{"id":7553,"date":"2026-05-02T09:42:43","date_gmt":"2026-05-02T02:42:43","guid":{"rendered":"https:\/\/nhiepanhvacongnghe.com\/?p=7553"},"modified":"2026-05-02T09:42:49","modified_gmt":"2026-05-02T02:42:49","slug":"do-net-trong-bai-test-thuc-te-trong-nhu-the-nao-trong-anh","status":"publish","type":"post","link":"https:\/\/nhiepanhvacongnghe.com\/index.php\/2026\/05\/02\/do-net-trong-bai-test-thuc-te-trong-nhu-the-nao-trong-anh\/","title":{"rendered":"\u0110\u1ed9 n\u00e9t trong b\u00e0i test th\u1ef1c t\u1ebf tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o trong \u1ea3nh?"},"content":{"rendered":"\n

B\u00e0i vi\u1ebft n\u00e0y nh\u1eb1m gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n c\u00e1c con s\u1ed1 \u0111\u1ed9 n\u00e9t<\/strong> m\u00e0 ch\u00fang t\u00f4i th\u01b0\u1eddng d\u00f9ng khi \u0111\u00e1nh gi\u00e1 \u1ed1ng k\u00ednh \u2013 c\u1ee5 th\u1ec3 l\u00e0 gi\u00e1 tr\u1ecb LW\/PH MTF50<\/strong> \u0111o b\u1eb1ng ph\u1ea7n m\u1ec1m Imatest. \u0110\u00e2y l\u00e0 l\u1ea7n \u0111\u1ea7u b\u1ea1n c\u00f3 th\u1ec3 \u201cnh\u00ecn th\u1ea5y t\u1eadn m\u1eaft\u201d nh\u1eefng con s\u1ed1 \u0111\u00f3 t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u1ea3nh th\u1ef1c t\u1ebf ra sao.<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n
\n\n\n\n

MTF50 l\u00e0 g\u00ec?<\/h2>\n\n\n\n

MTF (Modulation Transfer Function) \u0111o kh\u1ea3 n\u0103ng gi\u1eef l\u1ea1i \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n<\/strong> c\u1ee7a chi ti\u1ebft trong \u1ea3nh so v\u1edbi th\u1ef1c t\u1ebf.<\/p>\n\n\n\n

Hi\u1ec3u \u0111\u01a1n gi\u1ea3n:<\/p>\n\n\n\n

    \n
  • Test chart c\u00f3 c\u00e1c v\u1ea1ch tr\u1eafng \u2013 \u0111en ng\u00e0y c\u00e0ng m\u1ecfng<\/li>\n\n\n\n
  • \u1ed0ng k\u00ednh t\u1ed1t \u2192 v\u1eabn ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c v\u1ea1ch m\u1ecfng<\/li>\n\n\n\n
  • \u1ed0ng k\u00ednh k\u00e9m \u2192 c\u00e1c v\u1ea1ch b\u1ecb \u201ch\u00f2a v\u00e0o nhau\u201d th\u00e0nh m\u00e0u x\u00e1m<\/li>\n<\/ul>\n\n\n\n

    \ud83d\udc49 MTF50<\/strong> tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi:
    \u201c\u1ede m\u1ee9c \u0111\u1ed9 chi ti\u1ebft n\u00e0o th\u00ec \u1ea3nh v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c 50% \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n ban \u0111\u1ea7u<\/strong>?\u201d<\/p>\n\n\n\n

    \n\n\n\n

    LW\/PH l\u00e0 g\u00ec?<\/h2>\n\n\n\n
      \n
    • Vi\u1ebft t\u1eaft c\u1ee7a Line Widths Per Picture Height<\/strong><\/li>\n\n\n\n
    • Ngh\u0129a l\u00e0: c\u00f3 bao nhi\u00eau \u201cv\u1ea1ch\u201d ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c theo chi\u1ec1u cao \u1ea3nh<\/li>\n<\/ul>\n\n\n\n

      \ud83d\udc49 S\u1ed1 c\u00e0ng cao = chi ti\u1ebft c\u00e0ng m\u1ecbn = \u1ea3nh c\u00e0ng n\u00e9t<\/p>\n\n\n\n

