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作者 ASKA 在 PTT [ DSLR ] 看板的留言(推文), 共671則
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3F→: 畫圖用三角函數推02/13 17:10
4F→: https://zh.wikipedia.org/zh-hant/%E8%A6%96%E8%A7%9202/13 17:11
6F→: 以你例子就是算出 800mm @35mm 對角視角約 3.1度02/13 17:16
7F→: 50mm @35mm 視角46.8度02/13 17:17
9F→: 算出來是0.12倍 所以你就切長寬都 x 0.12 就是800mm的感覺02/13 17:20
10F→: 剛剛快速推公式就是 2* tan(目標視角) / tan(參考視角)02/13 17:22
101F→: 不用跳 直接加買11/03 18:13
25F→: 以前沒那些設備是因為科技不夠啊 = = 真的要搞應該是出台科10/21 23:35
26F→: 技配備滿點的底片機才對...10/21 23:35
27F→: 例如搞底片+縮圖記憶卡或是底片下面可以印時間地點10/21 23:36
28F→: 曝光資料之類.... (物理exif概念)10/21 23:37
52F→: 建議... iPhone 12 Pro Max (逃10/19 17:51
16F→: Letter box等於掉垂直解析度 人眼對垂直比對水平解析度敏感08/19 01:52
17F→: 以前科技沒這個發達時,DVD就是用類似方式來塞影像,類似這08/19 01:53
18F→: 種原理... 影片720x480 播放時拉成 854x480 (16:9)08/19 01:54
37F→: 數位用也是有好處。正常拍影片16:9也是切上下 (CMOS大多3:2)08/20 04:21
38F→: 但是應該需要配合機身韌體才能達到(i.e. 要能紀錄全部像素08/20 04:22
39F→: 同樣壓1080p,就是比直接切拍16:9的多點垂直資訊,資料量多08/20 04:23
40F→: 壓出來的效果也會比較好...08/20 04:24
41F→: 基礎上還是基於人類對垂直解析度比對水平敏感...08/20 04:25
4F→: 放天燈不知道有沒有管制。不然偽裝成天燈 (誤02/13 18:02
44F→: 如果 A7iii 能掛 Canon logo 就完美了 (X11/26 09:06
152F→: 建議去買 iPhone Xs max 512G (X09/27 18:54
83F→: 我覺得現在不要再買 DSLR 了。感覺 CN 這兩家大廠已經開始放09/27 00:03
84F→: 生... 畢竟 DSLR 是當初科技不夠下的產物09/27 00:03
68F→: 先測信仰 應該可以賣得不錯09/03 01:21