The Tamron 17-50mm f/2.8 XR Di II Lens delivers very good image quality in a small, light, fast and affordable package.
Add in the very popular focal length range and you have a lens that is just right for many
The early-in-its-lifecycle popularity this lens is enjoying substantiates this claim.
The Tamron 17-50 provides an image circle that is large enough for APS-C (1.5x/1.6x FOVCF) sized digital SLRs sensors.
Being sized for a smaller-format sensor allows a smaller design to be used.
Measuring 2.9 x 3.2" (74 x 82mm)(d x l) and weighing 15.2 oz (430g), the Tamron 17-50 is an ideal size for these smaller digital SLR bodies.
It balances and handles very nicely.
Build quality is not rugged, but it is solid - very adequate I would say.
The included hood is similarly built.
The rubber on the zoom ring is grippy, soft and deeply ribbed.
The zoom and focus rings turn smoothly.
Tamron's rear lens cap only attaches at one position - a bit of a pain since I'm used to Canon's 3 attachment positions.
Tamron's excellent center-pinch 67mm front cap more than makes up for this pain -
I've considered putting these on my Canon lenses - And many of Sigma's lenses desperately need them.
On to more important issues ...
The Tamron 17-50mm f/2.8 XR Di II Lens' AF is rather fast, but the high pitch buzz made by the focus motor is deceptive - making the lens sound slower.
I found AF accuracy to be quite good with relatively few missed shots (that were not my fault at least).
This is an internal-focusing lens - It does not change length during focusing and the front element does not rotate.
FTM (Full Time Manual) focusing is not supported.
Since the manual focus ring is rather small and in front of the larger focus ring,
I did not find the focus ring turning during autofocusing to be much of a problem.
It does turn though.
The Tamron 17-50's minimum focus distance is 10.6" (0.27m) and provides a respectable .22x magnification factor.
Both the zoom and focus rings rotate the opposite direction of Canon's lens rings.
A zoom lock switch is provided.
Positioned above from left to right in their fully retracted positions are the following lenses:
The same lenses are shown below in their fully extended states with their lens hoods in place.
The optical quality of the Tamron 17-50mm f/2.8 XR Di II Lens is excellent (especially for the price).
I find my images sharp even when wide open at f/2.8 at all focal lengths - I do not hesitate to use this lens at f/2.8.
Narrowing the aperture 1 stop or so yields slightly sharper image centers and noticeably better corners as the corners are somewhat soft wide open.
If the subject or background is an evenly-shaded solid color, you might notice slight vignetting when the lens is at f/2.8 at the wider focal lengths.
Otherwise, vignetting will not be noticeable.
Some CA (Chromatic Aberration) can be seen in real life shots, but nothing I would consider objectionable.
Flare is very well controlled.
Some barrel distortion is visible at the 17mm end.
Pincushion distortion becomes visible at 24mm and more noticeable at 35mm before lessening to the 50mm end.
Colors seem fine - neutral.
The 7-blade aperture produces pleasant out-of-focus highlights.
Of course, the first thing I wanted to do with this lens is to compare it with the
Both shown along with the Tamron in the above and below pictures.
First, the Canon 17-55 IS.
This is my at-the-time-of-this-writing always-mounted lens for my
The obvious difference between these lenses is size - as shown in the picture.
The Canon is .4" (9.5mm) wider and 1.2"(28.6mm) longer.
The weight is noticeably different as well - The Canon weighs 7.6 oz (215g) more than the Tamron.
The Canon and Tamron are similarly sharp in the center at all focal lengths.
At mid zoom range, the Canon begins showing better edge performance - becoming much better at 50mm.
Keep in mind that the Canon did not perform well on the ISO 12233 chart test -
It doesn't seem to like closer focus distances.
The Tamron 17-50mm f/2.8 XR Di II Lens shows less vignetting than the Canon.
The Tamron is more flare-resistant.
This Tamron lens' 17mm is wider than this Canon lens' 17mm.
Of course, the Canon has 5mm over the Tamron on the long end.
