“ yourself a bellyful of sparrows „

“ I own the Tamron 150,600 by the end of 2014.
I used it in different situations so far on D300s for the genre that I prefer is the birdlife.
I am satisfied with the versatility, which is why I bought it; for the optical performance which in practice does not make me regret the 300x1,7 Nikkor that I used before.
Sull'AF projection (for use of several thousand shots until now) a few episodes of arrival as it will go without restart in the opposite direction that I did not get to "play" on a voluntary basis. Some incomplete closure inexplicable.

Sull'AF still find it a "landmark" project significant TAMRON the chareristica limiter AF that can be set to full (from minimum to infinity) or from 15 m to infinity; in this condition the speed of engagement is very good but the episodes of "loss of capture" subject to passing "too close" unfortunately increase.

When compared with the SIGMA C, the characteristic of the limiter AF is the first that would look as it is "the fault" more that I noted for the use that I do on TAMRON (obviously would look at the rest ... optical performance , construction, cost, etc.)

I only saw the SIGMA S and, despite the constructive aspect of TAMRON is good, it seemed clearly on a better level. The limiter SIGMA S has 3 positions from minimum to infinity, from minibut at 10, from 10 to infinity (weight and cost know all that are greater).
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