[chanchifung]

本人第一次用DSLR
買了A350+Tamron 18-250 (A18)
試機時忘了試手動對焦
在家中試時發覺手動對焦環比變焦環更難轉
本人已肯定在A350機上設定了MF mode
本人亦試過朋友的A16的對焦環鬆很多
請問會唔會係鏡頭有問題?
支鏡可以做到自動對焦的
thanks各位

[pcdaniel]

It is normal because when you're focusing manually, following vice would be found.
1) the travalling of the focusing ring is to little for the range.
2) the internal focusing motor will also driven by the focusing ring of the lens.
the reasons state above would caused the problem you mentioned.

[chanchifung]

thanks for your explanation
唔該晒

[impala]

這是絕不正常，如果對焦環緊過變焦環，你是無法準確對焦的。
在sony相機機身連接鏡身附近，用左手手指公才能設定該af/mf模式，都設定在mf模式，機身對焦摩打連桿應會放鬆，無阻力的。
你可將鏡頭不裝上機身情況下，旋轉對焦環，看有否阻力，就知道是機身問題，定鏡頭問題。