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Pentax smc DA 50-200mm f/4.0-5.6 ED

	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。使用了一個或更多的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。

資料紙
評語
用者評語
配件
圖例

Pentax smc DA 50-200mm f/4.0-5.6 ED 技術規格

Pentax smc DA 50-200mm f/4.0-5.6 ED 技術規格
可用的接環	Pentax K
應用	人像, 風景, 野外
類目	遠攝變焦
倍增器	1.5×
穩定器	否
焦距	50 - 200 mm (4× 變焦)
鏡片組	10 群組含有11 元素
視角	35毫米: 不適用數碼: 31.5-8.1°
葉片數目	6
最大光圈	廣角: f/4 遠攝: f/5.6
最小光圈	廣角: f/22 遠攝: f/32
最短焦距	110 cm
放大	不適用
濾鏡大小	52 mm
大小	∅ 66.5 × 78.5 mm
重量	260 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	是
硬機殼	不適用
軟機殼	不適用
遮光罩	PH-RBB52 (包含) 可印刷的遮光罩
三腳架接合器	不適用

Pentax smc DA 50-200mm f/4.0-5.6 ED 評語

Other reviews

Pentax smc DA 50-200mm f/4.0-5.6 ED 評語在www.ephotozine.com (英文)

Pentax smc DA 50-200mm f/4.0-5.6 ED 用者評語

亞瑪遜內最有用的用家評語

Great lens for the price

8 February 2007

If you have the 18-55mm kit lens, then you'll find that the 50-200mm feels just about the same. This lens is slightly heavier and slightly longer than the 18-55mm, but still very easy to handle. I uploaded two images to the user gallery above, showing the 18-55mm next to the 50-200mm.

Most people seem to decide between this lens or the Tamron AF70-300mm F/4-5.6, which is similarly priced. After doing a lot of research, I decided on the Pentax 50-200mm because of its compact size and much lighter weight. Although I haven't used the Tamron lens myself, the specifications show that it is longer and twice as heavy as the Pentax.

Another thing to consider is that the Tamron AF70-300mm has a 62mm filter diameter, while the Pentax DA 50-200mm and DA 18-55mm share the same 52mm filter diameter. If you already own the 18-55mm kit lens, you'll be able to use any filters that you already have on the 50-200mm. In my experience, larger filters also cost a bit more, so sticking with 52mm filters would mean cheaper filters that you can also share between lenses.

If you've never used a telephoto lens like this one (and I hadn't), then you'll find that slight movements are really exaggerated when you're fully zoomed in. Also, at 200mm, the widest aperture setting is f5.6 (smaller f-number means a bigger aperture), which is fine if you're outdoors and there's plenty of light, but can make indoor/low light photography a bit difficult. Shake reduction will definitely help, but you'll probably want a tripod if you're shooting at 200mm in low light.

Keep in mind that the Pentax DSLRs like the K100D have a 1.5x focal length multiplier. This means that you need to multiply the specified focal lengths of the lenses by 1.5 to get their 35mm SLR equivalent. On a digital SLR, this lens will give you the equivalent of 75-300mm on a regular 35mm SLR camera.

Overall, this is a great lens for the price.

Nice, small tele-zoom

27 July 2006

This 50-200 is the best in its class for any Pentax digital SLR. It's very small, light weight, internal focusing, and allows on demand manual focusing. If you haven't purchased your K100D yet, you can probably find this in a two lens kit at a nice little discount.

The "on demand" manual focus (also on the kit 18-55), allows you to instantly teak the focus after the autofocus has locked on the subject. This is very handy, as the camera may pick a person's shoulder rather than eyes on which to focus, etc. A very effecient lens hood is also included.

If you already have one of the digital SLR Pentax cameras, and if size is not critical, you might consider a long focal length lens. Pentax doesn't really have a good option (as of this writing); therefore, I'd recommend the Tamron 70-300 LD Di zoom. It'll give you 50% more range, a 1:2 lifesize close-up mode, and a 6 year USA warranty (vs. 1 year from Pentax). This brand new design features Low-Dispersion glass and is designed to work better than previous designs with digital sensors.

Exciting Lens from Pentax

21 September 2005

I found this lens to be of very high quality. Small, light, and well built. Love the fast focus capabilities and the quick shift focus that takes you to manual from auto with just a twist of the focus ring. Color and contrast are good. Great lens for the price I paid on Amazon. I've had tons of fun with this versatile Pentax lens on my *ist DS. I highly recommend this lens to all digital *ist owners. Thank you Amazon for the great price and next day delivery. Another satisfied Pentax and Amazon customer.

Amazing quality for the price

16 September 2005

Having just entered the modern era of digital SLR's I'm completely pleased with the quality, convenience and design of this lens. I had taken some air show and portrait shots but I felt the real test came at the inaugural IRL road course race at Infineon Raceway this summer. The lens behaved without flaw both in and out of the sun as I panned through turns three, four and five. A must have for any *ist owner.

Best at this size and price

28 September 2006

This is certainly not the best telezoom money can buy, not even within the Pentax family. However, you will not find anything approaching at this size and price.
It is barely bigger than the kit lens, that is, very small, especially considering its zoom range.
It is ridiculously cheap for a lens of that type and quality.
Finally the image quality is great for a lens of that type. Check forums, pbase, etc. for pictures taken with that lens ! It's amazing ! It maybe a bit slow especially at the long end, but thanks to Pentax dslr's great performance at high iso, and shake reduction in the K100D, even 200mm f/5.6 is not a problem !
Together with the kit 18-55 it is the perfect startup combo. You can then add various primes or more expensive zooms as needed (or lusted) for added speed and quality...

Oh, and at the moment it is in fact the _only_ telezoom you can get new from Pentax !-)

Pentax smc DA 50-200mm f/4.0-5.6 ED 圖例

Pentax smc DA 50-200mm f/4.0-5.6 ED 配件

遮光罩Pentax smc DA 50-200mm f/4.0-5.6 ED

Pentax PH-RBB52 Lens Hood for DA 50-200mm Lens 29.99 USD

52 mm 濾鏡

52 mm 極化濾鏡

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