The Canon's biggest advantage is the 3-stop image stabilizer that the Tamron 17-50 lacks.
If your subject is not moving (or you are), this is a really nice feature.
The Canon also features fast, silent USM (Ultrasonic Motor) focusing with FTM focusing.
Perhaps the biggest difference between these two lenses is the price.
Each individual must determine if the Canon's advantages are enough to justify the very large price differential.
is very, very similar to the Tamron 17-50mm f/2.8 XR Di II Lens.
These lenses are more similar than different.
They are very similarly sized and shaped.
They function very similarly.
The differences?
The Sigma is less resistant to flare.
The Sigma shows more CA.
The Tamron is noticeably wider (17mm vs. 18mm - and even wider than the Canon with the same 17mm designation).
The Tamron focuses faster, the Sigma focuses more quietly.
The Tamron focuses much more accurately - My keeper rate is far higher with the Tamron.
My Sigma has a weak left side -
For sharpness, the Tamron beats the Sigma easily on the left side, but the Sigma is slightly better on the right.
The Sigma rings rotate the Canon direction, the Tamron rings rotate the opposite direction.
The Sigma is less expensive (but not by much).
The Sigma's requires its lens hood to be removed to install/remove the lens cap - this is a pain -
Plan to buy the Tamron cap if you purchase the Sigma lens.
I'd go with the Tamron 17-50mm f/2.8 XR Di II Lens over the Sigma.
Moving on ...
Tamron does not provide a pouch/case with this lens.
Consider a
as a nice solution to this omission.
Click on the image below to compare the Tamron 17-50mm f/2.8 XR Di II Lens to other lens models with and without hoods (opens in new window to save your place in this review).
The Tamron 17-50mm f/2.8 XR Di II Lens is available in Canon (reviewed), Nikon and Minolta mounts.
My standard disclaimer: You should be aware that there are potential issues with third party lenses.
Since Tamron reverse engineers (vs. licenses) manufacturer AF routines,
there is always the possibility that a new body might not support an older third party lens.
There are examples of this happening in the past.
Sometimes a lens can be rechipped to be made compatible, sometimes not.
Second, there is the risk of a problem that results in the lens and body manufacturers pointing blame at each other.
However, Tamron's 6-year warranty is far superior to Canon's standard 1 year warranty.
Select View:&& |
&&&w/ Hood:&& |
In the Tamron 17-50, we have a very useful tool.
Since it is small and light, we can take it everywhere.
Since it is fast (f/2.8), we can use it in low light and indoors - and to stop action.
Since it has very good image quality, we can use it for important shots.
This list along with a nice general-purpose focal length range fills the requirements of
a huge range of photographic opportunities (I'll let you think of them).
For the price, the Tamron 17-50 is a bargain lens.
Review note: Do not confuse the Tamron 17-50mm f/2.8 XR Di II Lens with the .
The older non-VC lens (this model) has superior image quality.
