Bác chạy thử ra cái gian Sony ở Tổng hợp cũ ngó qua cái ống Carl Zeiss Vario-Sonnar T* DT 16-80 F3.5-4.5 SAL-1680CZ xem nó là cái gì và nó có AF không nha.
Mấy ống T* được anh em xoay xoay vặn vặn chuộng vì chất lượng quang học tốt mà giá lại khá ổn, không quá đắt, lắp trên Canon chụp bét nhè. Nhưng còn mấy ống AF thì cũng chưa chắc, vì giá cũng đắt vật vã mà chất lượng cũng không phải quá xuất sắc.
Ví dụ, lấy ống
Zeiss ZA 16-80mm f/3.5-4.5 DT so với ống
Nikkor AF-S 16-85mm f/3.5-5.6G ED VR DX thì Nikon 16-85 được đánh giá cao hơn về chất lượng quang học và giá rẻ hơn.
Còn ống
Zeiss ZA Vario-Sonnar T* 24-70mm f/2.8 SSM vẫn chưa lại được ống
Nikon AF-S 24-70 f/2.8 Nano mặc dù giá tương đương nhau :21:
Assuming a good sample the Zeiss ZA 16-80mm f/3.5-4.5 DT is surely a desirable lens. The primary design objective was obviously to maximize resolution because this is where the lens shines with generally stunning MTF figures matching or beating many standard zooms out there. However, there're also downsides. At 16mm vignetting is a problem at f/3.5 and the level of CAs and barrel distortions is very high. At around 700€/US$ the lens resides somewhere between the typical consumer and pro grade zooms. Some may have hoped for a metal construction but truth is that most other standard zooms in this price league have also plastic bodies. The mechanical quality is decent with tight tolerances but nothing to rave about. In Sony Alpha mount the lens remains an obvious choice for enthusiasts and beyond.
Optical Quality: 3 1/2 *
Mechanical Quality: 3 1/2 *
Price/Performance: 4 *
Despite some shortcomings the Nikkor AF-S 16-85mm f/3.5-5.6G ED VR DX is probably still the best DX standard zoom lens in Nikon mount to date. It is very sharp throughout the range although there could be a little less field curvature (curved focus field) at 16mm. The level of distortions and lateral CAs is comparatively moderate for such a lens (still a bit high in absolute terms). Vignetting is generally well controlled except at 16mm @ f/3.5. The rather slow max. aperture may be a bit unfortunate because the achievable bokeh is rather underdeveloped in conventional scenes. If you're after a (relatively) shallow depth-of-field you should also stick to the 85mm setting - the bokeh is rather harsh at 50mm f/5. The VR II (Vibration Reduction) can help to safe the day in low light situations (at cost of shutter speed) with a "gain" of ~3 f-stops in field conditions. The build quality is on a good level but don't expect professional grade quality here. All-in-all an obvious choice but not flawless ... which is why I had to agonize a while about the optical rating but I believe that the lens is somewhat more desirable than the AF-S 17-55mm f/2.8G ED although it's a bit like comparing apples and oranges here.
Optical Quality: 4 *
Mechanical Quality: 3 *
Price/Performance: 4 *
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