Third Party Lenses

Is SIGMA getting ready to announce their first RF mount lenses? [CR1]

In the next few weeks, SIGMA is rumoured to be announcing 4 new lenses for the Sony FE mount as well as their shared L mount with Panasonic and Leica.

  • SIGMA 35mm f/1.2 DG HSM
  • SIGMA 45mm f/2.8 DG HSM
  • SIGMA 12-24mm f/2.8 DG HSM
  • SIGMA 24-70mm f/2.8 DG HSM

It’s now rumoured that SIGMA will also make these lenses for Canon’s RF mount. It’s unknown if they will be announced alongside their Sony counterparts.

It’d be a good move for SIGMA to get in early on making lenses for the RF mount, as Canon’s RF lens lineup obviously needs some time to mature.

Photo Hack

Hi there
Apr 8, 2019
67
70
Just as I was getting ready to be done with Sigma after the full move to RF..... the price tag and value is always so tempting, even though I curse some of the auto focusing, especially in low light.

Curious to see how their autofocus performs on RF.... Plus making a f1.2 for Sony and an f2 zoom for DSLRs makes me wonder what they can do with RF. Hmmmmm.

We have a love - hate relationship going on here.
 
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Canon Rumors Guy

EOS 1D MK II
Jul 20, 2010
7,533
289
Canada
www.canonrumors.com
Have they been able to reverse engineer the mount already?
It seems a bit too soon for me, but maybe it doesn't take all that long to do. I haven't yet reverse engineered anything other than an omelette. Or maybe there will be some kind of development announcement and any RF mount lens releases will be in the distant future.
 

woodman411

EOS T7i
Aug 1, 2017
99
46
USA
Just as I was getting ready to be done with Sigma after the full move to RF..... the price tag and value is always so tempting, even though I curse some of the auto focusing, especially in low light.

Curious to see how their autofocus performs on RF.... Plus making a f1.2 for Sony and an f2 zoom for DSLRs makes me wonder what they can do with RF. Hmmmmm.

We have a love - hate relationship going on here.
If Tamron + adapters is anything to go by, I would say Sigma autofocus would work significantly better on the R system versus a mirrored system, with caveats as usual. On the 5d4, Tamron autofocus was hit and miss for me, and I tried the latest 24-70 f/2.8 G2, 70-200 f/2.8 G2, 35/45 f/1.8 VC's, and more time than I'm willing to admit on microadjustments (both Tamron console and in-camera). Mounted on the R with an adapter, autofocus accuracy noticeably improved, although not as good as adapted EF or RF. For example, I would aim an autofocus point with the Tamron, and it would hunt back and forth, and when I put on an EF lens, it would lock instantly on the same autofocus point, same lighting (in this specific test, I compared a Tamron 24-70 f/2.8 G2 versus a Canon 24-70 f/2.8 II). But overall, I would say on the R, the Tamron autofocus is about 85% of the autofocus speed and accuracy of an RF lens, whereas the adapted EF lenses are about 95% of the RF lens speed and accuracy, at least with the lenses I used and compared (I only have the RF 35 f/1.8 as my sole RF lens at this time).

One area though which was a disappointment with Tamrons (not sure about Sigmas), is video use. Tamron aperture is not "stepless", according to them, resulting in noticeable clicking noises as the aperture changes during video recording. The workaround is to use fixed aperture, but even then, the autofocus noise is also quite noticeable, much louder than any Canon EF lens I have.
 