Bringing you this site is my full-time job (typically 60-80 hours per week). Thus, I depend solely on the commissions received from you using the links on this site to make any purchase. I am grateful for your support! - Bryan
My Recommended Tamron 17-50mm f/2.8 XR Di II Lens Retailers
Where you buy your gear matters. You expect to get what you ordered and you want to pay a low price for it. The retailers I recommend below are the ones I trust for my own purchases. Get your Tamron 17-50mm f/2.8 XR Di II Lens now from:
(Choose trustworthy sellers only)
(Using the links on this site to make any purchase provides )
Rent the Tamron 17-50mm f/2.8 XR Di II Lens
Do you need/want the Tamron 17-50mm f/2.8 XR Di II Lens for only a short period of time? Or, would you feel more comfortable buying after having a hands-on trial period? Consider renting. Renting is fast and easy. The rental companies I recommend below are excellent to work with. Schedule your rental now:
(Using these links for your rental )
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& 蜂鸟网友老马试用腾龙SP 24-70mm F/2.8
蜂鸟网友老马试用腾龙SP 24-70mm F/2.8
作者：老马识途2286
    腾龙的镜头挺亲切的，为啥？个人觉得主要是腾龙的镜头相对性价比高，工薪族摄友的镜头组合里多少会收藏一两支。初学摄影时曾用过半幅的SP17-50F2.8（A16），目前手上还有全幅的SP90Macro（Model 272E）和SP70-300VC（Model A005）在用，适用于特定场合，感觉都是很实惠的镜头。　　腾龙SP24-70F2.8VC（Model A007，以下简称A007）则是今年4月新出的镜头，不会是要去叫板人家的大三元的镜头吧。A007目前价格上不算贵但也不便宜，性能怎么样呢，正好赶上试用机会，接到笔者的老爷机器5D2上，就拍拍试试看吧。腾龙SP 24-70mm F/2.8 Di VC U (A007)镜头新品一、镜头外观评价从外观上看，A007有几个特点：　　1、全程最大F2.8恒定光圈，配合机身高感，暗光拍摄和虚化效果应该是能应付了；　　2、滤镜口径82mm，通光量大，外接其他镜片需要多破费一点了；　　3、USD超声波马达，对焦安静快速；　　4、VC光学防抖，开关键在镜头根部；　　5、Lock键锁定，可防止镜头下滑。　　需要特别说明的是，A007接，相机上可以做对焦微调（原来以为只有原厂的镜头才支持）。因此如果有跑焦的话，可以自己调一调。不过我这个镜头没有跑焦，不需要调。
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焦圈，为摄影而生Tamron AF 17-50mm f/2.8 SP XR Di II LD Aspherical [IF] VC (Canon) - Review / Test Report
Lens Reviews
Canon EOS (APS-C)
Special thanks to Marcel Sahlmen for providing this lens!
Introduction
Things have been busy in the standard zoom lens market lately - both Canon and Nikon have upgraded most of their lineup to image stabilized variants and the third-party gang follows albeit slowly. Sigma introduced their OS ("Optical Stabilizer") in a number of lenses and it seems as if Tamron is now next in line with their VC ("Vibration Compensation"). Tamron started the overhaul of their lineup with their extreme zoom lenses - the Tamron AF 18-270mm f/3.5-6.3 VC and AF 28-300mm f/3.5-6.3 VC. Regarding their sales volume these are their key lenses so they seem to be pretty much convinced that their VC system is ready for prime time. The Tamron AF 17-50mm f/2.8 SP XR Di II LD Aspherical [IF] VC reviewed here is even more ambitious because large aperture IS/VC lenses are even less forgiving with respect to quality control issues (VC/IS is technically nothing else but a controlled decentering). The pricing is very competitive at around 550EUR/650US$ which is about a third less than the Canon EF-S 17-55mm f/2.8 USM IS - the undisputed king in this lens class (at least in Canon EF mount).
The build quality is typical for a consumer grade zoom lens although Tamron SP ("Super Performance") lenses are actually intended to target the high end market. Most of the lens is made of good quality plastics based on a metal mount. The zoom ring operates quite smoothly. The focus ring has only a very short focus path so accurate manual focusing is a bit on the difficult side. It is somewhat anachronistic that the focus ring still rotates in AF mode - neither Canon USM nor Sigma HSM lenses show this effect anymore. The lens extends when zooming towards the long end of the zoom range and the supplied petal-shaped hood adds a little extra length. Thanks to internal focusing, the front element does not rotate so using a polarizer remains easily possible. The lens is quite a bit bigger compared to its non-VC sister lens although still smaller than the Canon EF-S 17-55mm f/2.8 USM IS.
The Tamron AF 17-50mm f/2.8 VC still relies on a conventional AF micro-motor. Speed-wise this is not a problem because of the already mentioned short focus path (turning the focus ring by a ~40 degrees traverses the whole focus range) but AF operations are noticeable (noise-wise). The AF accuracy was a bit soso on our test DSLR. The AF performance in Live-View mode (contrast AF) is rather mediocre.
