The Sigma 18-200 F3.5-6.3 DC OS HSM Lens incorporates an Optical Stabilizer function and is exclusively designed for digital SLR cameras. It is perfectly suitable for low-light conditions whether indoors at dusk or in the telephoto range. This system uses two sensors inside the lens to detect vertical and horizontal movement of the camera and effectively compensates for camera shake by moving an optical image-stabilizing lens group. It also automatically detects panning movement of the camera and compensates for camera shake when shooting moving subjects such as motor sports. SLD Special Low Dispersion glass and aspherical glass provide excellent correction for all types of aberrations. This lens has a minimum focusing distance of 45cm 17.7" throughout the entire zoom range and has a maximum magnification of 1:3.9. Since the inner focusing system means the front of the lens does not rotate optional circular polarizing filters and the supplied petal-type hood can easily be used. A magnification scale is displayed on the lens barrel ensuring ease of use. A zoom-lock switch mechanism is provided to prevent the lens from creeping due to its own weight. 69.3 - 7.1 degrees Sigma SD format angle of view 7 Diaphragm Blades F22 Minimum Aperture 45cm / 17.7 Minimum Focusing Distance 1 - 3.9 Maximum Magnification Petal Lens Hood Fully compatible with All Nikon Digital SLR cameras including the D40 and D40x Dimensions - Diameter 79mm x Length 100mm Weight - 21.5 ounces 610 grams
Customer Reviews
Sigma AF 18-200mm f/3.5-6.3 DC OS Zoom Lens for Nikon D40
I have used this lens with my D40 for about a month. I was concerned about the relative slowness of the lens especially at full zoom but the OS makes up for it allowing me to shoot successfully at slower shutter speeds. Optically the lens seems fine to me. It DOES autofocus with the D40. Combined with a Sigma 30mm HSM prime lens I have everything I need for most situations. This lens is significantly larger and heavier than the Nikon kit lenses. You will know that you have this 1-lb lens hanging around your neck I am very satisfied with this lens. Recommended to replace both the 18-55 and 55-200 Nikon kit lenses.
Comparing the Sigma to the New Canon 18-200mm IS Lens
Ive had the Sigma 18-200mm OS lens for several months and found it to give sharper images with my 40D than the Tamron 18-250mm non-IS/OS which it replaced. Then along comes the new Canon EF-S 18-200mm f/3.5-5.6 IS their own superzoom "travel lens." I bought one to see how it compares to the Sigma. My tests show mixed results regarding image quality. With both lenses wide open the Sigma wins at the wide end from 18-24mm especially away from the center while the Canon wins at the 135-200mm long end also especially away from the center. The Sigma is f6.3 wide open at 200mm while the Canon is f5.6. This is only a small difference but it does give the Canon even more advantage at 200mm where shutter speed needs to be the highest. Both lenses auto-focus accurately no front or back focus although the Sigma is slower to lock focus in low light and is a little noisier in getting there. Their IS/OS are equally effective at about 3 stops of compensation. Build quality size and weight are about the same and both use the same 72mm filter size. Sigma includes a lens hood while Canon wants to sell you one. In summary the Canon is slightly better for me due to the faster and quieter low-light focus and improved telephoto image quality. The trade-off is poorer image quality than the Sigma for wide angle shots even after stopping down. Finally the Sigma lens costs about $200 less than the Canon at this time.
great daytime walk around lens
I bought this lens when i bought my Canon XSi back in May. Its a great "walk around" lens. it covers a huge spectrum of range. For daylight photography and with a flash it works very well. My only real complaint is that its heavy and a little big... but this is expected with the 18 to 200 range. IS works very well. At the 150 to 200mm range there is a noticeable difference between IS turned on and Off. pared with the canon 50mm f 1.4 i think i have all the glass ill need for a while. now its just a matter of learning how to use it well.
Product Details
- Brand: Sigma
- Model: B000NOSCGW
- Released on: 2007-08-10
- Dimensions: 3.10" h x 3.10" w x 3.90" l 1.34 pounds
Features
- 18mm to 200mm high-zoom-ratio lens designed exclusively for Nikon digital SLR cameras
- 2 SLD glass elements and 2 hybrid aspherical lenses correct for all types of aberrations
- Minimum focusing distance of 45cm at all focal lengths maximum magnification of 1:4.4
- Lens coating reduces and flare and ghost zoom lock switch eliminates "zoom creep"
- Measures 70mm in diameter and 78.1mm long weighs 14.3 ounces 1-year warranty
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