When the aperture has to close down to take a photo, a lens can shift the focus during the aperture closing. Sony and Nikon choose to mitigate this by focusing at the specified aperture. Canon chose to build more expensive lenses that does not shift focus during aperture closing which means using a poorly designed lens on Canon can result in slight mis-focuses while on the Sony/Nikon you will get in general not as good AF performance due to stopped down focus. It's just different solutions to a problem and neither methods are superior to each other, they're just different.
向上
2020-8-16 21:36:09
:^(
所以點解rf鏡 越來越大支。
如果副廠唔咁做 咪會out focus？
幻覺嚟嘅
2020-8-16 22:29:44
All Hail 原廠
:^(
我不是觀眾
2020-8-17 00:24:27
7月廿幾號 $13000入左
:^(
機都未到 買左鏡先
:^(
Ads
真心有禮
2020-8-17 01:07:29
早買平幾舊
:^(
華拉利好行唔送
2020-8-17 11:21:52
諗住入手一兩張UHS-II SD Card俾R6用
Sony Tough嘅M Series夠唔夠做