Regarding the VC Tamron claims an efficiency of up to 4 f-stops. While we can confirm that the VC works very well we recommend to avoid exploiting this to the max due to the increasing number of outliers in field conditions.
& by photozone.de按：腾龙的A16&17-50&F2.8是被公认成像品质不错的好镜头，如今腾龙顺应潮流，加入了防抖技术，推出今天要介绍的VC新版本，让我们一起去看看。正文：&&&&&&数码进入APS-C时代后，由于市场需求，各厂商纷纷对APS-C型机身对应的专用投入开发，SP&AF17-50mm&F2.8&XR&Di-Ⅱ这支镜头就是在2006年发布的一支广受赞誉的APS-C画幅的标准变焦镜头。这支镜头在APS-C机身上有着等效于35mm规格的26mm-78mm焦距范围，正是在胶片时代倍受好评的腾龙28-75mm镜头的“小像场”版本。&&&&&&&&SP&AF17-50mm&F2.8&XR&Di-Ⅱ&这支镜头推出后，由于成像素质高，个头又十分轻巧，因此受到了用户的好评。不过几年后的今天，随着腾龙VC技术的开创，作为SP级别的镜头，为了提高拍摄成功率，让镜头更加实用，因此，升级到VC版本已变得十分必要。腾龙SP&AF17-50mm&F2.8&XR&Di-Ⅱ本次评测用镜头由腾龙（中国）有限公司提供，由独家提供&&&&&&于是近期，腾龙推出了SP&AF17-50mm&F2.8&XR&Di-Ⅱ&VC这支新版本镜头，在新镜头内部植入了VC防抖组件。今天就一起来看看这支时隔3年后再次推出的数码标变镜头表现如何吧。本次进行评测的镜头是卡口，我们使用尼康s与之搭配。&&&&新版SP&AF17-50mm&F2.8&XR&DiⅡVC在外观风格上依然继承了的一贯风格。不过如果和老版本的SP&AF17-50mm&F2.8&XR&DiⅡ镜头相比，新版VC镜头在外观细节上已经有了一些变化。新镜头的外观采用磨砂外观，和机身的外观工艺相近，手感虽然不高档，但是也还朴实。&左：SP&AF17-50mm&F2.8&XR&DiⅡ；右：腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC&&&&新老版本的镜头中部都有一条金色装饰环，换上标注着镜头的名称。其中“SP”代表着这支镜头有着极高的分辨率和素质，&而“DI&Ⅱ”则表明这是一款专为APS-C画幅打造的镜头。&&&&外观细节上，VC版的新17-50镜头的变焦环上的齿纹比原来细小并密集了一些，相反的是，新VC版本的腾龙17-50的对焦环齿纹变得宽大，没有原来那么密集。但是变焦环的直径和对焦环的直径相当，而不是像老版本的镜头那样在对焦环处变细了一些。腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC镜头的卡口和电子触点&&&&此外，我们从上面的两张图片上还很容易看到新老两支镜头卡口处电子触点的不同。老版本的电子触点只有5个，而增加了VC组件后，新版17-50的电子触点多达8个。&腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC镜头的功能键&&&&由于增加了防抖组件，我们看到新本版腾龙17-50VC镜头的镜身上多了一个防抖开关，AF/MF切换键和防抖开关并列，变焦锁定键也被保留下来。这几个键的操作手感并不如我们想象的那么好，在放置到机身上后，AF/MF切换键的位置略微偏偏高了一点。此外，新版本的VC防抖镜头采用了72mm的大口径，卡口依然是金属卡口。&腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC镜头前部和尾部设计&&&&从前组镜片和后组镜片上，我们很难看到如其他镜头一般反射出来的漂亮色彩。事实上，新版腾龙17-50镜头还是采用了先进的BBAR(Broad-Band&Anti-Reflection)宽频镀膜技术，能提高短波及长波光的通过性。而在两个镜片贴合的部位也用了内表面镀膜技术，以求提高色彩还原性能，获得最佳的色彩平衡。事实如何，我们后面将用样张说话。腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC镜头的遮光罩腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC镜头和s搭配&&&&此外，腾龙还为这支镜头配备了一枚花瓣型遮光罩。这支镜头和尼康00s搭配看上去也足够大，由于重心靠前，因此整体会往前倾。变焦设计&&&&SP&AF17-50mm&F2.8&XR&Di-Ⅱ的变焦环十分宽大，密集的齿纹能很好的防滑。该环的变焦行程接近90度。变焦环的阻尼均匀，正向和逆向的阻尼感一致，操作手感还不错。&腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC变焦前后对比腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC的变焦锁定键[/url]&&&&从广角端变焦到长焦端后，内镜筒会伸出大约相当于镜身1/2的长度。作为一款只有17-50变焦范围的变焦，腾龙这支镜头不至于出现内镜筒自由滑落的情况，但是为了保险起见，厂家还是在镜身上保留了变焦锁定键的设计，这让用户不管用多久都能放心携带。对焦设计&&&&新版腾龙17-50VC镜头的对焦环位于镜头前端，宽度只相当于变焦环的1/3，防滑齿纹较变焦环要宽而疏。由于不是全时手动对焦，这支镜头的对焦切换要通过镜身上的对焦切换键。但是作为腾龙SP级别的镜头，SP&AF17-50mm&F2.8&XR&Di-ⅡVC采用了内对焦设计，从最近端到最远端，内镜筒都不会转动，因此使用和遮光罩都更为方便。腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC的对焦切换键&&&&腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC的对焦环行程大约是45度，对焦阻尼比变焦阻尼轻，但是全程手感均匀。由于一直使用内置传统的对焦马达，并没有超声波马达，因此在对焦速度上算不上快，跟使用超声波马达的镜头相比有一定差距，尤其是在暗光环境下这种差距将更加明显一点。不过大多数情况下，这支腾龙镜头的对焦还算差强人意。&&&&至于对焦的准确性，我们在使用s时，使用中央对焦点对50mm端的最大光圈进行了测试，没有发现跑焦问题。但是在实际拍摄中焦点的精确度还会受到其他因素的影响。事实上，像D300s这类机型里都配备了对焦微调功能，因此，使用这类机身的用户也根本不用担心镜头是否跑焦。腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC+尼康00s以50mm最近对焦距离拍摄&&&&值得一提的是，腾龙17-50VC镜头的最近对焦距离较之老版本的17-50稍长了一些，从27cm延长到了29cm，放大倍率也从1：4.5缩小到1：4.8，因此，在近摄能力上，新版本的腾龙17-50VC有所减弱。镜组结构&&&&由于要加入防抖镜组，因此在结构设计上，新版本的17-50VC镜头也作了较大的调整。新版本的腾龙17-50VC镜头采用了19枚14组镜片结构设计，和老版本的相比，多了3片镜片（老版本的镜头为16枚13组），主要变化是中后部。新老版本的腾龙17-50镜头镜组结构对比&&&&在这19枚镜片中，有2片XR高折射率镜片，3片复合非球面镜片和2片LD低色散镜片。和老版本的镜头相比，少了一片XR镜片，多了1片LD镜片。