[canlaymen]

我買支Sigma 24-70 走焦, 去Cal 了一次, 改善了, 但尚未得, 還發現走焦的情況不規則, 時近時遠, 無法用7D的微調解決, 只有再拿去Cal,

第二次去, Sigma 的職員check 了一陣出來, 說24mm同70mm的走焦情況相反, 不大正常, 我問他其他焦距位置情況如何, 說他們只會check 24mm及70mm的位置, 中間不會check. 並建議我拿部7D去Canon 檢查有沒有問題!!
我說我的canon 正廠鏡沒有走焦問題, (我的Canon 18-55及現在的Tamron 18-250都無此問題), 他沒有正面回答我的問題.

我再問他有沒有試過把支鏡放在他們另外的機身試, 或把另外一支24-70放在我的7D來試, 他亦沒有正面答我問題. 只說鏡要跟機, 讀數會不同... 然後又拿入去再check一陣, 出來便說走焦3cm. 要放下cal. 約兩個星期叫我去取回, 我取回家後再check, 當然沒有解決問題, 仍然有不規則走焦情況.

各位有沒有類似情況? 會是鏡的問題還是機的問題? 我有否必要先去Canon check我的7D?

謝謝指點.

[vdo]

走焦3cm？相信師兄打錯字，或許是3mm吧。
多口一句，呢支鏡… 我都cal過3次，cal到我都冇癮，用唔夠四個月就賣掉！唉~
小弟全屋只得一支SIGMA定焦，就係50.4
自己唸…

[canlaymen]

vdo兄, 職員的確說3cm, 我忘了他說是近了3cm定遠了3cm.

我唔信邪, cal 唔到我會去消委會. 我email去過日本原website, 佢地有回覆我, 叫我去cal. 雖然是客套說話, 但咁大間國際企業, 還說24-70得了什麼什麼獎, 走焦就不可以容忍!

如果是Sigma engineering design有問題而常有走焦, 佢地應該正視此問題! 不可以賣 "次貨" , 仲學人拿獎!

越寫越火... 對不起! :p

[Vincent815]

我對死馬鏡已經死心。支支都走焦向前3至4cm。浪費時間上CS。永無答案。

[zotosuper]

上次拎左支30.4上去cal, 個師父都話:"盡量"幫你cal返惦", 又有話canon而家新機有微調功能, 影響唔大..心諗係鏡本身個問題! 賣次貨不凸止仲要比5舊水去維修...真係老屈..

[xx26498596]

我用d90都cal左三次都唔得呀
最後我都係放左入番原裝n24 -70

[canlaymen]

我是新仔. 不知行情. 其實有無人去過消委會投訴?

[orabuln]

快d 放左佢... 入 2470L 啦... 都有機會走焦... 但易解決好多...

[h0001244]

I can say that I am Old Hand dueling with Sigma

I brought one prime Sigma to Cal before, their answer was MFD farther than normal and Infinity closer than normal..... they said that there is no way to fix both end problem, they asked me to choose MFD or infinity......
Originally I choose infinity, as close objects can be tuned with my body movement. I asked them to ask Japan Technical Department to solve the problem. Of course, you know their official answer is they will try their best. Not surprisingly, after few days they reply that there is no way to fix the problem. I replied them " I will sacrifice my lens in front of all press eg. those popular magazine, telling them how s-u-c-k the lens Sigma has made" Sigma immediate apologized and ask Japan again. In next day, they told me that Japan has just given a software to them to cal....(of course, this programme should be here for years already)... I cal it and fixed the problem.