I'm sure their image quality is top notch but man, lenes are getting bigger and bigger and I'm sure the IQ differences are not noticeable in 99% of uses.

such tiny hands

The two things I find annoying are when something is announced but1) no price and 2) no ship date.

How did you get the US president to hold the 5D and 14/1.8?

I think Sigma is doing an awesome job with their Art series lenses.

It seems to be that the latest lens offerings from Canon, Nikon, Sigma, and Zeiss, far outshine the meager camera body offerings these days.

They made them to build our muscles so we can use the 200-500 2.8
Sigma tired of all the crackpot reviews on Amazon

Funny the Sigma Art lenses look even better than L lenses when they are attached to the beautiful Canon bodies.

No E mount -lazy sigma

I love how people think these "Art" lenses are a blow to Canon and Nikon, I think the opposite, Canon and Nikon love this. Think about it, these are highly desirable lenses that get great press and many want them. Very often photographer's choice of a camera is based on lenses available for it. So you want the Sigma "Art" lenses, well the bodies they are made for are Canon's and Nikon' s( most people really don't want to use adapters)! I know 3 people who bought D7200s and a D500 just so they could use the 18-35mm f1.8. So Sigma is doing Nikon and Canon a huge favor and helping them maintain their market positions. Ricoh should subsidize Sigma to produce these lenses in K mount. For the K1 that would increase its sales dramatically. So, in other words, dont feel sorry for Canon and Nikon, this is a much needed boost for sales of their camera bodies and along the way, said buyers will end up buying some Canon/Nikon lenses too.

It's a great time to be a photographer. So many great players, so many lenses to choose from.

Just imagine a 14mm f1.8 full frame lens a couple years ago, people would have said "stop dreaming, that will never happen". And yet here it is.
With a bit of luck, it will be cheaper than Canon's 14mm f2.8 L while being more than twice as fast.

More choice is never a bad thing, there was a massive price drop on 3 Zeiss lenses following Sigma's announcement ($400, $623 and $951 off on the 18/3.5, the 15/2.8 and the 135/2).

Quote " In laymen's terms, this means that autofocus should be just as fast, and just as accurate in both portrait and landscape orientations."
I think you are wrong in your explanation. Orientation does not affect the gravitational forces as the glass elements move parallel to the ground in both instances. Where it can have affect is if you point the camera to the ground or upwards to the sky. Than the motors need to overcame the weight.

Too bad they (Sigma) doesn't care about Sony's A-mount cameras any more. I would have loved to try the new Art lenses.

Hats off to Sigma's engineers. They have been launching some good stuff.
For those complaining of lugging heavy weight gear, just use your phone.

Combat Photographer Nick Nolte in the movie Underfire cannot run with these demons. BTW, Underfire was the best photojournalism movie ever .... EVER ! This was the movie that Nikon showed their mettle ... unfortunately ... after 100th year anniversary .... they are now underfire.

Would you be kind to ask Sigma when we get some of the new lenses including these 4 for Sony A-mount?

They are really wanted!!

I try not to comment on the,reasons why some equipment is made to a high standard and size, sorry there's a but, what on earth were Sigma thinking of? I mean if you want to give someone a hernia then they've gone the right way about it. Why are they so big?....could imagine a great give away from sigma...there you go sir, congratulations on choosing the 24-70 you also get a lovely lens case and a forklift truck....a fork...what hell for? ...to carry it sir..

When did photographers get so dainty? I can't believe how many people complain about the size and weight of lense like this, which were designed for holding nothing back in the department of image quality. Comparing them to a Zeiss, which is only manual focus, these lenses are comparable in size and they are autofocus.

If you're a serious pro, there's probably a good chance you own a 70-200 f/2.8 lens. This lens is smaller and lighter than those lenses...so stop. Haha

One of the reasons I don't own any Sigma lenses.
The Zoom turns in the opposite direction.
When working under pressure and things must happen there is no time to think of the lens mounted and the direction you must turn the zoom ring. It must just happen.
Nikon user. But I am deffnately going to try the 135mm

When is Sigma going to bring out lenses for Fuji's X-Mount? I'd be glad to have the 18-35/1.8 for my Fuji!

That thing is HUUUUUGE. Jeezus, seriously, it better bring the Andromeda galaxy in up close.

Would you be kind to ask Sigma when we get some of the never lenses including theese 4 for Sony A-mount?

They are really wanted!!

I hope that's a child's hand, holding those lenses.

It's so great to have more choices and competition out there that really push the envelope. Props to Sigma for their all of their hard work!

I look at lenses like these Sigmas and drool a bit. I think to myself, "I should pick up a FF body just so I can try some of these Sigma Art lenses and find out what the shouting is all about. In the end, though, I'm getting excellent image quality from my µ4/3 kit and the top lenses in that system. I compare the size of my Olympus 8mm f/1.8 (fisheye) to the new Sigma 14mm f/1.8 (non-fisheye) and I snap back to the reality of size, weight, and any image quality tradeoffs.

That Sigma stuff looks very very good. The size/weight is necessary to get the combination of speed and image quality. I just don't want to carry it around.

I thought that Sigma were the only one to bring a great surprise at CP+ 2017 (the 14mm 1.8).. Until I saw Voigtlander!! OMG! Not only they accepted the suggestion I made by e-mail, changing the 65mm APO exterior design, but they alse brought the best surprise for me! A lens with my favorite focal lengh, a (very) "fast" aperture and a reasonable size (which would hardly be possible if it was an AF lens): the new Nokton 40mm f/1.2! I think it will take some months before they go to the stores, but anyway I'm very excited!

If the image quality and AF speed of the Sigma are similar to that of Canon's Mark II lens, and the price is $800 or $900 less, I'd buy it in a heartbeat.

CoG with the 14mm f1.8 huge front element will be well forward, looks like it needed a tripod mount on the lens.