[dleung23]

本人用5D2, 想入sigma 12-24mm / canon 17-40mm, 請給意見.
另有冇Ching有同一環境用這兩支鏡影的相以供參考,thanks!

[siusiusiusun]

好難有人會同時有呢兩支
睇過網上好多SAMPLE, SIGMA果支比較鬆散, 1代變形控制好得.
2代變形控控差左, 好似1740 同1635 咁, 但就比1代色實少少.
12MM 係得SIGMA 有, 不過光圈好細, 即係D 鏡片丁屎咁細塊

1740 變形控制一般, L鏡色彩, USM對焦快. 但同1635一樣, 中間SHARP 但周圍點收都唔夠實.

[h0001244]

If you have lens of 24mm above say 24-105, why not go for 12-24 to reduce the overlapping of focal length.
In ultra wide, 1mm could be a difference, 5mm could be huge differences.
Aperture is small, but it's only 1 stop slower than 17-40, boosting 1 step ISO is not a problem for 5D2. And mostly you will use it to take landscape I supposes. Day time, low ISO. Night time, tripod.

[dleung23]

I use Tarmon 28-75.....by the way ,sigma mark 1 or mark 2 better? mark 1 is EX but I think it is not easy to buy now (i guess).

[orabuln]

http://linojang.pixnet.net/blog/post/3949957-%E6%88%91%E7%9A%84%E8%B6%85%E5%BB%A3%E8%A7%92%E9%9B%99%E4%BF%A0%EF%BC%88sigma-8-16mm-f-3.5-4.5-vs-tokina-12-

之前都上網搵過sample...

參考下...
APS 8mm (12mm) vs 12mm(18mm)

[h0001244]

Sigma said that they omit the EX in the new version because they want to re-define EX.
EX should have fixed apeture on zoom, therefore 12-24 4.5-5.6 omitted EX lor......
The image quality is better in generation II

[dleung23]

Thanks all ching first，其實自己都上網找過資料，不過都是1代的料多，他的（散景）都幾.....，2代又真是OK d, 多謝其他ching的補充資料，由其意見最有用。
re 豹兄：真是可惜啊！有金圈靚仔很多啊! 2代個樣.....

[h9981641]

我有12~24第二代，當F8~11時係最利，收光圈黑角並非嚴重，但要接受其边位變形，但只有呢支鏡才可做到12mm，應該別無選擇，但都幾貴。我用FF机的。

[h9981641]

http://www.photozone.de/canon_eos_ff/676-sigma1224f4556iiff

[h9981641]

http://www.photozone.de/canon_eos_ff/427-canon_1740_4_5d

[volumepower]

小弟有canon 17-40 & sigma 12-24 第一代
講色水同感光就 17-40 好D , 對焦快 , 但變形控制唔掂 , 桶狀嚴重
而12-24 真係超wide , 變形控制方面,收到14mm打後已經好直 , 不過用在FF機暗角嚴重 , 要收細光圈先好D , 收8 - 11 光圈又真係幾利