Reactions: Photo Hack

Photo Hack

Hi there
Apr 8, 2019
67
70
If Tamron + adapters is anything to go by, I would say Sigma autofocus would work significantly better on the R system versus a mirrored system, with caveats as usual. On the 5d4, Tamron autofocus was hit and miss for me, and I tried the latest 24-70 f/2.8 G2, 70-200 f/2.8 G2, 35/45 f/1.8 VC's, and more time than I'm willing to admit on microadjustments (both Tamron console and in-camera). Mounted on the R with an adapter, autofocus accuracy noticeably improved, although not as good as adapted EF or RF. For example, I would aim an autofocus point with the Tamron, and it would hunt back and forth, and when I put on an EF lens, it would lock instantly on the same autofocus point, same lighting (in this specific test, I compared a Tamron 24-70 f/2.8 G2 versus a Canon 24-70 f/2.8 II). But overall, I would say on the R, the Tamron autofocus is about 85% of the autofocus speed and accuracy of an RF lens, whereas the adapted EF lenses are about 95% of the RF lens speed and accuracy, at least with the lenses I used and compared (I only have the RF 35 f/1.8 as my sole RF lens at this time).

One area though which was a disappointment with Tamrons (not sure about Sigmas), is video use. Tamron aperture is not "stepless", according to them, resulting in noticeable clicking noises as the aperture changes during video recording. The workaround is to use fixed aperture, but even then, the autofocus noise is also quite noticeable, much louder than any Canon EF lens I have.
Yeah, I struggled with the 135 ART for hours on the USB dock before sending it back. The older 50 f1.4 was junk, our 85 ART is decent in good lighting but awful in low light. Our 35 & 50 ARTs are most consistent, maybe more forgiving focal lengths has to do with it.

In the days of micro adjustment on camera, it was a real pain....seeing that we have a ton of bodies we use. We gave up on Sigma until ART came out and sold some of our older L glass for those.

Our newer Sigma Macros seem ok....but we honestly use those in manual most of the time and can’t give much feedback.

We’ve learned to just go with Canons 2.8 Zooms for all the low light work when flash is needed and call it a day.
 
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Reactions: woodman411

bellorusso

byazrov.com
Jul 29, 2014
20
12
Moscow
www.byazrov.ru
IS is a must at this point. Sigma's popular lenses without one is a very sad move. Obviously, Sigma will try to milk us twice. So I am not buying a Sigma lens without IS.
 

6degrees

RF 85mm F1.2
Sep 6, 2018
68
45
35mm F1.2
If as Canon claims that RF Mount has advantage, Sigma 35mm F1.2 Canon RF version vs Sony E version:
RF version should have better IQ, or Same IQ with cheaper price, because easy to develop/produce.
 
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Reactions: canonical

blackcoffee17

EOS 80D
Sep 17, 2014
170
143
35mm F1.2
If as Canon claims that RF Mount has advantage, Sigma 35mm F1.2 Canon RF version vs Sony E version:
RF version should have better IQ, or Same IQ with cheaper price, because easy to develop/produce.
Don't think they will design 2 different version. For DSLR they usually design for the mount which is the easiest to adapt to other mounts and keep the optical formula the same.
 

blackcoffee17

EOS 80D
Sep 17, 2014
170
143
Check DxOMark ranking. For any DSLR lens, Nikon version is always better than Canon version.
I don't trust or care for DXOMark. But i believe the difference is because of the different sensor, better DR on Nikon.
The Sigma CEO stated in an interview that they usually design a lens for the most adaptable mount, based on flange distance and other parameters.
 

jolyonralph

Kodak Brownie
Aug 25, 2015
1,075
275
49
London, UK
www.everyothershot.com
Remember not all RF lenses are going to be true RF mount. RF is a combination of a new mount and new faster protocols. Third party RF lenses are far more likely to be RF physical mount using the old EF protocols (as it would be with an adapted EF lens.) Add to this that the optical designs of the new generation full frame mirrorless lenses will be for the lowest common denominator (ie Sony FE) and you'll see Canon won't have anything to fear with this competition.
 

max_sr

EOS T7i
Jan 8, 2019
50
26
IS is a must at this point. Sigma's popular lenses without one is a very sad move. Obviously, Sigma will try to milk us twice. So I am not buying a Sigma lens without IS.
That's not really an issue, becauce the Sony and Panasonic bodies have IBIS. And those are the mounts these lenses are made for. They will of course sooner or later be adapted for the RF-mount and by that time Canon might have released a camera with IBIS as well.
 