      \n\n\n\n

      L\u01b0u \u00fd quan tr\u1ecdng<\/h2>\n\n\n\n
        \n
      • C\u00e1c \u1ea3nh minh h\u1ecda l\u00e0 crop 100%<\/strong> t\u1eeb file g\u1ed1c 45MP ch\u1ee5p b\u1eb1ng Nikon Z7<\/li>\n\n\n\n
      • Kh\u00f4ng sharpen, kh\u00f4ng ch\u1ec9nh quang sai<\/li>\n\n\n\n
      • Test chart l\u00e0m l\u1ed9 r\u00f5 kh\u00e1c bi\u1ec7t h\u01a1n \u1ea3nh th\u1ef1c t\u1ebf<\/li>\n<\/ul>\n\n\n\n

        \ud83d\udc49 Ngo\u00e0i \u0111\u1eddi: s\u1ef1 kh\u00e1c bi\u1ec7t s\u1ebd kh\u00f3 th\u1ea5y h\u01a1n nhi\u1ec1u<\/strong><\/p>\n\n\n\n

        \n\n\n\n

        M\u1ee9c \u0111\u1ed9 n\u00e9t qua t\u1eebng gi\u00e1 tr\u1ecb MTF50<\/h2>\n\n\n\n

        \ud83d\udd34 ~500 LW\/PH \u2013 R\u1ea5t k\u00e9m<\/h3>\n\n\n
        \n
        \"\"<\/figure>\n<\/div>\n\n\n

        510 LW\/PH MTF50.<\/strong> Top left corner. Zoom-Nikkor 43-86mm f\/3.5 Ai-S at 86mm, f\/3.5<\/p>\n\n\n\n

        2. 1000 LW\/PH MTF50<\/h3>\n\n\n\n
          \n
        • R\u1ea5t m\u1edd, m\u1ea5t chi ti\u1ebft<\/li>\n\n\n\n
        • Hi\u1ebfm g\u1eb7p, ch\u1ec9 th\u1ea5y \u1edf \u1ed1ng k\u00ednh r\u1ea5t c\u0169<\/li>\n<\/ul>\n\n\n\n

          <\/p>\n\n\n\n

          \n\n\n\n

          \ud83d\udfe0 ~1000 LW\/PH \u2013 K\u00e9m<\/h3>\n\n\n\n
            \n
          • \u1ea2nh m\u1edd r\u00f5 r\u1ec7t<\/li>\n\n\n\n
          • C\u00f3 th\u1ec3:\n
              \n
            • Nh\u00f2e (smearing)<\/li>\n\n\n\n
            • Ho\u1eb7c thi\u1ebfu chi ti\u1ebft (out-of-focus look)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n
              \n
              \"\"<\/figure>\n<\/div>\n\n\n

              1025 LW\/PH MTF50.<\/strong>\u00a0Top right corner. Voigtlander Nokton 50mm f\/1 at f\/1.4
              <\/p>\n\n\n

              \n
              \"\"<\/figure>\n<\/div>\n\n\n

              973 LW\/PH MTF50.<\/strong>\u00a0Bottom left corner. Nikon Z 35mm f\/1.4 at f\/1.4
              <\/p>\n\n\n

              \n
              \"\"<\/figure>\n<\/div>\n\n\n

              955 LW\/PH MTF50.<\/strong>\u00a0Lower right midframe. Zoom-Nikkor 43-86mm f\/3.5 Ai-S at 86mm, f\/3.5

              <\/p>\n\n\n\n

              \ud83d\udc49 M\u1ed9t s\u1ed1 lens v\u1eabn c\u00f3 th\u1ec3 r\u01a1i v\u00e0o m\u1ee9c n\u00e0y \u1edf g\u00f3c khi m\u1edf kh\u1ea9u l\u1edbn<\/p>\n\n\n\n

              \n\n\n\n

              \ud83d\udfe1 ~1500 LW\/PH \u2013 T\u1ea1m \u1ed5n<\/h3>\n\n\n\n
                \n
              • D\u00f9ng \u0111\u01b0\u1ee3c<\/li>\n\n\n\n
              • In \u1ea3nh l\u1edbn v\u1eabn \u1ed5n<\/li>\n\n\n\n
              • Nh\u01b0ng ch\u01b0a \u201c\u0111\u00e3 m\u1eaft\u201d<\/li>\n<\/ul>\n\n\n
                \n
                \"\"<\/figure>\n<\/div>\n\n\n
                \n\n\n\n

