1ebd b\u1ecb out n\u00e9t m\u1eb7c d\u00f9 b\u1ea1n \u0111\u00e3 l\u1ea5y n\u00e9t \u0111\u00fang. Tuy nhi\u00ean \u0111\u00e2y l\u00e0 con lens r\u1ea5t r\u1ea5t r\u1ebb c\u00f3 kh\u1ea9u 2.8 \u0111\u1ec3 ch\u1ee5p MW cho b\u1ea1n n\u00e0o mu\u1ed1n tr\u1ea3i nghi\u1ec7m. <\/span><\/p>\n

+ M\u1ed9t s\u1ed1 lens t\u1ed1t \u0111\u1ec3 ch\u1ee5p MW m\u00ecnh \u0111\u00e3 s\u1eed d\u1ee5ng qua: Sigma 14 f1.8A; Sigma 14-24 f2.8; Sony CZ 55 f1.8; Sony 12-24GM; Tamron 17-28 F2.8; Tamron 28-200 F2.8-F5.6; Tamron 28-75 F2.8.<\/span><\/p>\n

– Ch\u00e2n m\u00e1y:<\/em><\/strong> M\u1ed9t tripod t\u1ed1t lu\u00f4n l\u00e0 ng\u01b0\u1eddi b\u1ea1n \u0111\u1ed3ng h\u00e0nh \u0111\u00e1ng tin c\u1eady nh\u1ea5t cho b\u1ea1n. L\u1eddi khuy\u00ean c\u1ee7a m\u00ecnh \u1edf \u0111\u00e2y l\u00e0 \u0111\u1eebng ti\u1ebfc ti\u1ec1n mua m\u1ed9t c\u00e1i tripod t\u1ed1t v\u00e0 ch\u00ednh h\u00e3ng. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ed5i r\u1ea5t nhi\u1ec1u m\u00e1y \u1ea3nh v\u00e0 \u1ed1ng k\u00ednh nh\u01b0ng ph\u1ee5 ki\u1ec7n c\u1ee7a b\u1ea1n lu\u00f4n kh\u00f4ng thay \u0111\u1ed5i. C\u00e1c h\u00e3ng tripod c\u0169ng th\u01b0\u1eddng c\u00f3 ch\u00ednh s\u00e1ch b\u1ea3o h\u00e0nh r\u1ea5t l\u00e2u th\u1ebf n\u00ean t\u1ed1t nh\u1ea5t l\u00e0 mua ch\u00ednh h\u00e3ng \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 s\u1eeda ch\u1eefa l\u00e2u d\u00e0i. <\/span><\/p>\n

– Remote:<\/em><\/strong> Do ph\u01a1i s\u00e1ng l\u00e2u n\u00ean b\u1ea1n ph\u1ea3i c\u00f3 remote \u0111\u1ec3 h\u1ea1n ch\u1ebf t\u1ed1i \u0111a t\u00ecnh tr\u1ea1ng rung nh\u00f2e \u1ea3nh.<\/span><\/p>\n

– M\u1ea5y th\u1ee9 l\u1eb7t v\u1eb7t nh\u01b0ng h\u1eefu d\u1ee5ng nh\u01b0 d\u00e2y qu\u1ea5n s\u01b0\u1edfi len, kh\u0103n \u0111\u1ec3 lau len ….. do ch\u1ee5p bu\u1ed5i t\u1ed1i nhi\u1ec1u khi b\u1ecb \u0111\u1ecdng s\u01b0\u01a1ng tr\u00ean \u1ed1ng k\u00ednh.<\/span><\/p>\n

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3. K\u1ef9 thu\u1eadt ch\u1ee5p Milkyway<\/strong><\/span><\/p>\n

