Patent: Sigma 24-70mm f/2.8 DG OS HSM Art

[Canon Rumors]

A lens we all expect to see from Sigma sooner or later has finally appeared in a patent. It looks like we’ll be seeing a 24-70mm f/2.8 DG OS HSM Art some time in 2016.</p>
<p>Patent Publication No. 2016-38502 (Google Translated)</p>
<ul>
<li>Published 2016.3.22</li>
<li>Filing date 2014.8.8</li>
<li>Zoom ratio 2.74</li>
<li>Wide-angle intermediate telephoto</li>
<li>Focal length 24.85 50.00 68.00</li>
<li>F-number 2.92 2.92 2.93</li>
<li>Full angle of view 2ω 83.71 45.71 34.33</li>
<li>The image height Y 21.63 21.63 21.63</li>
<li>The total lens length 150.73 167.12 178.30</li>
</ul>
<p>If Sigma releases a 24-70 f/2.8 OS Art series lens along with the much hyped 85mm f/1.4 Art in 2016, there will be a lot of happy photographers.</p>
<span id="pty_trigger"></span>

 

[MintChocs]

Any ideas on the weight of this rumoured lens?

 

[Wizardly]

Working example 1: 14.2 mm image height (APS-C)
18.68-289.02 mm (18-290 mm)
f/3.5-6.5 (f3.5-6)
view angle 76.04-5.52°
length 144.42-230.67 mm

Working example 2: 14.2 mm image height (APS-C)
17.61-67.48 mm (17-70 mm)
f/2.93-4.12 (f/2.8-4)
view angle 79.75-23.42°
length 123.86-163.74 mm

Working example 3: 14.2 mm image height (APS-C)
18.65-48.3 mm (18-50 mm)
f/2.92 (f/2.8)
view angle 76.15-32.43°
length 134.79-157.79 mm

Working example 4: 21.63 mm image height (135 format)
29.2-288.5 mm (29-290 mm)
f/3.64-6.51 (f/3.5-6)
view angle 74.66-8.29°
length 150.55-232.42 mm

Working example 5: 21.63 mm image height (135 format)
24.81-101.3 mm (24-100 mm)
f/4.11-4.14 (f/4)
view angle 84.18-23.44°
length 152.01-192.25 mm

Working example 6: 21.63 mm image height (135 format)
24.85-68 mm (24-70 mm)
f/2.92-2.93 (f/2.8)
view angle 83.71-34.33°
length 150.73-178.3 mm

Working example 7: 21.63 mm image height (135 format)
24.85-68 mm (24-70 mm)
f/2.91-4.13 (f/2.8-4)
view angle 83.77-34.31°
length 146.2-180.49 mm

 

[slclick]

My guesses:

More $ than the Tamron SP but less than the L Mk2 of course, possibly $1299
Better vignetting and AF speed and accuracy than the Tammy but only slightly.
Big
Black
Heavy
Beautiful
82mm filter

 

[davidj]

Will the last vendor to deliver a 24-70/2.8 with image stablization please stand up?

It's not out yet! Maybe Canon will release theirs with the new 5D (and a new and improved 24-105 with the new 6D)...

 

[Sabaki]

Probably one of those "more bang for your buck" deals versus the Canon with fantastic performance that's slightly less than the Canon's.

 

[slclick]

Probably one of those "more bang for your buck" deals versus the Canon with fantastic performance that's slightly less than the Canon's.

Well it goes without saying that the AF performance (both speed and accuracy) will not be up to the Mk2 L's but image quality could be right there.

 

[Sabaki]

Probably one of those "more bang for your buck" deals versus the Canon with fantastic performance that's slightly less than the Canon's.

Well it goes without saying that the AF performance (both speed and accuracy) will not be up to the Mk2 L's but image quality could be right there.

I agree 100%. The quality of lenses these days from all manufacturers are quite phenomenal.

The ball is very much in the buyer's court. Ultimate, all round performance? IS for video? Money is a consideration? We will all decide what fits our wants and needs.

I love my Canon 24-70 mkii. What a new Sigma has to deliver to make me sell it is probably impossible currently.

 

[slclick]

Probably one of those "more bang for your buck" deals versus the Canon with fantastic performance that's slightly less than the Canon's.

Well it goes without saying that the AF performance (both speed and accuracy) will not be up to the Mk2 L's but image quality could be right there.

Yeah I think you're good.

I agree 100%. The quality of lenses these days from all manufacturers are quite phenomenal.

The ball is very much in the buyer's court. Ultimate, all round performance? IS for video? Money is a consideration? We will all decide what fits our wants and needs.

I love my Canon 24-70 mkii. What a new Sigma has to deliver to make me sell it is probably impossible currently.

 

[wallstreetoneil]

Sigma, please weather seal the lens ro I will not buy it. This is a Pro lens that has to be weather sealed - has to be.

