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Michele Marano www.juzaphoto.com/p/MicheleMarano  |
The following opinions have been automatically translated with Microsoft Translator. | Tamron 200-400mm f/5.6 AF LD IF Pros: Build quality, great price, sturdy tripod ring Cons: Sharpness at room temperature to the maximum extent, slow AF, Purple fringing Opinion: It 'was my first telephoto lens, excellent value for money, and interesting excursion. The focus is not very fast, especially with machines of a few generations ago (D90), the optical quality is not the greatest, 200 mm is good, but going forward it is obvious purple fringing and softness wide open. Closing improves, achieving modest results. The build quality is great, it is made of pure metal, it is quite heavy, but light compared to the same goals in its class. The collar on the tripod is sturdy and durable. sent on November 10, 2014 |
 | Sigma 28-70mm f/2.8 EX DG Pros: Relatively low cost in comparison to the equivalent Nikkor, weight, 77mm filters, brightness, rings comfortable, build quality, focus ring one touch Cons: Sharpness wide open, fast autofocus, zoom, front end too Opinion: The build quality of my copy is great, I talk about the EX version with the slide on the scale of meter / foot. The ring focus can be moved axially by selecting the AF mode or M, which is convenient to not have to waste time moving the switch on the equipment and start right from the beginning to focuse on hand (or vice versa). The focus (on the D90) is quite slow, at least noisy, but accurate. The optical quality does not come close to that of the unmatched Nikkor AF-S 28-70 2.8, and is soft wide open most of the frame. Already a closing stop the situation improves noticeably to reach a high quality 5.6 aperture. The filters 77 are among the pros because the majority of the optical high-end 77 has a diameter, so it's pretty standard. The weight is enough to content. The finish of the Sigma EX series is gradually discard, but I personally do not happen, I think it depends on the conditions in cui works the camera, and having never stressed, never had a problem with the posting of the exterior trim. The petal-type hood is comfortable and functional. The built-in flash can not be used to below 50 mm because otherwise comes to create a shadow due to the elongation of the front group, which has an excessive stroke. I used this lens for three years, and I replaced it recently with the 24 2.8 AF-D, simply because I realized that I used almost exclusively to 28 mm. I recommend it to those who can not afford more expensive solutions but do not want to give up a lens to medium-high 2.8 diaphragm. sent on November 02, 2014 |
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