Sigma 18-250mm f/3.5-6.3 DC OS HSM review
The Sigma 18-250mm f/3.5-6.3 DC OS HSM was first announced in January 2009, becoming available to buy in March the same year. It's essentially an update to the 18-200mm f/3.5-6.3 DC OS HSM, with an extended 13.9x zoom range bringing it closer in reach to the 18-270mm F3.5-6.3 VC from Sigma's great rivals Tamron. Impressively, the improved telephoto range has been accommodated with scarcely no change in size (Sigma's specifications note a mere 1mm growth in length), and only a modest increase in weight. A notable change though is the addition of Pentax and Sony to the list of supported mounts (alongside Canon, Nikon and Sigma), giving owners of these systems the opportunity to choose between Sigma's in-lens Optical Stabilization (OS) technology and their camera's in-body systems. All versions also use an in-lens HyperSonic Motor (HSM) for focusing; however Pentax owners should note that this won't work on bodies older than the K10D of 2006, which don't support SDM focus motors.
The increase in zoom range has required a substantial revision of the optical formula compared to the older 18-200mm OS. There's the same number of elements (18) which are now arranged in 14 groups, but the number of Super-Low Dispersion (SLD) glass elements has shot up from one to four, and three aspherical elements are also employed to minimize distortion. The minimum focus distance of 0.45m has been maintained, resulting in an improved maximum magnification of 0.29x. According to Sigma, the optical stabilization system now offers up to 4 stops benefit; it also detects when the camera is panning and automatically switches to operating in one axis only, which is useful for shooting moving subjects.
All of these improvements over its predecessor come at a price - the 18-250mm costs some $100/£110 more than the 18-200mm OS at the time of writing, and $220/£180 more than the older, non-OS 18-200mm (which of course gains stabilization on Pentax and Sony bodies). But it's still a bit cheaper than many of its direct competitors, including the Nikon DX 18-200mm F3.5-5.6G AF-S VR II, the Canon EF-S 18-200mm F3.5-5.6 IS, the Tamron 18-270mm F3.5-6.3 Di-II VC, or the Sony DT 18-250mm F3.5-6.3 (although the original Tamron version of the latter is a bit cheaper). So how does it stack up against its rivals in this popular area of the market?
- Approx: 28-400mm equivalent focal length range; F3.5-6.3 maximum aperture
- Available for Canon, Nikon, Pentax, Sigma and Sony mounts (APS-C/DX format DSLRs only)
- In-lens Optical Stabilization (OS) system, including Pentax and Sony versions.
- Hypersonic Motor (HSM) focusing
Angle of view
The pictures below illustrate the focal length range from wide to telephoto (on Canon APS-C, 1.6x).
|18mm (29mm equivalent)||250mm (400mm equivalent)|
Sigma 18-250mm f/3.5-6.3 DC OS HSM specifications
|Street price||• $530 (US)
• £400 (UK)
|Date introduced||March 2009|
|Maximum format size||APS-C/DX|
|35mm equivalent focal length
||• 27-375mm (1.5x DX)
• 29-400mm (1.6x APS-C)
• 31-425mm (1.7x Foveon APS-C)
|Diagonal Angle of view (APS-C)||74º - 6º|
|Lens Construction||• 18 elements / 14 groups
• 4 SLD glass elements
• 3 aspherical elements
|Number of diaphragm blades||7, rounded|
|AF motor type||• Micro-type Hypersonic Motor|
|Image stabilization||• Yes; 4 stops claimed benefit
• Automatic panning detection
|Filter thread||• 72mm
• Does not rotate on focus
|Supplied accessories*|| Front and rear caps
|Weight||628 g (22.2 oz)|
|Dimensions||79 mm diameter x 101 mm length
(3.1 x 4.0 in)
|Lens Mount||Canon, Nikon, Pentax (KAF3), Sigma, Sony|
* Supplied accessories may differ in each country or area
|Steamin' Mad by ahrensjt|
from Angered Subjects (Street Photography)
|Smile by Olymguy|
from Ultra Asian Indian Female Faces
|Space Shuttle Cockpit- by vbuhay|
from Aircraft Control Stick
If you're thinking of using Canon's sports glass on the Sony a9, think again. The ultra-fast camera slows way down when you attach off-brand glass.