 

[FramerMCB]

My guesses:

More $ than the Tamron SP but less than the L Mk2 of course, possibly $1299
Better vignetting and AF speed and accuracy than the Tammy but only slightly.
Big
Black
Heavy
Beautiful
82mm filter

I doubt highly that it will autofocus quicker or more accurately than the Tammy. Tamron has proved since the introduction of their refreshed 70-200mm f2.8 tele-zoom that they are doing better than Sigma with autofocus implementation and their version (VC) of image stabilisation. That said, this Sigma should still be a stellar performer. And hopefully perform a little better than the Tamron or Canon in the corners, edge sharpness, and vignetting.
Exciting times for photo pros and enthusiasts alike...! 8)

 

[FramerMCB]

Will the last vendor to deliver a 24-70/2.8 with image stablization please stand up?

uh...that would be Tamron. Or were you being a little more tongue-in-cheek than literal? ???

 

[j-nord]

Will the last vendor to deliver a 24-70/2.8 with image stablization please stand up?

uh...that would be Tamron. Or were you being a little more tongue-in-cheek than literal? ???

I believe he's referring to Canon not having a 2.8 IS version yet. Nikon, Tamron and now Sigma will have one.

 

[j-nord]

It's going to take some pretty good performance, size and weight to get me to drop the 24-70 f4 IS for it.

 

[slclick]

My guesses:

More $ than the Tamron SP but less than the L Mk2 of course, possibly $1299
Better vignetting and AF speed and accuracy than the Tammy but only slightly.
Big
Black
Heavy
Beautiful
82mm filter

I doubt highly that it will autofocus quicker or more accurately than the Tammy. Tamron has proved since the introduction of their refreshed 70-200mm f2.8 tele-zoom that they are doing better than Sigma with autofocus implementation and their version (VC) of image stabilisation. That said, this Sigma should still be a stellar performer. And hopefully perform a little better than the Tamron or Canon in the corners, edge sharpness, and vignetting.
Exciting times for photo pros and enthusiasts alike...! 8)

It a copy to copy issue with the Tamrons more so than the Canons. My Tamron experience has been far worse than my Sigma... AF, vignetting, contrast. YMMV

 

[DLD]

My guesses:

More $ than the Tamron SP but less than the L Mk2 of course, possibly $1299
Better vignetting and AF speed and accuracy than the Tammy but only slightly.
Big
Black
Heavy
Beautiful
82mm filter

I doubt highly that it will autofocus quicker or more accurately than the Tammy. Tamron has proved since the introduction of their refreshed 70-200mm f2.8 tele-zoom that they are doing better than Sigma with autofocus implementation and their version (VC) of image stabilisation. That said, this Sigma should still be a stellar performer. And hopefully perform a little better than the Tamron or Canon in the corners, edge sharpness, and vignetting.
Exciting times for photo pros and enthusiasts alike...! 8)

Tammys qc issues and decentering are legendary. Have hardly read a review where they don't experience this issue. Which has put me off Tamron so far. I've had multiple Sigma Art lenses, all fantastic. Auto focus is a bit slower than Canon however. But nothing that usually really matters. Sigma claim rubber gaskets actually contribute to internal fogging which is why they don't put them on their lenses, may just be an excuse I haven't researched it...

 

[Mt Spokane Photography]

Sigma has previously stated in one of their interviews that they were trying, but could not promise one. A patent generally means nothing as far as predicting a actual product. The patent was submitted 1.5 years earlier from development work done before that, but production in quantity at a reasonable price is not always possible.

So we know they are trying.

 

[DLD]

We hope they manage, I would like one if it is in fact sharp. I wonder what the delay is with the 85mm art though? It seems to be in fact the most anticipated lens from Sigma. I would love a 200mm 2.8 macro lens also.

 

[danielm]

I'd guess 82mm filter size? Would be nice if the patent was linked to...

 

[Mt Spokane Photography]

I'd guess 82mm filter size? Would be nice if the patent was linked to...

The source (Egami) is linked to on the Canon Rumors Home Page. I am not aware of a way to link to the actual Japanese Patent. You have to go to the Japanese patent site and enter the patent number.

http://egami.blog.so-net.ne.jp/2016-03-28

What you will find is a bunch of Japanese with text translated to English (well, sort of). The images are not translated.

The patent is actually a optical formula, and multiple examples of a possible lens are given. Egami picks one that they believe will draw the most traffic to their site.

If you want a better view of the patent, go Here:
https://www4.j-platpat.inpit.go.jp/eng/tokujitsu/tkbs_en/TKBS_EN_GM101_Top.action

Enter the patent number on the 2nd line in the 2nd column. Then click on the hyperlink which will bring up the patent summary. The Detailed Description will bring up all the Text, and there is a link to diagrams as well. This should have you happily reading and checking the calculations for a week or so

The patent number to enter is 2016-38502

BTW, the Japanese site gives a much better translation to English than Google, but it still leaves you wondering.