| 18-250mm f/3.5-6.3 DC OS |
| Lens Hood |
| Front and Rear Caps |
| Instruction Manual |
| 1 Year Warranty Card |
[ Corresponding Digital SLR Cameras ]
Digital
Camera Lens
18-250mm f/3.5-6.3 DC OS HSM
13.8x high zoom ratio lens designed exclusively for digital SLR cameras and incorporating Sigma’s original Optical Stabiliser function.
- 
- 
- 
- 
This high zoom ratio lens is designed exclusively for digital SLR cameras and incorporates Sigma’s original OS (Optical Stabiliser) technology. This system offers the use of shutter speeds approximately 4 stops slower. Pentax and Sony mount lenses are also equipped with the OS function as it is possible to use this with camera bodies which already incorporate a built-in anti-shake system. Four SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. The HSM (Hyper Sonic Motor) ensures fast and quiet auto-focusing. This lens has a minimum focusing distance of 45cm (17.7in) and a maximum magnification ratio of 1:3.4, making it convenient for close-up photography.
Sigma’s
own unique OS technology
This lens is equipped with Sigma’s own unique OS technology. This
system offers the use of shutter speeds approximately 4 stops slower.
It also compensates for camera shake when shooting moving subjects such
as motor sports. For Sony and Pentax mount, the OS function can be used
even if the camera body is equipped with an anti-shake function. It is
possible select either the lens’ OS system or the camera’s
own anti-shake function.
Superior image
quality
Four SLD (Special Low Dispersion) glass elements and three aspherical
lenses provide excellent correction for all types of aberrations. High
image quality is assured throughout the entire zoom range.
Reduced Ghosting
and Flare
The super multi-layer coating reduces flare and ghosting and provides
high contrast images even when the subject is backlit.
Minimum focusing
distance of 45cm throughout the entire zoom range
A minimum focusing distance of 45cm (17.7”) throughout the entire
zoom range and a maximum magnification ratio of 1:3.4 makes this lens
ideal for close-up photography.
Quiet and
fast AF
An inner focusing system and the incorporation of HSM provide fast and
quiet auto-focusing.
*AF will not function if the Pentax camera bodies do not support HSM.
Petal-type
hood
This lens is supplied with a Petal-type hood to block out extraneous light
and reduce internal reflections.
Magnification
scale
A magnification scale is displayed on the lens barrel, ensuring ease of
use.
*Vignetting
will occur if the lens is used with digital cameras with image sensors
larger than APS-C size or 35mm SLR cameras.
Lens
Construction |
18
Elements in 14 Groups |
|
Angle
of View (SD Format) |
69.3
- 5.7 degrees |
|
Number
of Diaphragm Blades |
7
Blades |
|
Minimum
Aperture |
F22 |
|
Minimum
Focusing Distance |
45cm |
|
Maximum
Magnification |
1:3.4 |
|
Filter
Size |
72mm |
|
| Dimensions |
Diameter
79mm x Length 101mm |
|
Weight
|
630g |
|
SRP |
£572.17 |
| 18-250mm
f/3.5-6.3 DC OS HSM |
SIGMA |
|
CANON |
||
| NIKON (D) | ||
| PENTAX | ||
SONY |
 |
F2
Freelance Photographer - June-July 2009 'The Sigma is a surprise. First of all, it feels very good. Although it is technically just a DC lens, it's built to EX standards. Secondly, its HSM focusing is really fast and silent. The Sigma was also a surprise optically. It is far better than my Sony 18-250mm, or the Tamron 18-250mm which preceded that. Distortion is extremely low for such a long range and, even at 250mm, full aperture sharpness is retained well. Overall, it proved a better lens than any other such design I've used. With or without OS, it would be a good buy.' |
 |
Master
Photo Digital – July/August 2009 ‘If you need a superzoom for your 50D, 500D, D300 or whatever, I can not recommend any lens more highly than this. It’s a completely different class of glass and Sigma has worked to create strengths where weaknesses were common. The 18-250mm DC OS HSM has a list price of £559.99, and while I might once have found this excessive for a ‘walkaround’ lens, with this quality on offer plus the OS and HSM refinements it’s a very fair price indeed.’ |
 |
Photography
Monthly - July 2009 ‘Tamron’s record breaking 18-270mm will deliver a good set of images… but I did find the focusing to be less assured, the zoom mechanism to lack the solidality and smoothness of the Sigma and crucially, the optical quality to be marginally less impressive than the Sigma’s. The Sigma 18-250mm, then, is our Superzoom winner. It’s nicely screwed together, offers assured focusing, sound shake reduction and decent optical quality. Worth the extra outlay and extra weight in my book.' |
 |
Photoworld
- August 2009 ‘As for results, the Sigma 18-250mm rewrites the book. It has hardly any distortion at 250mm, it’s critical sharp centrally wide open at 250mm, with no hint of the slightly ‘dirty’ overlay of aberrations present in the Sony 18-250mm at the long end. The close focus is superb, reaching 1:3.4 which is a significant gain over the 1:4 of previous designs. It also has a very flat field and once again an impossibly accurate drawing with no visible distortion. It’s no exaggeration to say that this lens could be used to copy postage stamps. Overall the Sigma 18-250mm f/3.5-6.3 DC OS emerges as the most professionally usable of all such designs from Canon and Nikon.' |
----- 
-----
-----
-----
------------ -