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– L\u1ea5y n\u00e9t:<\/em><\/strong> \u0110\u00e2y l\u00e0 m\u1ed9t b\u01b0\u1edbc r\u1ea5t quan tr\u1ecdng khi b\u1ea1n ch\u1ee5p MW. R\u1ea5t nhi\u1ec1u b\u00e0i h\u01b0\u1edbng d\u1eabn s\u01a1 s\u00e0i v\u1ec1 vi\u1ec7c n\u00e0y hay th\u1eadm ch\u00ed vi\u1ebft sai lu\u00f4n nh\u01b0 v\u1eb7n v\u00f2ng l\u1ea5y n\u00e9t v\u1ec1 v\u00f4 c\u1ef1c …. C\u00e1ch l\u1ea5y n\u00e9t \u0111\u00fang nh\u1ea5t s\u1ebd l\u00e0 b\u1ea1n d\u00f9ng Manual Focus sau \u0111\u00f3 zoom h\u1ebft c\u1ee1 Liveview v\u00e0 l\u1ea5y n\u00e9t v\u00e0o m\u1ed9t ng\u00f4i sao s\u00e1ng \u1edf v\u00f9ng trung t\u00e2m hi\u1ec7n l\u00ean tr\u00ean Liveview c\u1ee7a m\u00ecnh, xoay v\u00f2ng l\u1ea5y n\u00e9t th\u1eadt nh\u1eb9 t\u1eebng mm sao cho ng\u00f4i sao \u0111\u00f3 nh\u1ecf nh\u1ea5t c\u00f3 th\u1ec3. L\u01b0u \u00fd vi\u1ec7c l\u1ea5y n\u00e9t quy\u1ebft \u0111\u1ecbnh r\u1ea5t nhi\u1ec1u trong m\u1ed9t b\u1ee9c h\u00ecnh th\u1ebf n\u00ean h\u00e3y l\u1ea5y n\u00e9t th\u1eadt k\u1ef9.<\/span><\/p>\n

– T\u1eaft h\u1ebft t\u1ea5t c\u1ea3 c\u00e1c ch\u1ebf \u0111\u1ed9 nh\u01b0 Noise Reduce, HDR, ch\u1ed1ng rung …. ch\u1ee5p RAW kh\u00f4ng n\u00e9n. Color Space: AdobeRGB<\/span><\/p>\n

– White Balance:<\/em><\/strong> Set c\u1ed1 \u0111\u1ecbnh t\u1eeb 4000K-5000K. Vi\u1ec7c c\u1ed1 \u0111\u1ecbnh WB trong su\u1ed1t bu\u1ed5i ch\u1ee5p s\u1ebd gi\u00fap b\u1ea1n \u0111\u1ed3ng b\u1ed9 v\u1ec1 m\u00e0u s\u1eafc c\u1ee7a t\u1ea5t c\u1ea3 frame h\u00ecnh v\u00e0 ti\u1ec7n cho vi\u1ec7c h\u1eadu k\u1ef3.<\/span><\/p>\n

– T\u1ed1c \u0111\u1ed9:<\/em><\/strong> T\u1ed1c \u0111\u1ed9 ch\u1ee5p MW s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o ti\u00eau c\u1ef1 c\u1ee7a lens. C\u00f3 c\u00f4ng th\u1ee9c l\u00e0 500\/ti\u00eau c\u1ef1. Tuy nhi\u00ean theo tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf c\u1ee7a m\u00ecnh b\u1ea1n n\u00ean \u00e1p d\u1ee5ng 400\/ti\u00eau c\u1ef1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u00e0 ng\u00f4i sao c\u00f3 h\u00ecnh tr\u00f2n. V\u00ed d\u1ee5ng ti\u00eau c\u1ef1 b\u1ea1n l\u00e0 14mm th\u00ec b\u1ea1n ch\u1ee5p t\u1ed1c \u0111\u1ed9 l\u00e0 400\/14= 28s (ch\u1ee5p 25s cho ch\u1eafc nh\u00e9, noise c\u00f2n kh\u1eed \u0111\u01b0\u1ee3c ch\u1ee9 ng\u00f4i sao n\u00f3 m\u00e9o th\u00ec x\u1ea5u l\u1eafm)<\/span><\/p>\n

– Kh\u1ea9u \u0111\u1ed9:<\/em><\/strong> M\u1edf kh\u1ea9u l\u1edbn nh\u1ea5t c\u00f3 th\u1ec3. Tuy nhi\u00ean ph\u1ea3i l\u01b0u \u00fd l\u00e0 c\u00f3 m\u1ed9t s\u1ed1 lens s\u1ebd b\u1ecb soft hay vi\u1ec1n t\u00edm \u1edf kh\u1ea9u l\u1edbn nh\u1ea5t. L\u00fac \u0111\u00f3 b\u1ea1n ph\u1ea3i test th\u1eed v\u00e0 kh\u00e9p kh\u1ea9u l\u1ea1i m\u1ed9t \u00edt \u0111\u1ec3 tr\u00e1nh b\u1ecb quang sai. C\u00f3 v\u00e0i lens c\u00f3 kh\u1ea9u F1.4 tuy nhi\u00ean m\u00ecnh kh\u00f4ng khuy\u1ebfn kh\u00edch m\u1edf h\u1ebft c\u1ee1 v\u1ea7y v\u00ec DOF r\u1ea5t m\u1ecfng d\u1ec5 l\u1ea5y n\u00e9t sai.<\/span><\/p>\n

