[man1458]

咩鏡都有優缺點，用得開心又稱心味得o羅，我連一支廠鏡都冇，用緊3支sigma，12-24 24-60 80-400OS，幾好呀，特別係12-24，當安上菲林機後就會覺得更正，唔洗抹黑副廠，又唔好以為原廠係最好，問一問自己嘅技術到位未呀??仲未!!就努力去學技術啦！

[gaiuswong]

各人有各人既意見,佢都係講出自己既睇法嗟,亦都好似無人提過原廠係一定最好,好過副廠云云,唔使咁激動喎,又唔好講到抹黑副廠咁炎重,自己用得開心咪得囉,使乜理人.

[letni]

man1458: 支80-400 好唔好用? 對焦會唔會慢到頂唔順? 會唔會慢到錯過鏡頭? os 有幾勁? 會唔會重到頂唔順?
雖然好多問題, 希望幫幫手! 因為好想買呢支!

[gaiuswong]

測試防震效果好似好過Nikon支小小,差在呢支鏡冇HSM.

[genewch]

I saw some sample photos from the people in this board. I didn't find a serious "yellowing" problem on Sigma lenses. Since different people have different perception to colours, this problem remains an unanswered question forever. More importantly, we have to respect everyone's opinions, and shouldn't make personal attack.

For interest: are there any dark corners on Sigma 12-24mm on film and digital SLR? If I add a front filter, will I get dark corners? I'm interested in this lens, and I've been struggling to choose between it and Canon 17-40mm.

[derekchu]

今日借左最新的Sigma18-50 F2.8，用落我部300D度，日光下影建築物冇乜偏黃，但白色唔夠白。

影綠色野就大獲，D草果然黄唔黄, 綠唔綠咁.
To be fair, 我用manual white balance的.

如果對顏色還原要求高，此鏡問心講真係麻麻地。

[tsang1293]

我以前也遇過鏡頭偏色的問題，買過一支適馬廣角鏡偏青，另有一支騰龍tele zoom偏黃，而且情況並非輕微。當時年輕的我跟本不懂分析問題的根源，現在才意識到攝影技術在這問題上是無濟於事的。

genewch:
Sigms12-24(12mm)在film機上沒有出現黑角，但可能我也沒有刻意開盡光圈，不過我整體的感覺是很sharp、很靚，體積龐大和比想象中輕(Vs size)。
另這鏡用在film機時是不能加filter的。

[wardrobe*]

我覺得係輕微偏黃,不是嚴重偏黃

[Tokina80]

man1458 :
I also want to know ur opinion on the 80-400 OS, especially the focusing speed. pls reply

[genewch]

Thank you, tsang1293. If I put on a front filter and use a film camera, will I have dark corners because the rim is also taken in the picture? Also, does Sigma 12-24mm have a constant length when zooming (no stretching and shortening)?

[man1458]

80-400os我就覺得唔錯，啞黑色又好睇，但我未用個原廠個支100-400，所以出黍嘅質素我就比較唔到，同埋冇hsm就真係好可惜，呢支鏡好札實，好似舊磚噤，舉起佢嚟影相係力量o既表現，不過長期操作真係手軟架!!

[letni]

man1458:
咁對焦會唔會慢到頂唔順? 對焦速度可以接受否?
thx!!!!!

[tsang1293]

genewch:

Yes. The rim must be removed when the lens is used on film cameras.

Yes. The lens barrel has a constant length.

[man1458]

我未玩過原廠，我唔知廠個D普通鏡咩速度，但對焦速度會唔會慢到頂唔順，又唔係太差，但同支12-24hsm比，大約係坐巴士同坐小巴比，慢三分一到啦，我話感覺咋!!應該唔會差過tamron囉!!

[letni]

咁都好夠wor, 以80-400 ge價格, 好抵玩