[wallacechan]

有一些關於雜訊還是亮點的問題請各位大大指教。我買部機時，試影過冇亮點和死點。今日賣機時，買家試我部機，用ISO 200 + 15" 影第一張相就發現有亮點。因我買機時用快門(1/60)影全黑色相試亮點，於是我回家用DeadPixelTest (w/ default setting) 去Check. 有以下發現。

- ISO 唔同亮點唔同 (PICT001有亮點 and PICT0014冇亮點)，
- Noise Reduction + ISO 唔同有唔同亮點 (PICT0001 and PICT0004)。

Filename 光圈 快門 ISO NR 亮點 亮度 座標
PICT0001 F2.8 15" 200 On 10 66-191 (1070-1,1935-36),
(1050-52,2167-8)
PICT0002 F2.8 1" 100 Off 0
PICT0003 F2.8 4" 100 Off 1 62 (2222,330)
PICT0004 F2.8 15" 100 Off 7 62-160 (420,159),
(2222-3,329-30),
(512,1096-7)
PICT0005 F2.8 1" 100 On 0
PICT0006 F2.8 2" 100 On 0
PICT0007 F2.8 3"2 100 On 0
PICT0008 F2.8 4" 100 On 0
PICT0009 F2.8 5" 100 On 0
PICT0010 F2.8 6" 100 On 0
PICT0011 F2.8 8" 100 On 0
PICT0012 F2.8 10" 100 On 0
PICT0013 F2.8 13" 100 On 0
PICT0014 F2.8 15" 100 On 0

各位大大，究竟這些是雜訊還是亮點? 正常應用怎麼設定試亮點和死點? 需唔需要用十秒以上曝光去試? 各位大大可否用F2.8 15" ISO200 影張全黑相試?有冇亮點，多謝各位大大。

[orabuln]

想問問相機型號...

[wallacechan]

Dimage A200，請各位大大比D意見，謝謝！

[kingkonghk]

如果係死/亮點, 任何一個SETTING都會有, 唔會時有時冇

[Obi-Wan]

wallacechan, I have used 7Hi, have similar problems as your, some of the issue is related to HOT PIXELS, but when I upgrade the firmware, the bright dot disappeared!

[d2c]

會員戶口已被刪除，資料已被標示為不顯示

[d2c]

會員戶口已被刪除，資料已被標示為不顯示

[wallacechan]

Thanks Obi-Wan. If it is caused by the firmware, where can I find the firmware for A200? Many thanks.

Anyway, what setting should we use to test the dead/bright spots of digital cameras? Or what setting you are using?

[wallacechan]

d2c, thanks for your advice! But I would like to know the cause and what's the problem rather than get it sell.

Actually, I told my wife that the camera have bright spot and cannot sell. Wow, I can keep it now!! :P