6degrees

RF 85mm F1.2
Sep 6, 2018
68
45
I don't trust or care for DXOMark. But i believe the difference is because of the different sensor, better DR on Nikon.
The Sigma CEO stated in an interview that they usually design a lens for the most adaptable mount, based on flange distance and other parameters.
I am not sure if I should trust DxOMark. But if their results indicate significant difference, I probably should give a consideration.

After Canon RF 50mm F1.2 comes out, praise all over the places. But check these:

Canon RF 50mm F1.2 scores pretty low at 38, ranks 174 in DxOMark ranking:
https://www.dxomark.com/Lenses/Canon/Canon-RF-50mm-F12L-USM-mounted-on-Canon-EOS-R__1262

Canon RF 50mm f/1.2L vs Zeiss Otus 1.4/55 ZF.2:
https://www.dxomark.com/Lenses/Compare/Side-by-side/Canon-RF-50mm-F12L-USM-on-Canon-EOS-R-versus-Zeiss-Carl-Zeiss-Distagon-T-STAR-Otus-55mm-F14-ZF2-Nikon-on-Nikon-D800E__1995_1262_1242_814

Canon 28-70mm F2 scores even worse at 33, ranks 417 in DxOMark ranking:
https://www.dxomark.com/Lenses/Canon/Canon-RF-28-70mm-F2L-USM-mounted-on-Canon-EOS-R__1262
 

dlmartin81

EOS R
Sep 1, 2018
30
16
My guess is their lenses won't have a Control Ring. Is that a fair assumption?

Still, I'm a Sigma fan - currently own the 35 and 50 Art lens paired with the R. I would love to own Canon's RF L lenses but good Lord do you need some deep pockets! Sigma RF mount glass would be a nice compromise for sure. I've just gotten used to the Control Ring on my adaptor that it would be a shame to loose it when using 3rd party lens.
 
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blackcoffee17

EOS 80D
Sep 17, 2014
170
143
I am not sure if I should trust DxOMark. But if their results indicate significant difference, I probably should give a consideration.

After Canon RF 50mm F1.2 comes out, praise all over the places. But check these:

Canon RF 50mm F1.2 scores pretty low at 38, ranks 174 in DxOMark ranking:
https://www.dxomark.com/Lenses/Canon/Canon-RF-50mm-F12L-USM-mounted-on-Canon-EOS-R__1262

Canon RF 50mm f/1.2L vs Zeiss Otus 1.4/55 ZF.2:
https://www.dxomark.com/Lenses/Compare/Side-by-side/Canon-RF-50mm-F12L-USM-on-Canon-EOS-R-versus-Zeiss-Carl-Zeiss-Distagon-T-STAR-Otus-55mm-F14-ZF2-Nikon-on-Nikon-D800E__1995_1262_1242_814

Canon 28-70mm F2 scores even worse at 33, ranks 417 in DxOMark ranking:
https://www.dxomark.com/Lenses/Canon/Canon-RF-28-70mm-F2L-USM-mounted-on-Canon-EOS-R__1262
How can the Canon 50 1.8 get a score of 29 for sharpness compared to only 22 for the RF 50mm 1.2?
Of course it's because the 50 1.8 is tested on a 50MP sensor versus 30MP for the RF but anyone can honestly believe the
cheap plastic lens would be any sharper?
 

6degrees

RF 85mm F1.2
Sep 6, 2018
68
45
How can the Canon 50 1.8 get a score of 29 for sharpness compared to only 22 for the RF 50mm 1.2?
Of course it's because the 50 1.8 is tested on a 50MP sensor versus 30MP for the RF but anyone can honestly believe the
cheap plastic lens would be any sharper?
Good point. But Otus 1.4/55 Nikon does not score much higher than Canon 1.8/50. I assume the sensors are not much different.

Confusing.