The Tamron 17-50mm f/2.8 XR Di II Lens delivers very good image quality in a small, light, fast & affordable package.Add in the very popular focal length range và you have a lens that is just right for many digital SLR camera owners.The early-in-its-lifecycle popularity this lens is enjoying substantiates this claim.
Bạn đang xem: Tamron 17
Like Canon"s EF-S Lenses, 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 lớn be used.Measuring 2.9 x 3.2" (74 x 82mm)(d x l) và weighing 15.2 oz (430g), the Tamron 17-50 is an ideal kích cỡ for these smaller digital SLR bodies.It balances và handles very nicely.
Build unique 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 & deeply ribbed.The zoom & focus rings turn smoothly.Tamron"s rear lens cap only attaches at one position - a bit of a pain since I"m used khổng lồ 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 và the front element does not rotate.FTM (Full Time Manual) focusing is not supported.Since the manual focus ring is rather small và in front of the larger focus ring, I did not find the focus ring turning during autofocusing khổng lồ 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 và focus rings rotate the opposite direction of Canon"s lens rings.A zoom lock switch is provided.
Positioned above from left khổng lồ right in their fully retracted positions are the following lenses:Canon EF-S 18-55mm f/3.5-5.6 IS II Lens
Tamron 17-50mm f/2.8 XR Di II Lens
Sigma 17-50mm f/2.8 EX DC OS HSM Lens
Tamron 17-50mm f/2.8 XR Di II VC Lens
Canon EF-S 17-55mm f/2.8 IS USM Lens
The same lenses are shown below in their fully extended states with their lens hoods in place.
The optical chất lượng 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 xuất hiện at f/2.8 at all focal lengths - I do not hesitate lớn use this lens at f/2.8.Narrowing the aperture 1 stop or so yields slightly sharper image centers và 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 và more noticeable at 35mm before lessening khổng lồ 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 bởi vì with this lens is to compare it with the
Canon EF-S 17-55mm f/2.8 IS USM Lens and
Sigma 18-50mm f/2.8 EX DC Lens -Both shown along with the Tamron in the above & below pictures.
First, the Canon 17-55 IS.This is my at-the-time-of-this-writing always-mounted lens for my
Canon 30D.The obvious difference between these lenses is kích cỡ - as shown in the picture.The Canon is .4" (9.5mm) wider & 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 kiểm tra -It doesn"t seem to lượt thích 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 lớn justify the very large price differential.
Xem thêm: # 30+ Mẫu Giấy Dán Tường Phòng Ngủ Vợ Chồng Loại Nào Đẹp? Mua Ở Đâu Giá Rẻ?
The Sigma 18-50mm f/2.8 EX DC Lens is very, very similar to lớn the Tamron 17-50mm f/2.8 XR Di II Lens.These lenses are more similar than different.They are very similarly sized & shaped.They function very similarly.
The differences?
The Sigma is less resistant lớn flare.The Sigma shows more CA.The Tamron is noticeably wider (17mm vs. 18mm - và 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 lớn install/remove the lens cap - this is a pain -Plan lớn buy the Tamron cap if you purchase the Sigma lens.
My pick?
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 Lowepro Lens Case 1W as a nice solution to lớn this omission.
Click on the image below khổng lồ compare the Tamron 17-50mm f/2.8 XR Di II Lens lớn other lens models with and without hoods (opens in new window lớn 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 các buổi tiệc nhỏ lenses.Since Tamron reverse engineers (vs. Licenses) manufacturer AF routines,there is always the possibility that a new toàn thân might not tư vấn an older third các buổi tiệc nhỏ lens.There are examples of this happening in the past.Sometimes a lens can be rechipped to lớn be made compatible, sometimes not.Second, there is the risk of a problem that results in the lens and body toàn thân manufacturers pointing blame at each other.However, Tamron"s 6-year warranty is far superior khổng lồ Canon"s standard 1 year warranty.
I have seen these 2 lenses being suggested by many people across the site as general purpose zooms & an upgrade to lớn the typical 18-55mm kit lenses. The price difference seems khổng lồ be around $200 (~INR 10,000) between the two. The lenses are also considerably cheaper than their CanonNikon counterparts.Having using the stabilized kit lens on Canon, I appreciate the importance of ISVC for slow shutter speeds (not just low light, but also for effects). However, quite a few nhận xét seem khổng lồ suggest that the non-VC version seems lớn be better optically overall. There seem khổng lồ be more quality control issues with the VC version as well.
My question is two fold:
How vày the 2 lenses compare against each other - is the premium for the VC version worthwhile for the chất lượng trade-off?nội dung
Improve this question
Follow
edited Apr 13, 2017 at 12:44
Community
Bot
1
asked Dec 4, 2011 at 5:32
ab.adityaab.aditya
4,64544 gold badges3737 silver badges6464 bronze badges
$endgroup$
địa chỉ cửa hàng a bình luận |
5 Answers 5
Sorted by: Reset to default
Highest score (default) Date modified (newest first) Date created (oldest first)
4
+50
$egingroup$
I have the VC version (Nikon mount). I have tested it alongside my 50mm prime và found it khổng lồ be just as sharp at f/3.2. It is very slightly softer at f/2.8, but only when looking at an artificial demo pattern. That"s one person"s opinion based on a sample of one.
I have tested other non-professional zoom lenses (Nikon & Sigma) & the Tamron is far, far sharper than any of them. Unbelievably so.
A camera shop owner I know recommended the non-VC version as being very sharp và reliable (and inexpensive). He didn"t say it was worth buying the non-VC version over the VC version. He just recommended it highly as a fantastic value. He did say he"d also sold a lot of the VC version & hadn"t noticed any quality control issues.
Because the lens is sharp wide open, VC isn"t really vital except in low light. I would say the VC is probably not worth the premium unless you intend to shoot a lot of low-light or indoors work without flash.
Can"t help with the comparison to lớn the Canon 18-55mm. I would imagine from what I"ve found compared to other Nikon equivalents that the Tamron will be noticeably sharper, especially wide open. You can use it at 2.8 or 3.2, whereas the Canon probably needs khổng lồ be stopped down lớn f/5.6 or f/8 to be at its sharpest.
