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GOOD RUNAROUND LENS 18/01/2010 The Tamron is a good lens and pretty versatile, I found no real problems with focus though it does get a little `soft' over 150. It's fairly quite in operation and reasonably fast to lock on. However, if you are into astronomy and want to take pics with your DSLR then I would suggest that this isn't the lens for you. The barrel lock only works (it's designed that way) at 18mm which means that the thing creeps back on itself if you need more than 18mm (which you will!) after mounting on a tripod for timed exposures and in the dark you may not always notice, I didn't. Apart from that for the price I think it's an excellent buy. By A. Taylor Ash, England				8/10
Blurred Images 12/01/2010 This is the worst lens I have ever owned. I used have used it with my 400D. I used it when I first bought it, then soon put it away because it was bad. Then one day I had a wedding to take pictures at, I completely forgot why I never used this lens, and I wish I had just binned it straight away, it ruined my pictures... I couldn't find any sharp pictures. The worst thing was when I zoomed it and the people on the outside of the frame, well even 1/4 of the way in were so blurred in relation to the center it is amazing, I will add some pictures to this lens to illustrate this later. I was so upset when I got the pictures back I can't tell you! By Tristan London UK				2/10
A Reasonably good budget lens at a truly fantastic price! 17/10/2009 I happen to have this as well as its rival, the Canon 18-200. So please bear that in mind when assessing my review. Secondly, please ignore the (inevitable) forthcoming two thumbs down as I happen to have a complete i--ot, who trolls all of my reviews. In fact, he who always thumbs my reviews down has written more in the comments section of my reviews than anything else on the whole of Amazon, which should say something to you about how much worth you should give to his thumbs down to my review. And now, my review which I hope most of you will appreciate. :-) Is this a great lens? No. Is this a reasonably good lens at a fantastic price? Yes. Selling at almost a third of its Canon equivalent, its quality is respectably about 2/3 of the more expensive lens. So on pure price to performance ratio, the Tamron is a winning budget lens and deserves serious consideration mainly if price is an issue to you. Note too that second hand values are strong - whichever lens you choose. So it definitely is worthwhile trying the Tamron first to assess its quality for yourself. Otherwise if you can comfortably afford the Canon, buy that instead - as there are definite differences in overall output quality which, frankly, are noticeable at times. This Tamron's build quality is first rate, and apart from the fact that it's a not particularly heavy lens, you'd be hard pressed to tell that this is a budget zoom at all. Yet when it comes to output on my Eos 40D, the said differences between the lenses become apparent. In particular, compared to its far more expensive rival, there are two areas where overall quality is compromised: Colour reproduction and sharpness. Colours are restrained at best and otherwise somewhat lifeless. Vibrancy is definitely compromised at this price point, and there is sometimes noticeable chromatic aberration which is absent from photos taken with the Canon. On a more expensive lens this would not be acceptable, though at this price it's most definitely excusable. Having said as much, I still rate the lens highly - purely because it is, without any doubt, so cheap; and definitely not a waste of one's finances when there is such constant demand for these lenses. At the time of my writing this review, the Tamron is comfortably achieving 90-95% of its new price - such is the market demand for a cheap, versatile, go-anywhere, zoom lens. So in summary, at its current price, it is definitely worth buying if you are on a budget and looking for an incredibly versatile lens for your Canon slr. By Mr. T. White London, UK				8/10
Great for me at distance and speed 19/09/2007 I fitted the lens and immediately photographed a moving steam train. The motion of the wheels was sharp with a whisp of steam showing at almost full zoom. The other photos were equally as good with this fast moving object. Great quality. I'm looking forward to using it for a long time. By P. C. Hart Wales UK				10/10
Terribly soft, buy a pair of lesser ranged Nikons 01/05/2007 This lens is great in most respects, ie size and handling, but optically its not so hot. In hindsight I should have bought a kit lens, then added a 70-200 or so by Nikkor. By Robert Parker Allexton, Oakham, UK				6/10