由此可以想象，新镜头在色散控制上应该会有更好的表现。参数对比&&&&从参数表上可以看到，在增加了一个防抖组件后，新版本的腾龙17-50重量增加了130g，因此整只镜头拿在手里还是相当有分量的。不过，尽管如此，新增的防抖组件却并没有带来镜身体积的太大增加。新镜头的长度只增加了1cm多，直径更是只增加了大约6mm。名称SP&17-50mm&F/2.8&Di&II&VC（Model&B005）SP&AF17-50mm&f/2.8&XR&Di-II&LD&Aspherical&[IF]&（Model&A16）镜组结构19枚14组16枚13组特殊镜片2枚XR高折射率镜片、2枚复合非球面镜片、2&枚LD低色散镜片3枚XR高折射率镜片、2枚复合非球面镜片、1&枚LD低色散镜片光圈叶片7片7片最小光圈F32F32视角78°45-31°11′　78°45-31°11′最近对焦距离29cm27cm放大倍率1：4.81：4.5口径72mm67mm直径×长度94.5×79.6mm83.2×73.8mm重量570g440g&&&&事实上，为了既增加防抖组件，又继续保持大光圈和小体积镜身，腾龙的设计师下了很大的功夫。因此，最终我们很高兴看到这支新镜头还能像以前那么小巧便携。锐度测试&&&&我们用这支SP&AF17-50mm&F2.8&XR&Di-Ⅱ&VC在和s搭配下，拍摄了ISO&12233分辨率标版。拍摄使用相机的默认设置，自动对焦，自动白平衡、关闭所有降噪、D-lighting和防抖。图片经过软件处理，得到了这支在MTF50下各个焦段的锐度值。17mm端MTF50锐度值50mm端MTF50锐度值&&&&测试结果表明，这支镜头的锐度非常高，而且各级光圈下的表现非常稳定，其中，F5.6为最高值。此外，值得注意的是镜头的边缘锐度和中心十分接近，并没有大的起伏。由此看来，这支镜头的成像非常值得期待。下转二楼
续前：VC防抖能力测试&&&&VC防抖功能是独创的防抖技术，它采用3组驱动线圈，通过3个钢珠以电磁驱动方式控制补偿镜片（VC镜片），实现了极小摩擦的平滑运动。这种设计机械构造简洁，大大减小了体积。不仅如此，腾龙号称该VC防抖技术是三维的，不仅可以补偿横向抖动，镜头纵向的倾斜抖动也能补偿。&&&&那么这支镜头的防抖能力到底如何呢？尤其是搭载在这个焦距不算长的镜头上，防抖效力有多大？我们将这支镜头与s搭配，使用50mm焦距，等效焦距为75mm。根据安全快门为等效35mm规格焦距的倒数来看，此时的安全快门应该为1/80s左右。&&&&我们分别使用低于安全快门4挡的1/5s、低3挡的1/10s和低2挡的1/20s来拍摄同一目标，每组各拍10张，站立手持拍摄，屏住呼吸，尽最大可能稳定相机。最后，我们进行了100%截图。&&&&我们在算清晰的张数的时候，将没有明显重影的都算为清晰。低于安全快门2挡时：1/20s1/20s&&&&清晰的张数大约为7张左右，因此，可以说拍摄成功率大约为70%。低于安全快门3挡时：1/10s1/10s&&&&清晰的张数大约为5张，拍摄成功率大约为50%。低于安全快门4挡时：1/5s1/5s&&&&清晰的张数只有2张，拍摄成功率仅为20%左右。&&&&当然，防抖效果因人而异，防抖级数也会因为镜头不同而不同，这支腾龙17-50VC镜头在开启防抖功能后，在低于安全快门3挡时，还能提供50%左右的拍摄成功率。我们使用s与SP&AF17-50mm&F2.8&XR&Di-ⅡVC搭配，拍摄了17mm和50mm端各级光圈的样张，并对中心和边缘部分进行100%截图。拍摄时使用默认的ISO&200,自动白平衡、最大JPEG、标准色彩风格。截图示意17mm端各级光圈中心和边缘截图&&&&17mm端的各级光圈截图中可以看出，在最大光圈下，这支镜头也有着非常不错的分辨率。值得称赞的是边缘成像和中心部分的差距竟然如此之小。各级光圈成像中，F4和F5.6的锐度最高，F8以后则逐级下降。&&以下50mm端的样张截图，设置和前面一样。