[barryw]

昨天買了 KM D5D. 回家做 Dead Hot Pixel Test.

用 default value threashold of hot pixel = 60

1/60 Sec Hot Pixel = 0, Dead Pixel = 0
1/30 Sec Hot Pixel = 0, Dead Pixel = 0
1/15 Sec Hot Pixel = 0, Dead Pixel = 0
1/8 Sec Hot Pixel = 0, Dead Pixel = 0
1/4 Sec Hot Pixel = 11, Dead Pixel = 0

用 threshold for hot pixel = 30

1/60 Sec Hot Pixel = 0, Dead Pixel = 0
1/30 Sec Hot Pixel = 0, Dead Pixel = 0
1/15 Sec Hot Pixel = 1, Dead Pixel = 0
1/8 Sec Hot Pixel = 7, Dead Pixel = 0
1/4 Sec Hot Pixel = 26, Dead Pixel = 0

可以接受嗎? 要不要換呀?

謝!

[barryw]

Sorry. 原來我用錯 ISO. 以上的 Test. 是 ISO800 的. 有 Noise 是正常.

我用 ISO200.
無論 Threshold 是 60 or 30. 由 1/60 至 1/4 sec. Hot pixel 和 Dead pixel 也是 0.

[peterchan04]

1/4 sec 應該冇.

"go into a dark room, turn off the LCD monitor, cover the lens, and make exposures of 1/4, 1/2, 1, 2, and 4 seconds. "


google 番來既test, 試既時間要長些. 有d 人用 30sec.