The Polish town of Katowice is not known as an area of beauty, but as all photographers know, that doesn't mean that beauty can't be found if you know where to look. Mariusz Pietranek used a drone to look down on the colorful sedimentation tanks at an ironworks.
New York Times video journalist Ben Solomon spent a harrowing three weeks accompanying Iraqi Major Sajjad al-Hour as he and his men fought to retake Mosul from I.S. forces.
The 3D VR camera launched through a crowdfunding campaign in 2015 goes on sale beginning June 26.
Noctilucent clouds, a crescent moon and Venus were visible in the pre-dawn sky over Budapest yesterday. Photographer György Soponyai captured NASA's astronomy picture of the day.
Squirming pets won't sit still for photos? A Kickstarter campaign is looking to help.
Find out how Chris Burkard shifted from editorial photography to his true passions: landscapes, conservation and, of course, surfing.
The updated EyeEm app scans your camera roll and picks images that are composed particularly well, have the best quality, or highest chance of selling on EyeEm Market.
It's three years old but still a solid option for a Micro Four Thirds shooter looking for a high-quality, fast, wide-angle prime. Take a look at how we got along with it.
Tamron has announced the longest all-in-one zoom lens currently available, the 18-400mm F3.5-6.3 Di II VC HLD. Designed for Canon and Nikon crop-sensor cameras, the lens will be available in July.
When you're ready to step-up to full-frame from an entry-level or midrange camera, the choices can be overwhelming. Find out which models came out on top in our $1200-2000 enthusiast ILC roundup.
Just a guy wearing a VR headset, smashing invisible Goombas in Central Park.
NASA's Mars Reconnaissance Orbiter captured this gorgeous aerial photo of the Martian landscape. And if you look really close, you can actually see the Mars Curiosity rover in the very middle.
The city of Laguna Beach, California has provided some clarification around the kinds of photography permits it offers.
Later this year, a VR180 camera will be Joining Yi's Halo and 360 VR cameras, which will offer stereo 3D capture, yet be as easy to use and compact as a 2D camera.
Caltech researchers have developed an 'optical phased array' chip that uses time delays instead of a lens to focus the incoming light.
Pricing and shipping have finally been revealed for two highly anticipated lenses from Sigma, announced in February.
These macro photos of clouds of paint billowing through clear water might look like high-quality CGI, but they're real photographs. And photographer Alberto Seveso told us how they were made.
Facebook is testing a feature that prevents people from saving, sharing, or even taking a screenshot of your profile picture.
We've reshot the Sony a9 in our studio. The short story: it's sharper! The long story... well you can read it all here.
The collection will be officially launched during the Europeana Transcribathon Campus Berlin 2017 crowdsourcing event which will be held on 22 and 23 June at the Berlin State Library.
Light gives us some insight into the preparations for the launch of the pre-order shipments of its much anticipated L16 multi-lens camera.
OnePlus co-founder Carl Pei has confirmed in a tweet that the second lens on the back of the OnePlus 5 uses a 1.6x optical zoom and that digital zoom is used to reach the claimed 2x zoom factor.
Fujifilm recently unveiled the second in its series of affordable cine lenses, the MK50-135mm T2.9. We got our hands on it for a couple days and took it for a spin.
Leica's first attempt at an M-series digital rangefinder was rough around the edges, but set a pattern for all of the cameras that came after it. In this week's Throwback Thursday article, Barney remembers the M8.
No stranger to extreme situations, legendary climber and filmmaker Jimmy Chin talks to Outside Magazine about his career, and the challenge of filming Alex Honnold's rope-free solo climb of El Capitain.
A company backed by Android co-founder Andy Rubin is attempting to make video conferencing less terrible.
Rangefinder magazine asked five professional portrait and wedding photographers about posting on Instagram; no surprise, they got five different answers.
This captivating stop motion film was created by stripping away one layer of wood at a time. It's hard to look away.
It will enable users to simulate the presence of the sun, moon and Milky Way and see how they interact with an area's topography.