                1511 LW\/PH MTF50.<\/strong>\u00a0Top left corner. Voigtlander APO-Lanthar 50mm f\/2 at f\/16<\/em><\/p>\n\n\n

                \n
                \"\"<\/figure>\n<\/div>\n\n\n

                1534 LW\/PH MTF50.<\/strong>\u00a0Top left corner. Nikon Z 28-400mm f\/4-8 at 70mm, f\/8<\/p>\n\n\n\n

                \ud83d\udfe2 ~2000 LW\/PH \u2013 Kh\u00e1 n\u00e9t<\/h3>\n\n\n\n
                  \n
                • \u0110\u00e2y l\u00e0 m\u1ee9c \u201c\u0111\u00e1ng tin c\u1eady\u201d<\/li>\n\n\n\n
                • \u1ed0ng k\u00ednh t\u1ed1t hi\u1ec7n nay n\u00ean \u0111\u1ea1t \u0111\u01b0\u1ee3c<\/li>\n<\/ul>\n\n\n
                  \n
                  \"\"<\/figure>\n<\/div>\n\n\n

                  1955 LW\/PH MTF50.<\/strong>\u00a0Top left corner. Nikon Z 14-24mm f\/2.8 S at 14mm, f\/8<\/em><\/p>\n\n\n\n

                  \ud83d\udc49 N\u1ebfu \u1ea3nh \u0111\u1eb9p, b\u1ea1n g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 g\u00ec \u0111\u1ec3 ph\u00e0n n\u00e0n<\/strong><\/p>\n\n\n\n

                  \n\n\n\n

                  \ud83d\udd35 ~2500 LW\/PH \u2013 R\u1ea5t t\u1ed1t<\/h3>\n\n\n\n
                    \n
                  • Chu\u1ea9n c\u1ee7a lens hi\u1ec7n \u0111\u1ea1i<\/li>\n\n\n\n
                  • Midframe th\u01b0\u1eddng \u0111\u1ea1t m\u1ee9c n\u00e0y<\/li>\n<\/ul>\n\n\n
                    \n
                    \"\"<\/figure>\n<\/div>\n\n\n

                    2573 LW\/PH MTF50.<\/strong>\u00a0Center. Nikon Z 58mm f\/0.95 S Noct at f\/0.95
                    <\/p>\n\n\n\n

                    \ud83d\udc49 S\u1ef1 kh\u00e1c bi\u1ec7t so v\u1edbi 2000 b\u1eaft \u0111\u1ea7u kh\u00f3 nh\u1eadn ra h\u01a1n<\/strong><\/p>\n\n\n\n

                    \n\n\n\n

                    \ud83d\udfe3 ~3000 LW\/PH \u2013 R\u1ea5t s\u1eafc<\/h3>\n\n\n\n
                      \n
                    • Trung t\u00e2m \u1ea3nh c\u1ee7a lens t\u1ed1t n\u00ean \u0111\u1ea1t<\/li>\n\n\n\n
                    • M\u1ed9t s\u1ed1 lens cao c\u1ea5p \u0111\u1ea1t c\u1ea3 midframe<\/li>\n<\/ul>\n\n\n
                      \n
                      \"\"<\/figure>\n<\/div>\n\n\n
                      \n\n\n\n

                      3028 LW\/PH MTF50.<\/strong>\u00a0Center. Nikon Z 14-24mm f\/2.8 S at 20mm, f\/8<\/em><\/p>\n\n\n\n

                      \u26ab ~3500 LW\/PH \u2013 C\u1ef1c n\u00e9t<\/h3>\n\n\n\n
                        \n
                      • Ch\u1ee7 y\u1ebfu th\u1ea5y \u1edf \u1ed1ng prime cao c\u1ea5p<\/strong><\/li>\n\n\n\n
                      • Zoom b\u1eaft \u0111\u1ea7u \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u01b0ng ch\u01b0a ph\u1ed5 bi\u1ebfn<\/li>\n<\/ul>\n\n\n\n
                        \"\"<\/figure>\n\n\n\n

                        3580 LW\/PH MTF50.<\/strong>\u00a0Center. Nikon Z 58mm f\/0.95 S Noct at f\/1.6<\/em><\/p>\n\n\n\n

                        \n\n\n\n

                        \u26aa ~4000+ LW\/PH \u2013 \u0110\u1ec9nh cao<\/h3>\n\n\n\n
                          \n
                        • Ch\u1ec9 c\u00f3 \u1edf nh\u1eefng lens s\u1eafc nh\u1ea5t<\/li>\n\n\n\n
                        • Th\u01b0\u1eddng ch\u1ec9 \u0111\u1ea1t \u1edf trung t\u00e2m<\/strong><\/li>\n<\/ul>\n\n\n
                          \n
                          \"\"<\/figure>\n<\/div>\n\n\n

