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。 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。 |
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| 可用的接環 | Sony / Minolta A |
| 應用 | 人像, 近攝, 風景, 野外, 建築物 |
| 類目 | 標準變焦 |
| 倍增器 | 1.5× |
| 穩定器 | 否 |
| 焦距 | 18 - 250 mm (13.9× 變焦) |
| 鏡片組 | 13 群組含有16 元素 |
| 視角 |
35毫米: 75,55° 數碼: 6,38° |
| 葉片數目 | 7 |
| 最大光圈 | 廣角: f/3.5 遠攝: f/6.3 |
| 最小光圈 | 廣角: f/22 遠攝: 不適用 |
| 最短焦距 | 45 cm |
| 放大 | 0.29× |
| 濾鏡大小 | 62 mm |
| 大小 | ∅ 75 × 86 mm |
| 重量 | 440 g |
| 記錄 |
|
| 自動對焦速度 | 不適用 |
| 自動對焦聲音 | |
| 內置對焦 | 不適用 |
| 內置變焦 | 不適用 |
| 固定前鏡頭 | 不適用 |
| 接駁類型 | 不適用 |
| 天氣密封 | 不適用 |
| 插入濾鏡 | 不適用 |
| 超聲波自動對焦 | 否 |
| APS-C大小的圈 | 是 |
| 低散光度鏡頭元素 | 不適用 |
| 硬機殼 | 不適用 |
| 軟機殼 | 不適用 |
| 遮光罩 | 包含 |
| 三腳架接合器 | 不適用 |
21 January 2008
Short version: This is a great lens... very well made, effective, versatile, and performs impressively. A great investment for anyone wanting a lens that really can 'do it all'.
Long version: I got this lens as an upgrade from my original Sony 18-55 lens, since I wanted a lens with a little more zoom capability (and some close-up as well) without having to switch back and forth between the 18-55 for wide angle and a bulky telephoto for higher zoom.
I was worried a little bit by reviews of the similar Tamron 18-250 lens because some reviewers claimed it had slower focus times and zoom slip.
Well, with this lens, I've not noticed any difference in focusing speed or had any problem with the zoom slipping; the zoom itself is tight and the autofocus is spot-on (I have mediocre eyesight, so AF is pretty important for me). Colors are vibrant, the view is clear... everything is good with this lens so far. I'm very pleased and not at all remorseful about dropping the cash for it.
20 February 2008
My wife uses the Tamron 18-250 on her Alfa 100. The results are good no more, no less and it is difficult to focus when there is not enough contrast.
I must say I used this lens on my Minolta 7D. I got faster results with this camera but again the pictures were good, no more no less.
With the Sony 18-250 on my (new) Alfa 700, this is another story. This couple is damn fast; only in a few occasions did I have some difficulties to focus. I shot already 1000 pictures at the sea side, in mountain areas, in a desert; I am happy to report that I got accurate colors (those I actually saw) and distortion free pictures.
If you want to travel light, the couple Alfa 700/Sony 18-250 is a must. It is a kind of standard lens along with the Sony 11-18 that I rate 5 stars too.
Simply amazing.
3 May 2008
I've only had a chance to take a few hundred shots with this lens so far, but I'm fairly impressed. It's an excellent zoom lens considering the large range it covers; making it a very good "all-purpose" lens. It's clearly better than the kit lens in their overlapping range, focuses pretty quick, and offers much greater zoom, but there's still some noticeable barrel distortion at 18 to 21mm or so, and some softness and light loss at the tele end as expected. You can definately beat this lens with the right smaller range lenses or primes, but you'll pay a LOT more and have more to carry around.
19 April 2008
While many people are happy with the Sony DT 18-200 zoom lense, the DT 18-250 is even better. For just a bit more this one has stainless steel mount and longer zoom. The size is surprisingly compact almost the same size with the DT 18-200. It is an awesome lens, I am happy with mine.
24 October 2008
I got this lens for my photography business. I am very excited about not having to change lenses everytime I want to go telephoto. I can grab those precious moments without the bride or groom knowing that I am taking their picture. The one downfall on it is the noise with the autofocusing it is very noisy. The pictures are great though. I have another shoot coming up with horses and people and I think it is going to be fantastic for the shoot.