APS-C大小的影像可產生APS-C大小影像的鏡頭只屬數碼屬性,它們不可使用於比APS-C 格式更大的影像接收器,也不適用於菲林相機。 無超聲波自動對焦一般來說,超聲波對焦鏡頭比傳統對焦鏡頭靜和快。 無使用低散光度鏡頭元素低散光度鏡頭元素能減低彩色的色差。 不穩定影像穩定器能減低手震時產生的模糊影像,特別在長焦距或陰暗情況下。根據倒數的定律,影像穩定化比無影像穩定鏡頭能有1到3個光圈優點。 金屬接腳平價鏡頭通常會使用塑膠接腳,而較昂貴的專業的鏡頭會使用金屬接腳。一般來說,金屬接腳會比較耐用的及當鏡頭改變很多。當相機主要使用一個鏡頭,接腳物料並不是很重要。 無內置對焦內置對焦鏡頭不會因設定焦點而改變其大小。 轉動前鏡頭固定前鏡頭在變焦及/或對焦時不會轉動,故可容許攝影師用花瓣狀遮光罩,固定前鏡頭能更容易利用極化濾鏡。 無插入濾鏡支援插入濾鏡使用於那些前鏡頭過大或視野不容許於鏡頭前傳統濾鏡的鏡頭。通常遠攝及超廣角鏡頭支援這類濾鏡。 |
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| 可用的接環 | Canon EF, Nikon F, Pentax K, Sony / Minolta A, FourThirds, Sigma |
| 應用 | 人像, 近攝, 風景, 建築物 |
| 類目 | 標準變焦 |
| 倍增器 | 1.5× |
| 穩定器 | 否 |
| 焦距 | 18 - 50 mm (2.8× 變焦) |
| 鏡片組 | 8 群組含有8 元素 |
| 視角 |
35毫米: 不適用 數碼: 69.3-27.9° |
| 葉片數目 | 7 |
| 最大光圈 | 廣角: f/3.5 遠攝: f/5.6 |
| 最小光圈 | 廣角: f/22 遠攝: 不適用 |
| 最短焦距 | 25 cm |
| 放大 | 0.29× |
| 濾鏡大小 | 58 mm |
| 大小 | ∅ 67.5 × 62 mm |
| 重量 | 250 g |
| 記錄 |
|
| 自動對焦速度 | 0.3 項 (由近攝到無限遠) |
| 自動對焦聲音 | |
| 內置對焦 | 否 |
| 內置變焦 | 不適用 |
| 固定前鏡頭 | 否 |
| 接駁類型 | 鐵 |
| 天氣密封 | 不適用 |
| 插入濾鏡 | 否 |
| 超聲波自動對焦 | 否 |
| APS-C大小的圈 | 是 |
| 低散光度鏡頭元素 | 否 |
| 硬機殼 | 不適用 |
| 軟機殼 | 不適用 |
| 遮光罩 |
LH730-02 可印刷的遮光罩 |
| 三腳架接合器 | 不適用 |
8 December 2005
I purchased this lens to use with my Olympus E-500 body. I was skeptical as to the image quality because of the low price. I'm glad I decided to give it a try. It takes excellent sharp pictures. I would highly recommend it!
14 May 2007
I saw the price of this lens and I was alittle skeptical. I read the the person's review of this lens, so I decided what do I got to lose and bought it. This is an amzing lens for the price I paid for. I'm really pleased with the results of the photos. I recommend this lens to anyone who is on a budget. You will be suprised when you see your photos.
15 September 2007
I bought this after reading the other reviews on this item. I AM NOT disappointed. It may be a little slow, but for closeup shots of flowers, insects, etc., I was overwhelmed. The detail and color were amazing. I bought my EVOLT 500 with two bundled lenses, and was disappointed with both of them. This makes up for it. I'll be looking at other Sigma lenses from now on. For the price, it's unbeatable.
30 October 2007
I give this Sigma lens a five star.
This Sigma lens is a improvement than the Olympus E300 Packaged lens I got from: Zuiko 14-45mm f/3.5-5.6 Digital SLR Lens.
I get sharper and clearer pictures then the Zuiko lens I got with my Camera.
Thank You and Merry Christmas