截图示意50mm端各级光圈中心和边缘截图&&&&50mm端的锐度变化依然表明，F4、F5.6是这支的最佳光圈，而此时，F2.8时的锐度和收小一档后的F4有明显区别，边缘和中心部分的锐度差距较大。但是收小光圈后，中心和边缘的差距又变小。F22之后的边缘成像开始急剧下降。&&&&因此，建议用户们在使用这支镜头时，如果要想获得最好的画质，尽量使用F4和F5.6的光圈。当然F2.8的成像也不赖，F8-F16的画质也可圈可点。中心和边缘画质的微小差别非常可喜，头的锐利得到了彻底表现。暗角&&&&四角失光几乎是所有带广角的都有的现象，而为了控制这种四角失光现象，这支镜头也采用了3片复合非球面镜也使得周边的入射光能获得和重心部分相近的角度，从而减弱四角失光现象。17mm端暗角：&左：F2.8；右：F4&左：F5.6；右：F850mm端暗角：&左：F2.8；右：F4&左：F5.6；右：F8&&&&通过测试我们发现，新版腾龙17-50VC镜头的暗角控制得非常好，就算是在17mm端的最大光圈下，也只有十分轻微的暗角。当收小一挡光圈后暗角已经很难察觉。反而是在50mm端，F2.8时的暗角稍微明显一些，但是收小一挡光圈后，暗角也基本消失，到F5.6时基本没有暗角。看了，3片非球面镜的使用确实非常有效。畸变&&&&我们在距离一面砖墙1米左右的距离上分别拍摄了这支腾龙17-50VC镜头在17mm端和50mm端的测试图，由此我们可以看到这支镜头对畸变的控制情况。腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC在17mm端的畸变腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC在50mm端的畸变&&&&从样张可以看到，在17mm端确实能看到桶形畸变，但是畸变程度并不严重。而在50mm端的枕形畸变则十分轻微，几乎无法察觉。畸变的良好控制事实上得益于XR高折射率镜片的运用，这种镜片能够矫正像差。逆光测试&&&&虽然采用了先进的BBAR(Broad-Band&Anti-Reflection)宽频镀膜技术，能提高短波及长波光的通过性，有效降低反射带来的危害。但是在面对严酷的逆光环境时，这支镜头还能否如厂家所说般优秀？&&&&我们在各种逆光环境下拍摄了17mm和50mm各级光圈的样张。17mm端左：F2.8；右：F4左：F5.6；右：F8左：F11；右：F16F22&&&&这是一个侧逆光的环境，太阳正好处于画面右上角，光线斜射入镜头，这种情况最容易产生眩光和鬼影。事实也说明了这一点，这支镜头还是出现了明显的鬼影和眩光。尤其是收小光圈后，鬼影更加严重但是，除了鬼影，我们看到，逆光画面的主体对比度和色彩还原还是很不错。50mm端左：F2.8；右：F4左：F5.6；右：F8左：F11；右：F16F22&&&&在这个几乎是正逆光的场景里，这一焦距下的逆光表现和广角端非常相似。不过在F2.8和F4时，鬼影还不是很明显，从F5.6开始才看到明显的鬼影。随着光圈的收小，鬼影愈加明显。&&&&不过需要说明的是这一测试是在不使用遮光罩的情况下测试的。如果使用遮光罩，这种现象应该会有所减少。下转三楼
11:07:48 修改
续前：样张&&&&样张使用s拍摄，最大JPEG、自动白平衡。其余设置在图片下方标注，点击可查看原图。F3.2，1/1250s，ISO&100&左：F2.8，1/2000s，ISO&100；右：F4，1/320s，ISO&100F7.1，1/200s，ISO&100&左：F2.8，1/500s，ISO&100；右：F5，1/100s，ISO&100F3.5，1/13s，ISO&100；手持拍摄&左：F7.1，1/320s，ISO&100；右：F4，1/1000s，ISO&100F3.5，1/320s，ISO&100F5，1/200s，ISO&100F4，1/640s，ISO&200&&&&我们对SP&AF17-50mm&F2.8&XR&DiⅡ&VC的成像感到非常满意，只要是在F4-F8的各级光圈下都有着非常高的锐度和解像力。