– ISO:<\/em><\/strong> V\u1edbi \u1ea3nh MW th\u00ec t\u1ed1c \u0111\u1ed9 v\u00e0 kh\u1ea9u \u0111\u1ed9 ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o \u1ed1ng k\u00ednh. Th\u1ebf n\u00ean ISO s\u1ebd l\u00e0 th\u00f4ng s\u1ed1 ch\u00ednh quy\u1ebft \u0111\u1ecbnh \u1ea3nh c\u00f3 \u0111\u1ee7 s\u00e1ng hay kh\u00f4ng. B\u1ea1n n\u00ean setup th\u00f4ng s\u1ed1 ISO sao cho \u0111\u1eebng leo c\u1ea1nh t\u1ed1i ( tr\u1eeb khi trong h\u00ecnh ti\u1ec1n c\u1ea3nh c\u00f3 m\u1ed9t s\u1ed1 ph\u1ea7n b\u1ea1n mu\u1ed1n \u0111\u1ec3 m\u00e0u \u0111en)<\/span><\/p>\n

 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

 <\/p>\n

\u0110\u00e2y l\u00e0 t\u1ea5m h\u00ecnh m\u00ecnh ch\u1ee5p b\u1edfi \u1ed1ng k\u00ednh Sigma 14F1.8. V\u00f9ng MW l\u00e0 v\u00f9ng s\u00e1ng c\u00f3 Histogram kh\u00e1 \u1ed5n. Ph\u1ea7n leo t\u1ed1i l\u00e0 ph\u1ea7n r\u1eebng th\u00f4ng \u1edf ph\u00eda xa. M\u00ecnh c\u00f3 th\u1ec3 \u0111\u1ec3 nguy\u00ean v\u1eady ho\u1eb7c k\u00e9o s\u00e1ng ph\u1ea7n \u0111\u00f3 l\u00ean. <\/span><\/p>\n

L\u01b0u \u00fd nh\u1ecf l\u00e0 b\u1ea1n \u0111\u1eebng ng\u1ea1i \u0111\u1ea9y ISO l\u00ean cao t\u1eeb 3200 \u0111\u1ebfn 6400 n\u1ebfu nh\u01b0 lens b\u1ea1n l\u00e0 F2.8 ho\u1eb7c F4. Noise v\u1ec1 b\u1ea3n ch\u1ea5t s\u1ebd t\u1eadp trung \u1edf v\u00f9ng t\u1ed1i nhi\u1ec1u n\u00ean \u1ea3nh c\u00e0ng nhi\u1ec1u v\u00f9ng t\u1ed1i th\u00ec c\u00e0ng nhi\u1ec1u noise ch\u1ee9 ch\u01b0a h\u1eb3n ISO cao h\u01a1n s\u1ebd noise. C\u00e1c m\u00e1y \u1ea3nh m\u1edbi hi\u1ec7n nay \u0111a ph\u1ea7n \u0111\u1ec1u l\u00e0m r\u1ea5t t\u1ed1t ngay c\u1ea3 \u1edf ISO6400 n\u00ean \u0111\u1eebng qu\u00e1 lo l\u1eafng. M\u00ecnh s\u1ebd c\u00f3 m\u1ed9t b\u00e0i ph\u00e2n t\u00edch ri\u00eang k\u1ef9 h\u01a1n \u0111\u1ec3 c\u00e1c b\u1ea1n tham kh\u1ea3o th\u00f4ng s\u1ed1 ISO th\u00edch h\u1ee3p v\u1edbi m\u00e1y \u1ea3nh c\u1ee7a m\u00ecnh. <\/span><\/p>\n

\u00a0<\/span><\/div>\n

– V\u00e0 cu\u1ed1i c\u00f9ng khi ch\u1ee5p MW h\u00e3y ch\u1ee5p nhi\u1ec1u frame. C\u00f9ng m\u1ed9t khung h\u00ecnh b\u1ea1n h\u00e3y ch\u1ee5p \u00edt nh\u1ea5t t\u1eeb 10-20 frame \u0111\u1ec3 c\u00f3 th\u1ec3 Stack l\u1ea1i nh\u1eb1m t\u0103ng chi ti\u1ebft v\u00e0 kh\u1eed Noise khi h\u1eadu k\u1ef3. Vi\u1ec7c n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 c\u00f3 m\u1ed9t t\u1ea5m h\u00ecnh MW \u0111\u1eb9p nh\u00e9. <\/span><\/p>\n

