Sigma 18-200mm f/3.5-6.3 DC Lens for Pentax and Samsung Digital SLR Cameras Right now

I had this lens for one week, and it is perfect for travel,
and when you don t know what where you are going to take pictures,

the built quality is excellent (as sigma does usual)
and it is very compact and light for a large range lens.

just not very sharp pictures at 18mm,
but with this kind of lens it is well known
and it is still better than the kit-lenses 18-55mm that I have.

if you see the concurrence : bigger, more bulky,
sometime the telephoto-lens increase by itself if you chose the wrong position...
and it can resist if you want to change focal between 18 and 200mmm,
with this one: you have NOT these problems !!!
of course there you can find more rage (18-270 for example),
but for me 18-200 is enough and also it is more compact,
there is no stabilization and ultra-sonic focus but,
first, the stab is not needed if you have a Pentax SLR,
and second, the ultrasonic-focus is more expensive
and not always needed and increase the size of the lens.

for me this lens is excellent with my Pentax K10D and my Pentax k-x
.... and by the way, this lens is not expensive at all.Get more detail about Sigma 18-200mm f/3.5-6.3 DC Lens for Pentax and Samsung Digital SLR Cameras.

Lowest Price Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens for Sony Digital SLR Cameras

I love this beast of a lense. Great and fast!! People have written about noise issue, but I have not really noticed it yet.Get more detail about Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens for Sony Digital SLR Cameras.

Low Price Tamron AF 18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro Zoom Lens for Sony Alpha Digital SLR Cameras

Most of my lens purchases have been Tamron and they have not let me down yet. This lens is awesome from 18 - 250mm my old 28 - 300mm probably won't be used much anymore. Just wish I had bought this lens sooner you won't be sorry in making the purchase. The only thing I do not like is the lens barrel will slide out unless you keep the lock engaged but I have gotten used to it so it does not interfere with my enjoyment of the lens.Get more detail about Tamron AF 18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro Zoom Lens for Sony Alpha Digital SLR Cameras.

Save Tamron AF 200-500mm f/5.0-6.3 Di LD SP FEC (IF) Lens for Canon Digital SLR Cameras

Soft contrast, specularities on the edges. Great for surveillance bad for prints above 5 x 7.Get more detail about Tamron AF 200-500mm f/5.0-6.3 Di LD SP FEC (IF) Lens for Canon Digital SLR Cameras.

Discount Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens for Nikon SLR Cameras

Every Nikon owner knows the best lenses are made by Nikon, but it isn't always possible to spend over a thousand dollars for one. This 70-300mm lens by Sigma hits a nice price point for a fairly decent lens. I've used it in many different situations - full daylight, concerts at night - and it performs well. At full zoom, you can turn your mediocre seating into front row images, but make sure you have a steady hand. You will get camera shake at full zoom in low light situations unless you're perfectly still.

The macro on this lens is shockingly good. It only works at 200-300mm, which means you have to be a few feet away to use it, but images tend to be very crisp. You'll want to pair the lens with a decent flash, however, if you aren't in full sun.

This Sigma isn't as crisp and pure as a true Nikon lens, but it's a great alternative for the amateur and/or hobbyist.Get more detail about Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens for Nikon SLR Cameras.

Cheapest Opteka 67mm Close-Up Set (+1, +2, and +4) with 10x Macro Lens for Nikon D90 D80 D70s D70 D50 D40x D40 D700 D300 D200 D100 D2Hs SLR Digital Camera

I found the optical elements to be "okay" but the rings are awfully cheap-stuff when it comes to attaching it to the lens or one another.
I would rather have spent my money with better quality extenders.Get more detail about Opteka 67mm Close-Up Set (+1, +2, and +4) with 10x Macro Lens for Nikon D90 D80 D70s D70 D50 D40x D40 D700 D300 D200 D100 D2Hs SLR Digital Camera.

Cheap Canon EF 70-300mm f/4-5.6 IS USM Telephoto Zoom Lens + Deluxe Accessory Kit

If you are looking for a good lens this is the one. I took picture of a hummingbird..... The clearest pictures..Get more detail about Canon EF 70-300mm f/4-5.6 IS USM Telephoto Zoom Lens + Deluxe Accessory Kit.