tamron 24-70mm

What is the difference in these lenses?

http://www.amazon.com/Sigma-24-70mm-2-8- … This is $ 899 http://www.amazon.com/Sigma-24-70mm-Asph … This one is $ 417 I realize that the cheapest is a "Aspheric lens. I looked up and found that it is only a description of the lens itself, and indeed, may be better than the standard zoom lens. Why, then, is half the price? Does the image quality? I a Nikon D80, and am looking for a great goal more versatile (with an f-stop 2.8)-any suggestions? Sigma, Tamron, Nikkor, etc. .. I'd love to know! Moreover, I know they are very expensive, so do not let that stop you from suggesting to the good! Thanks in advance! 1 seconds ago – 4

Two big differences. The most expensive is internal focus and has also built an engine of the lens. The more expensive one is a new internal lens design, and requires no aspherical elements. The best lens, regardless of price, is the Nikon 24-70mm f/2.8. It is much better than any of these spectacles, and well worth the extra money. If you can not pay much, take a look the Tamron 28-75mm f/2.8 and Sigma lenses. Note also that even the older Nikon 28-70mm f/2.8 is still quite expensive, even used. It happens that also have a Tokina 24-70mm f/2.8, but is soft when shot at 2.8 and do not sharpen up f / 4. Oh, and your links do not work. Try to improve http://www.sigmaphoto.com descriptions of the lenses. Edit: more controls. New objective may have aspheric elements, but just not advertising them. Empenage is wrong again. Tokina was founded by former Nikon engineers and has a good reputation for quality construction. And since usin IB Nikon, Tokina, Sigma and Tamron lenses, I can say that Sigma lenses, and well, have a slight color cast to them compared to Nikon, which are more neutral. His experience means that fans do not know what you're talking. And always thumbs down everyone elses response. Again, the least expensive lens is half the price because the high price has incorporated an internal focusing motor, a new design internal lens … and new lens elements.

Overcoming Tough Times

New Tamron AF 24-70mm F3.3-5.6 Zoom Lens For Sony DSLR $59.95

Canon EF Mount 24-70mm Asphericl Zoom Lens by TAMRON $31.98

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NIKON AF MOUNT 24-70MM f/3.3-5.6 ASPH BY TAMRON- USED $99.00

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