– Ngo\u00e0i ra khi \u0111am m\u00ea v\u00e0 ch\u01a1i chuy\u00ean s\u00e2u cho th\u1ec3 lo\u1ea1i n\u00e0y b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea7u t\u01b0 th\u00eam Tracker (thi\u1ebft b\u1ecb d\u00f9ng \u0111\u1ec3 tri\u1ec7t ti\u00eau chuy\u1ec3n \u0111\u1ed9ng xoay c\u1ee7a tr\u00e1i \u0111\u1ea5t b\u1ea1n c\u00f3 th\u1ec3 ph\u01a1i l\u00e2u h\u01a1n \u0111\u1ed3ng th\u1eddi gi\u1ea3m ISO xu\u1ed1ng). L\u00fac n\u00e0y b\u1ea1n s\u1ebd ph\u1ea3i ch\u1ee5p b\u1ea7u tr\u1eddi ri\u00eang v\u00e0 m\u1eb7t \u0111\u1ea5t ri\u00eang do Tracker s\u1ebd b\u00e1m theo chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ng\u00f4i sao, l\u00e0m cho m\u1eb7t \u0111\u1ea5t b\u1ecb nh\u00f2e. Tuy nhi\u00ean b\u1ea1n s\u1ebd c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u1ea3nh \u0111\u00e1ng kinh ng\u1ea1c v\u1edbi thi\u1ebft b\u1ecb n\u00e0y. <\/span><\/p>\n

4. H\u1eadu k\u1ef3: <\/strong><\/span><\/p>\n

– V\u1ec1 ph\u1ea7n h\u1eadu k\u1ef3 \u1ea3nh ch\u1ee5p MW. C\u00e1c b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o t\u1ea1i clip n\u00e0y c\u1ee7a m\u00ecnh nh\u00e9. <\/span><\/p>\n

https:\/\/youtu.be\/y-fFXwUCiLg<\/u><\/a> <\/span><\/p>\n

\u00a0<\/span><\/div>\n

M\u1ed9t s\u1ed1 h\u00ecnh \u1ea3nh Milyway do m\u00ecnh th\u1ef1c hi\u1ec7n<\/span><\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

https:\/\/www.vietbuiphoto.com\/post\/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn-ch%E1%BB%A5p-d%E1%BA%A3i-ng%C3%A2n-h%C3%A0-milkyway?fbclid=IwAR02ekpx4BJ_sAjJ23Zh06mQMmk-O7ZOLZvtS1lPCS85bTliquC6gurYTHo   H\u01b0\u1edbng d\u1eabn ch\u1ee5p d\u1ea3i ng\u00e2n h\u00e0 – Milkyway Milkyway lu\u00f4n l\u00e0 m\u1ed9t trong nh\u1eefng th\u1ec3 lo\u1ea1i nhi\u1ebfp \u1ea3nh \u0111\u1ea7y quy\u1ebfn r\u0169 v\u00e0 h\u1ea5p d\u1eabn v\u1edbi b\u1ea5t c\u1ee9 ai. C\u00e1i c\u1ea3m gi\u00e1c nh\u00ecn l\u00ean m\u1ed9t b\u1ea7u tr\u1eddi to\u00e0n sao v\u1edbi m\u1ed9t d\u1ea3i tr\u1eafng nh\u1edd v\u1eaft ngang qua tr\u01b0\u1edbc m\u1eb7t lu\u00f4n l\u00e0 m\u1ed9t trong nh\u1eefng […]\n","protected":false},"author":1,"featured_media":1558,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[41,37,40,1,35],"tags":[],"_links":{"self":[{"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/posts\/1552"}],"collection":[{"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/comments?post=1552"}],"version-history":[{"count":1,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/posts\/1552\/revisions"}],"predecessor-version":[{"id":1559,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/posts\/1552\/revisions\/1559"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/media\/1558"}],"wp:attachment":[{"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/media?parent=1552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/categories?post=1552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vietweather.com\/index.php\/wp-json\/wp\/v2\/tags?post=1552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}