[onlinehk888]

我回來了，帶了燈上原廠檢查，佢話正常，24mm 是燈的最大輸出，105mm 會較弱但較集中，所以唔係支燈有問題，大家又覺得正確嗎？

以下是我用 105mm 影，閃光燈向天打，但手動更改支燈的變焦

將閃光燈變焦改成 24mm
[img]http://1uu.net/testphoto5/24mm.jpg[/img]

將閃光燈變焦改成 105mm
[img]http://1uu.net/testphoto5/105mm.jpg[/img]

[onlinehk888]

yung2 在嗎？

[rikota]

你是否用點測光，試下用平均測光有冇改善？或將ISO轉到自動。

[yung2]

廠商咁講唔可以話佢錯, 但依家問題係zoom完之後個光弱好多, 弱得過分.

証明有啲野計錯數, 到低係個TTL計錯數, 定測光計錯數, 定部機同副廠燈好唔夾?

或者好似rikota咁講試吓其他測光方式, 盡量排除人為錯誤,

要d廠商認真點對待問題~

[onlinehk888]

謝謝，今晚再試過

[onlinehk888]

我找了支 580ex2 再試試，分別都幾大

http://1uu.net/light/580ex2/24mm.jpg
http://1uu.net/light/580ex2/105mm.jpg

[onlinehk888]

上面是 580ex2

下面是 di866
http://1uu.net/light/di866/24mm.jpg
http://1uu.net/light/di866/105mm.jpg

[yung2]

證明你支DI866在 zoom後有輸出過弱的問題~

如果間廠話支燈本身就係咁架啦, 即是輸出準確度還很有進步的空間.

[ohpalkof]

>>>以下是我用 105mm 影，閃光燈向天打，但手動更改支燈的變焦

樓上c hing, 想問問你測試時有無預閃和於構圖前鎖定輸出?

[nornor09]

May not be true. I am using 5D2 with 24-105mm and fitted with 270EX II. I am really amazed how accurate is the exposure. I recently went with my family to "Sun Kwong" theatre. No matter I zoom in or zoom out, and no matter if the subject is fully occupying the photo or only a small corner in the picture (since I want to include more background), the camera seems able to detect the subject, and give correct exposure for every photo comes on the human face.

But 270EX Ii doesn't have auto-zoom function (only manual zoom 24mm, 50mm).

[onlinehk888]

>>樓上c hing, 想問問你測試時有無預閃和於構圖前鎖定輸出?
做過，還是一樣...