Great Walk Around Lens
935979
I'm really happy with this lens. I previously used the Tamron 16-300 but I think this one is sharper and better focused at 300mm than the Tamron. I use this as my walk around lens and find very little that I cannot do with it except I wish it would be 400mm. :) The price was right and I would buy this one again.
873491
I wanted a walk around lens to replace the kit 18-55 canon lens. The reviews that I read were not very good but for $350 there is not much to choose from. I was pleasantly surprised when I did some tests at home at different focal lengths and F stops and the Tamron did a lot better than the kit 18-55 lens! I then compared it to my canon 28-135 USM IS lens and they were pretty comparable in image quality!!

The only down side to this lens (the only reason it is not getting 5 stars) is the poor focusing speed in low light. Apart from that it is way better than the standard lens that comes on the canon rebels.
2435196
This lens (which I bought used) takes great shots on my Sony SLT.  The 18-200 range is of course terrific, and for an all-in-one walkabout lens I'm very impressed by the level of detail captured in the images.  Unlike a lot of the recent Sony lenses, this one is made like a tank - without the cheap, light plastic that seems to characterize many new Sony alpha lenses.  The lock switch prevents lens creep when it is hanging around my neck, which is handy too.  While it probably doesn't take as high quality images as a thousand dollar lens, for the money it is a no-brainer.
4861965
Nice action on the focus ring, razor-thin depth of field. Not much larger than my 28-280 that I walk around with, which makes it relatively easy to bring along on trips. I was worried that there might be some chromatic aberration with a mirror-style lens, but everything I've shot with it so far looks nice and crisp. With this size and this cost, it's kind of a no-brainer to pick up this lens if you ever want to shoot deep zoom shots.
1509445
I was urged to buy this lens through both other reviews and a personal friend. She uses this for portrait work, something I don't do, but it interested me because of the quality of the focus. My shots are predominately nature macro, and this lens is fantastic in that area. Not much heavier than my 35 mm fixed and so worth the effort of carrying down the trail even on longer hikes. (I do have a wonderful rig for doing so)
This photo is right out of the camera and taken on an overcast day with the bird squawking at me so it was a snap and go shot. I think it does a great job.
2761667
For a long time I've been waiting for Canon to create a lens that is ideal for general walking around/travel. In the past the lenses were either not long enough (the 28-70L is wonderful, but on a full frame the 70 is a little short) or not good enough for my needs (the 28-135 is solid - but its slow and doesn't have the resolving power needed for todays full frame dSLRs). Finally Canon created the 24-105 and my back and neck thank them!

Overall the lens is a winner - it does all the little things quite well under decent conditions. Its fast enough (with at least a little light) the vignetting isn't too bad, the distortions wide open aren't bad and the image quality is simply astounding. Now is it the equal of my 28-70L - no way. The 28-70 wide open, at the extremes was better and faster. Especially in low light. But if I'm walking around town or on vacation or hiking then the 24-105 is much better due to its slightly smaller weight and its greater range. Plus did I mention that the optical quality is wonderful? the IS really works (while it doesn't help if you want bokeh or to keep a faster shutter speed or in low light, it does amazing things for handholding - I'm a convert to it - 3 to 4 stops more handholding range - sign me up!)

If you are looking for a travel/everyday lens for a full frame dslr this may be the perfect lens when you take into account size, range and optical quality. Highly recommended
4598604
Great little lens. Bought this based on Ken Rockwell recommendation after I got my new D5300. It's light, compact, sharp as a tack and fast. Only taken a few hundred shots so far with it, but very pleased so far. Have used it for Landscapes, night photos and even indoors at a poorly lit gym for a volleyball match (got some great shots at 1/640).
2484645
Perfect Walk-Around Lens.  Fast AF, fairly quiet, weather-resistant, and covers an ideal focal range.  Mine is very sharp edge-to-edge, and I'm very happy with it overall on both my K5ii and K3.
1884192
Love this lens. It does have some CA along the edges at 10MM but can be corrected in post. Otherwise, very sharp. Seeing as I tend to shoot landscapes most often, this lens stays on my camera most of the time. Its a good solid lens at a great price.
4252523
This is a pretty good lens as far as "super zooms" go. In my opinion, none are very good, be they Canon, Tamron or Sigma. OK for a walk around lens though.
692311
With this lens I was able to remove my 28-90mm and my 70-300mm lenses from my bag.  I still keep my 50mm macro lens, since the tamron really isn't optimal for macro photography.  A little pricey.  I wish I would have started with this lens rather than first investing in the 70-300mm - then it would have been more cost effective.

Pros
* Excellent zoom range
* Lens size
* No more lens swapping!

Cons
* Autofocus sometimes has trouble focusing on closest object (instead choosing to focus on a background object)
* Zoom action is a little tough to turn.  Over a few weeks, this has improved.
* Zoom action is opposite direction than my Canon lenses. (you turn the lens in the opposite direction to zoom in and out) This takes a little getting used to.

I would recommend this lens to others and if I had to do it again, I would still purchase the tamron.
3726207
Great lens to use while walking around the city.  I use it on my Canon XT and the image quality is great.  Good for walking around lens very light and low profile.
1567855
But bought it anyway.  Excellent walk around lens. Was using a 28-300 which gave more range but the weight was a killer for continued use or carrying with strap on shoulder or neck.  The glass is high quality but without the off white signal of an expensive lens (which can sometimes prevent an issue depending on your location).
4653677
My walk around lens when there is enough light to walk around in.
Great clarity, versatility in a heavy slow tele.
36594
This is my walkaround lens.  Decent range with good light coverage.  Not a terribly heavy lens.  Produces sharp images.  I use this with a Nikon D7200.
2794829
I have owned and tested the Tamron 28-300mm VC zoom lens for about 2 months now.  Here is an early review from my experience so far.

Pros:
Excellent optical quality (stronger at shorter focal length)
Versatile multi-purpose walk around lens. Leave this one on your camera and no need to lug around extra lenses.
Amazing focal length range 28-300 equals to 44-480 on 1.6x crop sensor.
Compact size and light weight.
Vibration compensation works very well zoomed out and in macro shots
Solid and well built quality
Rubberize grip feels much better then most Canon lenses
Reasonable price relative to comparable lenses
Included hood
Center-pinch lens cap should be an industry standard.
Extra peace of mind with standard 6 year manufacturer warranty

Cons:
Wider angle would be nice on a 1.6x crop sensor.  If you shoot a lot of landscapes 44mm may not be enough.
In low light, indoor conditions, the f3.5-6.3 aperture means I have to increase the ISO and use longer shutter speeds to shoot brighter.
Occasionally, the AF searches a bit in low light shooting
Not a big deal but, the lens creeps (extends with gravity) when lens lock is off and the lens is pointing down.

In conclusion, the Tamron AF 28-300mm VC lens is an exceptional choice if you are looking for a general walk around lens to keep on your camera.  You can not beat the optical performance with such range from a relatively compact, light and well-built package, especially considering the price.
2747171
This is quickly becoming my go-to all purpose lens. Its been sharp and precise with taking landscape shots. Ive even used it a few times for portrait work, however I prefer a more shallow depth of field for portraits most of the time. Overall its been my main go-to travel lens.