这支头的色彩饱和浓郁，看上去非常养眼。不仅如此，大光圈下对背景的虚化能力也非常强，圆形光圈所带来的圆形光斑让焦外非常漂亮。由于最近对焦距离还算近，因此拍摄一些特写镜头也不觉得吃力。总之，这支镜头从、人文到风景都能应付自如，且成像非常优秀，不愧是腾龙SP镜头。总结&&&&看到这支的成像时，我们感到很欣慰，这又是一支高素质成像的镜头。从样张中，我们可以充分体验到这支镜头在色彩、焦外虚化、重点锐度和解像力上的实力，那种锐利是一贯的特点。尤其值得高兴的是F2.8的大光圈也非常锐利，而且中心和边缘成像十分接近，这对于风景爱好者来说是个好消息。SP&AF17-50mm&F2.8&XR&Di-ⅡVC&&&&如果要说不足，就是这支镜头在逆光时候容易出现鬼影，但是这个问题其实也是仁者见仁，智者见智的问题。除此外，这支镜头在暗角、畸变上都控制得很好。如果注意观察一些高光部位，这支镜头对边缘色散也控制得相当好，我们很少在画面的高光部位看到扎眼的紫边。可以这么说，这支腾龙镜头的成像并不逊色于原厂的同类型镜头。&&&&而在成像之外，这支腾龙镜头的做工虽然没有太多值得称道的地方，但是这也是腾龙头之所以便宜的原因，但是朴实的形象给人感觉还是比较耐用。对焦马达算不上快，但是也不会给拍摄造成太大障碍。腾龙SP&AF17-50mm&F2.8&XR&Di-ⅡVC&&&&当然，这支镜头最值得说的就是它的VC防抖功能。这一防抖功能的有效性，再配合这支镜头的F2.8恒定大光圈，让它在夜晚和室内一些暗光环境下也能够让用户有更大的拍摄自由度。腾龙SP&AF17-50mm&F2.8&XR&Di-Ⅱ+尼康s&&&&其实，腾龙镜头一直都是以这种形象示人，做工和对焦平平，但是也不会太糙，但是在成像上绝不打折扣。再加上合理的价格，让腾龙镜头成为非常具有性价比、勤勤恳恳踏实务实的镜头品牌。目前，这支镜头的媒体报价为3600元左右，只比老版本的腾龙17-50上市的价格贵了一点，相信真正上市的价格会更便宜，如果这支防抖头的价格能和老版本上市时的价格持平，它的性价比还是相当高的。
11:08:31 修改
Re:[luor312,3楼]&以下是引用&luor312&于&11:06:03&在3楼的发言：&Re:[luor312,2楼]&以下是引用&luor312&于&11:05:46&在2楼的发言：&Re:[luor312,1楼]&占楼备用
再占一楼似乎足够了新版对字数的限制比较可恶……
11:09:36 修改
不错的镜头~~
Re:[luor312,4楼]&视乎是很不错的镜头。尤其是vc&！但畸变的程度，还是比较。。。。。对的起这个价格吧！我用的是s家的机器，以前的胶卷相机你有研究吗？哈哈&突然把压在箱底的&相机拿出来想出卷胶片！哎！！！！就是个怪圈，自得其乐！新年愉快！
Re:[yungsun888,6楼]&以下是引用&yungsun888&于&12:18:38&在6楼的发言：&Re:[luor312,4楼]&视乎是很不错的镜头。尤其是vc&！但畸变的程度，还是比较。。。。。对的起这个价格吧！我用的是s家的机器，以前的胶卷相机你有研究吗？哈哈&突然把压在箱底的&相机拿出来想出卷胶片！哎！！！！就是个怪圈，自得其乐！新年愉快！
膠卷相機？有甚麼問題？
这支镜头在《咔啪》上被西平一生大赞过一番，在这个价位上，对无米之人也算是物有所值了。
眼 到 之 处 皆 美 景
For today`s photographer
Re:[游色戏光,8楼]&以下是引用&游色戏光&于&13:15:45&在8楼的发言：&这支镜头在《咔啪》上被西平一生大赞过一番，在这个价位上，对无米之人也算是物有所值了。
&呵呵，確實是物有所值。感謝支持！
三四千大圆啊～！
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