                          4036 LW\/PH MTF50.<\/strong>\u00a0Center. Nikon Z 58mm f\/0.95 S Noct at f\/2.8<\/em><\/p>\n\n\n\n

                          V\u00ed d\u1ee5:<\/p>\n\n\n\n

                            \n
                          • Nikon Z 58mm f\/0.95 S Noct<\/li>\n\n\n\n
                          • Nikon Z 135mm f\/1.8 S Plena<\/li>\n<\/ul>\n\n\n\n
                            \n\n\n\n

                            \u0110i\u1ec1u r\u00fat ra quan tr\u1ecdng \ud83d\udd11<\/h2>\n\n\n\n

                            1. Tr\u00ean ~2500 \u2192 kh\u00e1c bi\u1ec7t r\u1ea5t nh\u1ecf<\/h3>\n\n\n\n
                              \n
                            • 3000 vs 4000 g\u1ea7n nh\u01b0 kh\u00f4ng th\u1ea5y ngo\u00e0i \u0111\u1eddi<\/strong><\/li>\n\n\n\n
                            • Ch\u1ee7 y\u1ebfu ch\u1ec9 th\u1ea5y trong lab<\/li>\n<\/ul>\n\n\n\n
                              \n\n\n\n

                              2. D\u01b0\u1edbi 2000 \u2192 kh\u00e1c bi\u1ec7t r\u1ea5t l\u1edbn<\/h3>\n\n\n\n
                                \n
                              • 1000 vs 1500 = kh\u00e1c bi\u1ec7t r\u00f5 r\u00e0ng<\/li>\n\n\n\n
                              • \u0110\u00e2y m\u1edbi l\u00e0 v\u00f9ng c\u1ea7n quan t\u00e2m<\/li>\n<\/ul>\n\n\n\n
                                \n\n\n\n

                                3. \u201c\u0110\u1ed9 n\u00e9t s\u00e0n\u201d quan tr\u1ecdng h\u01a1n \u201c\u0111\u1ec9nh\u201d<\/h3>\n\n\n\n

                                V\u00ed d\u1ee5:<\/p>\n\n\n\n

                                  \n
                                • Lens A:\n
                                    \n
                                  • Center: 4000<\/li>\n\n\n\n
                                  • Corner: 1300<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                                  • Lens B:\n
                                      \n
                                    • Center: 3500<\/li>\n\n\n\n
                                    • Corner: 1600<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

                                      \ud83d\udc49 Lens B th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 t\u1ed1t h\u01a1n<\/strong> v\u00ec:<\/p>\n\n\n\n

                                        \n
                                      • \u1ea2nh \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n<\/li>\n\n\n\n
                                      • G\u00f3c kh\u00f4ng b\u1ecb \u201ct\u1ee5t ch\u1ea5t l\u01b0\u1ee3ng\u201d<\/li>\n<\/ul>\n\n\n\n
                                        \n\n\n\n

                                        M\u1ed9t c\u00e2u h\u1ecfi th\u00fa v\u1ecb<\/h2>\n\n\n\n

                                        Gi\u1eefa:<\/p>\n\n\n\n

                                          \n
                                        • \u1ed0ng c\u1ef1c n\u00e9t \u1edf trung t\u00e2m nh\u01b0ng y\u1ebfu \u1edf g\u00f3c<\/li>\n\n\n\n
                                        • V\u00e0 \u1ed1ng n\u00e9t \u0111\u1ec1u to\u00e0n khung<\/li>\n<\/ul>\n\n\n\n

                                          \ud83d\udc49 B\u1ea1n ch\u1ecdn c\u00e1i n\u00e0o?<\/p>\n\n\n\n

                                          T\u00e1c gi\u1ea3 nghi\u00eang v\u1ec1 \u0111\u1ed9 n\u00e9t \u1ed5n \u0111\u1ecbnh to\u00e0n khung<\/strong>.<\/p>\n\n\n\n

