This is not a Photoshop article but I think that it’s still good to share some photographic equipment with you that I have experience with. Lens is one of the most important parts of photographic gear so I wish this article with help you would help you find a good lens.
When I heard about new lens from Tamron, Tamron 17-50 F2.8 VC, I thought that this version must have some improvement over the current version, Tamron 17-50 F2.8 which I often use for most of my shots. My friend, Kun, and I went to camera shop in Bangkok, named AV camera, had chance to test new lens from Tamron, Tamron 17-50 F2.8 VC. Initially, I would like to test this lens with Canon EOS 400D for Canon mount but the Canon version is not available yet so I use my friend camera, Nikon D300, instead.
My reviewed points are listed below;
Body: Its body is bigger and better lens body than old version, Tamron 17-50 F2.8 . When I use it, I feel that it is more robust and fit a little bit better with my hands.
Focus Speed: The focus speed of Tamron 17-50 F2.8 VC is faster thanTamron 17-50 F2.8 but it’s still slower than Ultra Sonic Motor (USM for Canon) or Silent Wave Motor (SWM for Nikon). Anyway, I am impressed with this improvement.
Focus Sound: The non VC version, Tamron 17-50 F2.8, is so noisy; however, this version produces less noisy which is acceptable. If you compare its focus sound to Ultra Sonic Motor (USM for Canon) or Silent Wave Motor (SWM for Nikon) , it is still far away from the big names.
Vibration Compensation (VC): The Vibration Compensation (VC) is the most interesting point that I would like to see how excellent it is. I tried several slow speed shots and I still got good images. You can see from the sample shot below that I am able to hand held and a take photo at 50 mm with shutter speed of ¼ sec and I still got a nice photo. It is almost impossible for me to hand held and take good quality photos with ¼ sec shutter speed. When VC is on, you will see a little bit shaking, similar to Image Stabilizer (IS) of Canon, in your view finder while focusing and taking photos so please do not panic because VC is working.
Sharpness: At F2.8, this lens produces nice and acceptable sharp images. When you stopped down, this lens can create excellent image quality as you can see from the sample below. I capture detail at the middle of this photo.
Referring to a sample photo below with 100% zoom, at f 2.8 a photo is a little blur but over all image quality is good. When aperture is stopped down to F 4 onwards, the image quality is excellent. The image quality will decrease when aperture is very small (F22) but the overall is still very good.
Note: All shots are hand held shooting.
Looking at the border of photo, the lens makes nice and sharp photo starting at f 2.8. Normally, when stopping down aperture (f 4 onwards), the lens create excellent sharpness at border.
Let’s see the sample for image sharpness at different aperture values.
1st point in the middle at17 mm
2 nd point
I took many shots from 17 mm to 50 mm with various f-number you can down load full images as per links below. Note: All shots are hand held shooting.
Photos at 17 mm ** Please remember that all shots are hand held shooting therefore they are not 100% match of each photo. All photos are 12 MP JPG images so each photo is big size.
Photos at 34 mm
Photos at 50 mm
Motorcycle shot at 36 mm
Distortion: At 17 mm, barrel distortion is noticeable as you can see from sample shots. The barrel distortion reduces when long focal length is applied. There is slightly noticeable barrel at 24 mm. After a focal length of 24 mm, the barrel distortion is almost none.
In comparison to Nikor 17-55 F 2.8 (1330 $) in case of Nikon mount, it’s almost half price of Nikor lens. What’s more, looking at Canon Lens for the same focal range , Canon EF-S 17-55mm f/2.8 IS USM Lens (1040 $), the Tamron is still 400 approximately cheaper.
Conclusion: Although I did not much time for testing this lens, I think this lens is one of the good normal zoom lens for APS-C sensor camera. Therefore, before buying new normal lens or upgrading new lens for your digital camera, please consider this lens.
Where can you buy it at very cheap price?
I recommend Amazon.com because you will be the best price on the internet and Amazon has good reputation of good delivery.
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