cornborer
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Antolflash
Цитата:| Можно сказать, что на сверхширокоугольниках для каноновского кропа я собаку съел. |
сказать можно все.  а вы проверяли в контровом свете, в диапазоне относительных отверстий и фокусных расстояний? но даже не это главное. нельзя основывать свой вывод на тестировании лишь единичных экземпляров. иначе легко впасть в ересь.
Вот что пишет знаменитый Боб Аткинс:
These comments are made on the basis of looking at dozens of images, shot over several days, not just the few examples on the previous page
The Tokina 12-24mm f4.0 is a good lens. It's sharp in the center and pretty good at the edges when stopped down a little. Corners are a somewhat soft wide open at 12mm, but sharpen up nicely by f5.6. Similarly corners at 24mm wide open are a little soft, but stopping down to f5.6 sharpens them a little and stopping down to f8 sharpens them a little more. Center sharpness is good at all apertures and focal lengths. Chromatic aberration is well controlled, flare resistance is good and distortion, though noticeable at 12mm, is low. Vignetting is slight and not likely to cause problems and is essentially eliminated by stopping down a stop.
Probably the biggest factor in deciding between this lens and one of the other options (Canon 10-22, Sigma 10-20, Tamron 11-18) is whether you want the extra coverage that 10mm can give you over 12mm. If you are happy with 12mm, then the Tokina lens at an average price of around $500 may well be a better buy than the Canon EF-S 10-22 at around $690. The Canon lens has a silent USM motor and full time manual focus, as well as a wider angle of coverage, but it's almost $200 more (plus you have to buy the lens hood separately!).
In terms of optical quality the Canon may be a little sharper in the corners wide open at the wide end and the Tokina may be a little sharper in the corners wide open at the long end, but overall the optical quality of the two lenses is pretty similar. If forced to say which is the overall sharper lens, on the basis of pixel peeping at resolution test chart images I'd have to give the edge to the Canon 10-22 - but based on real world shots it would be pretty hard to tell. The Canon does show a little less distortion at the wide end of the range, though distortion in the Tokina is also pretty well controlled. The Canon 10-22 is also about 6.5 oz lighter so if weight is critical, that could be a factor worth consideration.
Overall I can say that I liked the Tokina 12-24mm f4 and I'd have no hesitation in recommending it if the focal length range meets your needs.
Мнения Cover2sucks и Kassian - это не есть исключительно их собюственные, личные мнения, а итог довольно обчстоятельных обсуждения вопроса на форуме. и не только на нем.
И наконец, мелочь: писать название объектива в шапке стоит полностью - так: Tokina 12-24mm f4 DX - обратите внимание как пишут Cover2sucks и Kassian.
удачи
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