                                          \n\n\n\n

                                          Vai tr\u00f2 c\u1ee7a c\u1ea3m bi\u1ebfn<\/h2>\n\n\n\n

                                          \u0110\u1ed9 n\u00e9t kh\u00f4ng ch\u1ec9 ph\u1ee5 thu\u1ed9c lens:<\/p>\n\n\n\n

                                            \n
                                          • \u0110\u1ed9 ph\u00e2n gi\u1ea3i c\u1ea3m bi\u1ebfn<\/li>\n\n\n\n
                                          • Filter stack<\/li>\n\n\n\n
                                          • K\u00edch th\u01b0\u1edbc sensor<\/li>\n<\/ul>\n\n\n\n

                                            \ud83d\udc49 Lens test tr\u00ean m\u00e1y kh\u00e1c nhau \u2192 kh\u00f4ng so tr\u1ef1c ti\u1ebfp \u0111\u01b0\u1ee3c<\/strong><\/p>\n\n\n\n

                                            \n\n\n\n

                                            Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai<\/h2>\n\n\n\n
                                              \n
                                            • Lens ng\u00e0y c\u00e0ng s\u1eafc (4000+ ph\u1ed5 bi\u1ebfn h\u01a1n)<\/li>\n\n\n\n
                                            • C\u1ea3m bi\u1ebfn 45MP b\u1eaft \u0111\u1ea7u ch\u1ea1m gi\u1edbi h\u1ea1n<\/strong><\/li>\n<\/ul>\n\n\n\n

                                              \ud83d\udc49 C\u00f3 th\u1ec3 c\u1ea7n:<\/p>\n\n\n\n

                                                \n
                                              • 100MP<\/li>\n\n\n\n
                                              • 200MP<\/li>\n<\/ul>\n\n\n\n

                                                \u0111\u1ec3 t\u1eadn d\u1ee5ng h\u1ebft s\u1ee9c m\u1ea1nh \u1ed1ng k\u00ednh<\/p>\n\n\n\n

                                                \n\n\n\n

                                                K\u1ebft lu\u1eadn<\/h2>\n\n\n\n
                                                  \n
                                                • \u0110\u1eebng qu\u00e1 \u00e1m \u1ea3nh con s\u1ed1 l\u1edbn<\/li>\n\n\n\n
                                                • Tr\u00ean th\u1ef1c t\u1ebf:\n
                                                    \n
                                                  • 2500 = \u0111\u00e3 r\u1ea5t t\u1ed1t<\/li>\n\n\n\n
                                                  • Quan tr\u1ecdng h\u01a1n l\u00e0 \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 tr\u1ea3i nghi\u1ec7m ch\u1ee5p<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

                                                    \ud83d\udc49 M\u1ed9t \u1ed1ng k\u00ednh:<\/p>\n\n\n\n

                                                      \n
                                                    • Nh\u1eb9<\/li>\n\n\n\n
                                                    • N\u00e9t \u1ed5n \u0111\u1ecbnh<\/li>\n\n\n\n
                                                    • D\u1ec5 d\u00f9ng<\/li>\n<\/ul>\n\n\n\n

                                                      \u2026th\u01b0\u1eddng \u0111\u00e1ng gi\u00e1 h\u01a1n m\u1ed9t \u1ed1ng \u201csi\u00eau n\u00e9t trong lab\u201d.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                                      B\u00e0i vi\u1ebft n\u00e0y nh\u1eb1m gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n c\u00e1c con s\u1ed1 \u0111\u1ed9 n\u00e9t m\u00e0 ch\u00fang t\u00f4i th\u01b0\u1eddng d\u00f9ng khi \u0111\u00e1nh gi\u00e1 \u1ed1ng k\u00ednh \u2013 c\u1ee5 th\u1ec3 l\u00e0 gi\u00e1 tr\u1ecb LW\/PH MTF50 \u0111o b\u1eb1ng ph\u1ea7n m\u1ec1m Imatest. \u0110\u00e2y l\u00e0 l\u1ea7n \u0111\u1ea7u b\u1ea1n c\u00f3 th\u1ec3 \u201cnh\u00ecn th\u1ea5y t\u1eadn m\u1eaft\u201d nh\u1eefng con s\u1ed1 \u0111\u00f3 t\u01b0\u01a1ng \u1ee9ng v\u1edbi […]<\/p>\n","protected":false},"author":1,"featured_media":7554,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,8],"tags":[61,184],"class_list":["post-7553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","category-danh-gia-san-pham","tag-chup-anh","tag-nhiepanhvacongnghe"],"yoast_head":"\n\u0110\u1ed9 n\u00e9t trong b\u00e0i test th\u1ef1c t\u1ebf tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o trong \u1ea3nh? 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