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
Super macro photographer Can Tuncer captured these incredible close-ups of a single peacock feather using a special setup and three different microscope lenses.
After successfully crowdfunding the Biotar 75mm F1.5, Oprema Jena is at it again. This time they're bringing back the Biotar 58mm F2: the world's only lens with a 17-blade aperture.
Adobe's move to a subscription model is treating it very well indeed. The company has posted record revenue for the second quarter in a row, hauling in a mind-boggling $1.84 billion.
More details have emerged about the potential sale of Blackstone's 45% stake in iconic camera brand Leica.
Popular mobile editing app Snapseed just got a major update that includes a new interface and 11 new presets for both Android and iOS, as well as adding the Perspective tool to the iOS version.
It might sound like a strange idea, but taking macro photos of boiling water can actually result in some really cool photographs. A good photo experiment for a rainy day.
The database was created to "break with the narrow lens through which history… has been recorded" by equipping those who commission photography with "the resources to discover photographers of color available for assignments.
Lensbaby has released two new optics for their special "optic swap system." The Lensbaby Sweet 80 Optic gives you that trademark sweet spot of focus, while the Creative Bokeh optic gives you 9 different drop in aperture plate options to play with.
TechCrunch has already posted their review of the upcoming iPhone 8 (not yet the iPhone X), and they're calling it "a look into the augmented future of photography."
Affinity Photo is a $50 photo editing software with no subscriptions. That's it – pay for it once and you're done. And we think it's actually pretty darn good.
Instagram is currently testing a major change to the app's profile layout: replacing the 3-photo across grid with a 4-photo grid... and some users are NOT taking the news well.
A report by USSRPhoto is shedding some light on the return of the famed Zenit camera brand. It seems the full-frame mirrorless camera they're working on will be made in part by Leica using components from the Leica SL.
According to a reliable Korean report, Samsung is developing a smartphone sensor that's capable of super slow motion. Translation: Samsung's next batch of Galaxy smartphones may be able to shoot 1,000fps.
This simple photograph of a seahorse and Q-tip has taken the internet by storm. We spoke to photographer Justin Hofman about how it was captured, and what it means to him.
After a massive leak last week, Profoto has officially debuted the Profoto A1: the company's first on-camera flash system that they're calling "the world's smallest studio flash."
"When the first hyperfocal distance charts were designed, someone decided that an acceptably sharp background contained some blur — enough to notice in a medium-sized print [...] After that point, nearly every other hyperfocal chart followed suit."
The Canon EOS Rebel SL2 (also known as the EOS 200D) is the company's impressively compact entry-level DSLR. Packing a 24MP APS-C sensor, DIGIC 7 processor and Dual Pixel AF, it promises a lot of bang for the buck. And while not mind-blowing, it handles most tasks very well.
Correct these four common composition mistakes and your photos will be more balanced, tell a better story, and lead your viewer's eye where you want it to go.
The rugged, compact 360° action camera Kodak unveiled at Photokina in 2016, the Kodak PixPro Orbit 360, is finally available in the United States.
iOS 11 launches tomorrow, and it'll save all of your pictures in a new high efficiency image format called HEIC. Fortunately, there's now a converter that will let you turn those photos back into JPEGs.
Photo protection company ImageRights recently released a new service that lets non-subscribers take advantage of their streamlined copyright registration system that checks for errors and fills out all the required forms for you.
What's the difference between a $200 circular polarizing filter and a $100 circular polarizing filter? Roger Cicala at Lens Rentals put six different filters through a few tests to find out.
A flurry of leaks reveal that GoPro's upcoming Hero6 will shoot 4K at 60fps, 1080p at 240fps, will cost $500, and is scheduled for announcement/release on September 28th.
Before he became the iconic director whose name we've all heard, a teenage Stanley Kubrick struck up a business relationship with New York’s Look magazine. No surprise: he was an incredibly talented photographer.
WD's new G-Technology G-Drive mobile SSD R-Series is a portable solid state option for photographers who want the reliability of an SSD in a rugged water and dust-resistant package.
Fast, stabilized and affordable is an appealing combination when it comes to lenses. With its latest 24-70mm F2.8, Tamron aims to upgrade autofocus speed and stabilization. We've got a full gallery from this updated full-frame zoom.
Photographer Clay Cook tells the story of his most ambitious photographic dream and career goal coming true: photographing A-list actress Jennifer Lawrence.
In an interview with a Chinese website, Nikon Japan's Director of Development dropped a bombshell, saying that a Nikon mirrorless camera "must be full-frame."
Here's a side-by-side spec comparison of two flagship devices with particular attention to the things that really matter – at least to people who prioritize photography features.
A month and a half after revealing the finalists of the 2017 EyeEm Awards, the photo sharing community and licensing marketplace has finally revealed the winners.