compact piñata and successful compromise

It may be a paradox, but there are situations where you would have with small image sensors such as the 5D MkIII just like a lot more flexibility. The sacrifice of light intensity and quality here, unfortunately, can hardly be avoided and is particularly used to, if you otherwise zoom with continuous 1: 2.8 maximum aperture used, or more intense fixed focal lengths. The more specialized optics, the unfair comparison. Nevertheless, the new Tamron pleasantly surprised:

Positives:
+ Image stabilizer that will nail the image still safe even at 300mm
+ Surprisingly sharp images
+ More accurate, faster and quieter autofocus
Surprisingly high quality + in feel and appearance
+ Minimum focusing distance decreases with increasing focal length

Neutral:
* Usable rotary zoom that does not fall down without being asked at least when new easy

What is striking when compared to SP, or L-zoom, is mainly the compromise on the set zoom. Which is useful, but not exactly spoiled. But otherwise it has everything what one has just used, including the slider for the zoom lock at 28mm and a lens hood.

In practice, especially the relative faintness of such travel zoom is the biggest hurdle. Without light thus comes only limited to joy. Those who like to use open aperture that can thanks to good imaging performance also do, but have to get used the aperture value, or constant at 1 on the additional construction-related variables: 6.3 content, but then what would be something little.

The gradation is approximately as follows: 28mm f / 3.5 - 35mm f / 4 - 50mm f / 4.5 - 70mm f / 5 - 100mm f / 5.6 - 200mm f / 6.3

Tend to take the bezel always a little earlier. The scale here is rather a rough guide, but helpful and with the rounded values ​​it can better remember simple.

Conclusion:
Those who expect a panacea, is due to design safe disappointed. The physics does not levers also from Tamron. If you want to have the flexibility as an additional option in the arsenal, but receives here on top a surprisingly good approximation to significantly more specialized lenses and a surprisingly useful image stabilizer. Who wants to just get on with it, should consider whether a significantly cheaper complete system with a smaller sensor would not be a better alternative to the other. The possibilities of a 5D Mark III is irritating you so sure not, but there are occasions when a this compact surprise package saves the day - at least within the known limits of such travel zoom.