Sigma 18-200mm f3.5-6.3 Lens For Sony Digital SLR Cameras

I did a fair amount of research before buying this lens, but I was having trouble with dirt getting into the camera as I was constantly changing a 18-55 and 50-200 lens. The reviews suggested it was much clearer than the equivalent Tamron. I have owned it for 10 months and am very pleased with the results. No point comparing it to a £900 canon or nikon monster, but it is very capable. The 200mm reach is very handy and the image quality is actually pretty good wide open at that setting. At 18mm it is decent as well, but benefits from stopping down a little. At this wide angle setting it also shows much less barrel distortion than my Pentax kit lens (but I wouldn't tell the Pentax fan-boys that ;-) More than capable for general use. Solid enough and does not seem to have too many problems with focus.

Outstanding lens for the price. Relatively small size and light weight makes this lens ideal when you're out and about. Great for street photography. Picture quality is every bit as good as more expensive lenses that I own. It's my first Sigma lens but won't be the last!

This is a good lens and good value. Works well on my DSLT and my DSLR. But I have since invested in a 300mm and the difference is amazing. This doesnt get close enough for those Wildlife/airshow pictures!

This is a quality lens but that goes without saying as you can expect nothing less from SIGMA!!Pros:Its perfect from macros to zooms, well built, smooth movement with crystal clear optics.Comes with a handy petal-hood for outdoor shooting.When zoomed in, the lens is not as large as the Tamron or the Nikkor (the latter not being applicable to Sony Alphas)Using an all-in-one lens means no fussing around detaching and re-attaching!Cons:No in-built image stabilization (like with the Nikkor's)The 'hold' button can only be used at its widest setting.

I am a non technical vacation, birthdays, and christmas snapper with the occasional pretention of spending the day with the objective of taking photographs. This then is the ideal spec lens for me. It has the range I need, it means I rarely need to put on a longer lens. So far the performance has been as I expected - the only slight irritation is the time it takes to focus in low light levels. Indeed I have found that changinging to manual focus is quicker and more rewarding.

I use two cameras and I leave this lens on one camera all the time. It is very versatile and covers most situations. At both ends of the zoom there is a slight drop off of sharpness but nothing to worry about. When I first used it the zoom was fairly stiff and this has now gone and was only because it was new. There is a switch which locks the zoom while not using it or walking with strap over neck.I am a club photographer and would recommend this and all the Sigma range.

Bought to take to New York with me to reduce the amount of kit I would need to carry. The lens is solid and feels well built. There is some vinagaretting to the edges of the shot at it's 200mm end, but in fairness it's a £200 lens not a £1000 lens. The zoom feels smooth and the AF seems quick enough.It is a sturdy "Jack of all trades" camera purchase, definitely an upgrade to the stock Sony alpha series 18-70 lens. As is the way with photography you always end up "wanting more" so if I'd had twice as much money I could have bought a lens twice a capable.

I bought the 75- 300 lens to go with the 18-75 standard lens,--.MISTAKE.This lens is more versatile & can stay permenantly on the body, the zoomis better to control & my results so far have been very acceptable for anamateur. If you get a filter remember that it is a 62mm thread