How to use Sigma lenses seamlessly on Canon RF via the EF-EOS R adaptor 

Why would they? Canon make the cameras and lenses that's their business so why would you then allow other companies to make similar lenses for less money? That's literally giving part of their income to other companies.

@@richard99970 because people don’t like this and will think of switching to other camera brands that don’t have this issue 🤷‍♂️. I’m using a canon r5 and I really like it but the problem that there are only a few lenses is just annoying!

@@D4rkLama to be fair the range of RF lenses are growing and the current choice isn't bad. Plus you can use the huge range of ef lenses with a converter.

Canon is rumoured to allow third party manufacturers by charging them a certain license fee.. So in the future we might end up with Sigma DG DN series of lenses I guess...

​@@richard99970here's why sir.. about an year ago i was in the market for a new camera. I had narrowed down to the sony a7iv and the canon r6ii.. in my research i found canon is the better performer. But sony allows for cheaper but high quality sigma lenses on their bodies.. guess who i went with.. the sony!! Also bought 2 sigma lenses for the price of 1 canon lens. And i am pretty happy with the performance. This decision from canon is not "saving a part of their business" but infact losing them business. I would have definitely bought the canon r6ii if it supported sigma lenses. And trust me there r probably thousands like me out there..

I've had the 150-600C for many years and briefly owned the 120-300. In my case the 600C zoom was sharper than my 120-300 copy (probably a bad copy, the contrast on it was absolutely garbage for some reason). However I agree the pulsing made the 120-300 unusable, especially being 2.8 and having such a thin DOF. Imo the 120-300 can only be considered for sports shooters who shoot from far away, and I will add, on FF cameras. The R7 is too demanding for that old lens.

Hello and thank you for your question. It sounds like it may be a firmware compatibility issue. Please make sure that the lens and camera are both using their latest software. SIGMA lenses can be updated using a SIGMA USB Dock. We have also sent your questions to the technicians at SIGMA HQ in Japan. We will let you know if they have any additional information to share.

@@sigmauk apologies guys! I had my maximum aperture set in the custom functions menu of my camera as f2.0. Sorted after changing this! Thanks again, the lens is perfect as expected

So if you aren‘t a photographer who‘s going to soll his pictures, you won‘t even see the difference without a trained eye.

I don't see why not

I have the 24-70mm 2.8 Art on my R6 and ibis works with no issues.

@@eria3069 sorry i didn’t mean the IBIS for the camera, I meant the lens stabilisation. Flick that on/off and it doesn’t help. It helps for photos, but not video and even with both, it’s nowhere near as stable as the canon kit lens I used to have.

Thanks Shinzy, we used the Sony A7Siii with a range of Sigma Art primes. Great combo!

@@sigmauk ur color grading is fab, I could never get such a beautiful look from a7s3

Thank you, I’ll pass that on to the film maker!

The crop factor depends on sensor size. On Canon APS-C sensors you "get extra reach" thanks to the crop factor. Focal lengths are ALWAYS stated as the full frame equivalent first. Even lenses designed specifically for crop sensors. For instance the Canon EF-S 24mm f/2.8 (one of my favorite lenses on my old Canon T6) would be multiplied by 1.6 to arrive at the equivalent of a 38.4mm focal length on a full frame camera. Now let's say you're shooting landscapes with a crop sensor camera and you are starting to want to get wider FOV you would DIVIDE the focal length to find out the crop equivalent for a full frame. Say you want to have an image that emulates a 21mm full-frame landscape. What focal length do you need for your APS-C sensor? Divide 21 by 1.6 to arrive at 13.125. You would need to find a lens described as 13 or 14mm.

@@jimcastile1905 so when you are on a fullframe wouldn't the adaptor still Crop the image?

​@@DanishCamp That depends on the lens. If the lens is an APS-C design then yes. If it was a Full Frame designed lens then no. The adapters themselves have no effect on crop factor.

@@jimcastile1905 the lenses in the video is aps-c no?

Does the 150-600 work properly with the 1,4 Converter as well? So using it on a EOS R, with Adapter, converter and then the lens?

​@@stefankurzinger3930 no with 1.4 x when u zoom above 500mm the af and stabilization will show problems while clicking moving animals and objects. But without 1.4 X u will face zero problems while zooming fully to 600 mm.

Yeah works absolutely great, AF is very responsive. You won’t regret it!!

Do you know if there is model number that is better then others. Looking at getting this lens while sale is currently on. Heard about the af issues from previous reviews. If there still making the lens is there a batch with s/n that is better then other's?

Hey mate, did you the bought the 150-600mm? how is it working with R6?

i think it is performing the worst on r6mk2! any news from sigma if they can at least make it behave like it did with r6? the pulsing focus is just relentless!

That’s what I came through here to find out now that I’ve had my R7 for a couple months now. I do see the issues with the R7s auto focus at times and it makes me wish I spent $200 more and just got the Sony A7IV, but updates should fix that soon

Any news?

I would like to know this too

@mickandrews9458 The Sigma EF-S 18-35mm f/1.8 DC HSM ART works perfectly with the adapter on the R7 and R5 (automatically switches to crop mode)

I just ordered this exact lens from ebay and it is currently not working. Aperture ring not stopping down. This could be a compatability issue or a faulty lens. Be careful if buying anyway

The only downside I found is size. I use the Sigma 40mm 1.4 (it is a big beast) with my R6 II and recently shot a wedding with it. It performed beautifully and I just love the 40mm focal length. Maybe RF glass is a bit faster but I have found that the 40mm on the R6 II is fast enough for a wedding so there is that. I will probably get the 28mm or 14-24mm from Sigma next. :)

​@@fffeuchtnerhi bro.. did u have any problems with af on mkii?

Is your autofocus area cropped? Or does it cover the full screen?

@@unloadedone APS-C is cropped of course but not FF sensors

Yes

Correct! It’s the camera our freelance video guy uses, along with E-mount Sigma Art lenses 👍🏻

Hmm good question Barry. Sorry you’re having that issue. First thing, check the contacts on the camera and lens are clean. If they are, I’d say updating the firmware on both the camera and lens is the next step (you need a usb dock to update the lens, or we can do it for you). If still no joy, we’d need to take a look at the lens ideally to check the contacts, but that would mean bringing it in or sending it in to us. Let us know how you get on

Had the same issue when I switched from 6D to 5D mkIV back in the days. Just had to update lens firmware (using Sigma USB dock) and the circles were gone. Maybe it's the same thing with R8?

I found solution )) I should off aberration corrections in settings of the camera))

Can you define pulsing? Not being able to focus?

@@TieitAndFlyit hi Ben, that’s correct. The Canon mirrorless RF cameras tend to pulsate in and out of focus with the Sigma lens. This has been reported to be hit & miss between Camera bodies. But mine is really bad. There’s a few RU-vid videos about this issue.

Great question! We kept the stabilisation on when testing the lenses on the Canon EOS R6.

So does the optical stabilisation work in tandem with sensor stabilisation?

My R6II doesn’t like OS turned on with the 24-105 Art. I don’t know if it’s an issue with the lens though. Sigma seems to think it’s repairable but for now I’m trying it with OS off. It’s a newly acquired used lens. I’m looking forward to RF glass in the future.