[peter_]

我支18-50 F2.8 配d7d在某d特定環境常backfocus, 我朋友的18-200配300d又係bf, 但?去sigma又話無得整, 咁即是叫人唔好買sigma.

大家的Sigma 鏡有對焦問題嗎?

[beancurdbean]

我以前支18-50/f2.8無事, 配300D

[cclee001]

My Sigma lens (70-300mm F4-5.6 APO MACRO) have backfocus problem wo~

And also, I used in 300D ar~

[tam_dominic]

It happened on my Sigma 18-50mm f2.8 lens

I have shot 2 photos at the same place and time within several seconds (ie just exchange one person in the scene).

One is sharp and the other one is out of focus.
I still don't know how to reproduce this fault.

Fortunately it seldom happen.
Happy shooting !

[Philippe]

18-50 f2.8有事
70-200 f2.8就好準

[mchan022]

我用350D 配 Sigma 18-125 and 70-300 都無問題, 我的朋友都用Sigma鏡, 未試過有事. 可能好彩啦.

[beancurdbean]

可能QC問題

[kcfong]

大部份係機既問題多

[kingkonghk]

我用過70-300, 8 fisheye, 50-500, 180 macro都冇事, 全部nikon mount

[peter_]

前兩天聽朋友說他的Sigma鏡亦有BF問題才好奇一問大家.

其實我支鏡, 要在特定環境先會BF, 例如舞台拍攝, 可能因為舞台的光暗差較大, 對焦的主體臉部範圍小及對比度較細所影響, 亦不排除與相機配合有關.

但因為我很多時要拍這類相片, 拍到BF的相片機會亦頗多, 現時影呢類照片都會轉為MF操作.

[Omega]

如果係環境及光差影響...好可能係部機的問題wor...

我用D70﹐我有4支Sigma 鏡, 全部用左超過一年:

15mm Fisheye EX
17-35mm f/2.8-4 EX HSM
105mm Macro EX
80-400 OS EX HSM

除左支17-35mm影好近好近時會有少少焦點後移之外﹐
其它鏡都完全無事。

[雞能]

18-50, 70-300, 兩支都冇事

[kingkonghk]

我都覺得關架機事

[Dericxhk]

呀....各大大....希望您地教教我...
我好想買一支18-125mm 3.5 - 5.6啊> 我用緊350d~~ 係咩度買會平d? 支鏡會唔會又有問題啊>

[Sygate]

可以去以下呢網站睇下 http://digi.163.com/06/0313/13/2C3M3CRH001618EI_5.html