Summary: This is a very good lens for fullframe cameras, works well on subframes that have drive-motors as well...just one caveat with it, it's not light. Very sharp and reasonably fast and clear for a superzoom but it's a pocket full of change. you can check the specs on slrgear.com this lens is 550g vs 430g for the Tamron 18-250 which is the equivalent lens on a Sony with body-IS And that extra 120 grams is really noticeable on a light camera.
Summary: I started by looking at the Tamron 70-300mm and then thought about the many times I've lost shots while switching lenses. No need to switch with this lens and I ended up spending less than if I'd bought two. Eventually, I will buy a dedicated f/2.8 lens in the 15-50mm range; but for now, the flash takes care of those problems.
Pros: Consistent Output, Fast / accurate auto-focus
Summary: This is a very good lens to carry if you have a smiple project and you don't want to carry many lenses. It is exactly why I got this lens. Now there are some good things and some not very good things about this lens. Pro: 1. Versatile and lightweight 2. Wide range between wide angle and tele (mostly if you're doing full frame or film cameras) not so much in APC and small digital. 3. Good camera manufacturer 4.
Excerpt: This is a decent all around, carry anywhere lens. Would have loved if it was faster but for its price it is good. It has the biggest zoom range of any available lens for my D60. VC works great and is probably better than Nikon's VR. It does make some noise when VC is active but I can live with that.
Pros: Compact Design, Easy To Use, VC, Versatile as they get
Summary: Bought this lens for Canon 5dmk2 as a relatively cheap cover-all while visiting South Africa. I'm pleased with the resulting photos tho the shutter is significantly loud - in a way this was advantageous when photographing the so-called "Big Five" since the first exposure attracted their attention. I'm in no hurry to swap back to my canon lenses.