Sigma has JUST ANNOUNCED four new ART series lenses.  I am a huge fan of the ART series, see my recent 85mm ART review - these have been incredibly sharp lenses that offer excellent value and the four newly announced lenses really round out their collection. We do not have pricing information or confirmed availability yet though my contact at Sigma states late April, early May. Press Release info below (my thoughts in bold along with my guess on cost - this page will be updated as new information become available.

Which lens in the lineup are you most excited about?

Which new Sigma lens are you most excited about?

— Toby ☉ (@photorectoby) February 21, 2017

The Sigma 100-400mm 5-6.3 DG HSM OS Contemporary

The Sigma 100-400mm 5-6.3 DG HSM OS Contemporary is a state-of-the-art telephoto zoom that brings a new level of portability and quality to the super telephoto market. Touting Sigma’s Optical Stabilizer (OS), the Sigma 100-400mm 5-6.3 Contemporary is highly compact and lightweight compared to similar products on this market. A push/pull zooming function and a new Hyper Sonic Motor (HSM) allow for a more responsive approach to photography while a 1:3.8 macro feature can be utilized from up close or from a further distance.Physical Specs -Weight 2.56 lb (1160 g)Diameter 86 mm (3.4″)Length 182 mm (7.18″)Sealing Yesfor comparison the new Canon 70-300 weighs 1.56 lb (708 g) and costs $550 and the Canon 100-400 MK II weighs  3.5 lb  (1.59 kg) and costs $2000I expect this lens to be nearly as sharp as Canon's 100-400 Mark II which costs almost double the price.  It does include weather sealing though I suspect it isn't at the same level as Canon's 100-400 Mark II and I notice an absence of a tripod color - something often desired in a longer lens as a way to give you a stable mounting point when using smaller cameras.  I am confused by the push/pull designation - this lens looks like a typical rotate to zoom - maybe you can also push/pull but there isn't much to grab onto.  Guess- around $1200  

The Sigma 24-70mm 2.8 DG HSM OS Art

The Sigma 24-70mm 2.8 DG HSM OS Art is a premium workhorse zoom lens designed for the latest high megapixel DSLRs. A constant aperture of 2.8 through the zoom range make this a highly versatile tool and a brand new Optical Stabilization (OS) system help compensate for camera shake. Though a common focal length, the Sigma 24-70mm Art brings a new level of usability and durability featuring a rugged metal barrel and an emphasis on image quality. Building off the experience from the 12-24mm Art, the aspherical elements used in the 24-70mm 2.8 OS Art undergo a highly precise level of polishing producing elements thicker in the center then on the edges. This process creates stunning image quality and beautiful circular bokeh.Canon does not have a stabilized 24-70 f/2.8 and I suspect this new ART lens will be as sharp as Canon's current 24-70 f/2.8 L and it offers stabilization and it will likely be cheaper.   Downsides? I don't see any right now as long as this lens is up to the standard of Sigma's existing ART series line. It even has a slightly smaller front filter size 80mm vs 82mm in the Canon.   On price I suspect somewhere around $1400 slightly more expensive than the Tamron version. I expect this ART to be much better than the Tamron. 

The Sigma 135mm 1.8 DG HSM Art

The Sigma 135mm 1.8 DG HSM Art is a medium telephoto prime lens designed for modern high megapixel DSLRs. A new large Hyper Sonic Motor produces significant torque to the focusing group for better speed while the acceleration sensor detects the position of the lens and compensates for such factors as gravity to help aid in focusing performance. This state-of-the-art prime lens touts a dust and splash proof construction for guaranteed performance in any condition and its large 1.8 Fstop allows for more creative control over imagery. A stunning compression effect make the Sigma 135m 1.8 Art the ideal portrait lens while its large aperture help with event photography and much more.This seems very similar in size and weight to the 85mm that I have recently tested and found to be excellent.  At 135mm you can get some incredible background separation from your subject. I will be interested to see how this compares to Nikon AF-S NIKKOR 105mm f/1.4E lens that is a little lighter and smaller but at $2100.00 likely a good bit more expensive. For wedding work I love primes at 85mm and below - above that and you may find yourself needing to move more than you want or are easily able to do in some situations BUT for portrait photographers these longer primes can offer stunningly beautiful shots.  Price Guess $1200

The Sigma 14mm 1.8 DG HSM Art

The Sigma 14mm 1.8 DG HSM Art is the world's first 1.8 prime lens at the 14mm focal length. This fast wide prime features the same large aspherical element touted in the Sigma 12-24mm F4 Art to control distortion and create stunning imagery. An updated Hyper Sonic Motor (HSM) provides fast and accurate autofocus while 3 Premium FLD and 4 SLD glass elements control chromatic aberration and sagittal comma flare. Building on the highly reputable Art line, the Sigma 14mm 1.8 DG HSM Art is designed to resolve the latest high megapixel DSLR sensors.This lens is an astrophotographers dream! That is of course hoping it is at the level of their other ART series lenses and minimizes distortion. To have a full frame lens as fast as f/1.8 gives you some awesome flexibility when shooting the night sky.  Also useful for low light receptions and documentary work. Guess - $1100.00