Pentax K200D 規格表中有個特殊的功能 D-RANGE, 雖然別的廠家也有類似的功能, 但是對於 P 家而言卻是新的功能, 因此特別將 Dpreview 網站中的測試摘錄下來 :
Dynamic Range Optimization feature (Extract from Dpreview)
As you can see in the graph enabling D-Range at ISO 200 gives you approximately one stop of additional highlight range. The sample shots below demonstrate what difference this makes in real life. We exposed both shots to get some detail on the brickwork of the dark tunnel. Naturally this results in an overexposure of the buildings you can see outside. As you can see in the crops D-Range managed to recover quite a bit of highlight detail that would otherwise have been lost.
 |
 |
 |
 |
 |
 |
開啟 D-RANGE 後, ISO 選擇範圍由原本的 100-1600 變為 200-1600, 可以將輸入光線的動態範圍壓縮 200%, 以保留更多的畫面資訊(由 dpreview 的曲線圖可以看出, D-RANGE 主要作用是在亮部的部份), 看起來是很完美的功能, 測試結果好像也不錯, 但是實際的情形呢?
第一個碰到的問題在短短的三分鐘的時間之內竟然拍出下面兩張顏色迥異的照片.
