topic Re: Focus pulsing issue with canon eos r10 in EOS DSLR & Mirrorless Cameras

Focus pulsing issue with canon eos r10

Ilias_laz — Tue, 21 Mar 2023 17:23:52 GMT

Hello, I was using an old canon eos 50d with a sigma 17-50mm f2.8 ex dc os hsm, and both worked great (this lens is especially sharp). Recently I decided to invest in mirrorless system as I had read that with ef to rf adapter my ef lenses would work great. Unfortunatelly when I am using this lens with r10 I get a massive pulsing issue when I am focusing with servo mode. I am very dissapointed because there was not any list of compatible third party lenses with new mirrorless cameras. Canon just told that ef lenses would work as good as with dslr cameras. Is there a solution to this problem?

Re: Focus pulsing issue with canon eos r10

rs-eos — Tue, 21 Mar 2023 17:33:04 GMT

What specific EF to RF adapter did you purchase?

Re: Focus pulsing issue with canon eos r10

Ilias_laz — Tue, 21 Mar 2023 17:47:38 GMT

The official canon adapter, it was on sale along with the camera. I have other lenses too, some of them facing the same issue. My canon ef 50mm f1.8 stm and canon ef-s 55-250 stm are working great with r10. My sigma 10-20 f4-5.6 ex dc os hsm has some minor focus pulsing issues. Sigma 105mm f2.8 ex dg os hsm worls fine but not as fine as canon lenses and my tamron sp af 200-500mm f4-5.6 di ld if has also focus pulsing issue. I undestand that new mirrorless cameras have a different focus mechanism but I am very dissapointed with the fact that canon didn't informed customers about potential incompatibility with specific lenses.

Re: Focus pulsing issue with canon eos r10

shadowsports — Tue, 21 Mar 2023 17:56:38 GMT

Greetings ,

The 17- 50 is dated and not a sigma global vision lens. I'd be very surprised if it worked properly on a mirrorless camera, even when used with a Canon branded adapter.

Re: Focus pulsing issue with canon eos r10

Ilias_laz — Tue, 21 Mar 2023 18:00:42 GMT

I agree with that but how should I have known this before as canon didn't mention anytning? I feel scammed from canon

Re: Focus pulsing issue with canon eos r10

Ilias_laz — Tue, 21 Mar 2023 18:33:51 GMT

If canon had inforned customers that not all ef lenses would work fine on rf cameras I would be ok with that and thinking twice before switching to mirrorless. But now I bought a new camera to find out that some of my lenses are not compatible and not wornikg properly. Shadowsports replied above that this lens is old but this is an excuse to the problem as there is not newer aps-c zoom lens with f2.8. Even canon's 17-55 f2.8 is older than sigma lens.

Re: Focus pulsing issue with canon eos r10

rs-eos — Tue, 21 Mar 2023 19:06:31 GMT

Canon would only test their own lenses though. Using third party products can lead to compatibility issues; be it hardware or software.

Re: Focus pulsing issue with canon eos r10

kvbarkley — Tue, 21 Mar 2023 19:26:13 GMT

For the lenses that support it you can see if they have any software updates to make them more compatible with the R's.

Re: Focus pulsing issue with canon eos r10

shadowsports — Wed, 22 Mar 2023 04:43:28 GMT

Hi IIias_laz,

This has been brought up elsewhere. I don't know if we can provide you with an answer you will be satisfied with. I do not see how its Canon's responsibility to ensure a 3rd party lens or hardware works with their product or device, unless claimed. The same way its not Sigma's responsibility to ensure a Canon product works on one of their cameras. If you put a 3rd party product on a Sigma camera body, would you expect Sigma to be sure or even know if it worked? Unfortunately, not. They didn't make it or have any control in its design.

Canon does tell you what lenses work with their adapters:

Usable Lens Canon EF lenses
Excludes RF lenses, EF-M lenses, CN-E lenses (EF cinema lenses)

If you visit Sigma's website for the 17-50, there is nothing there that says what cameras or body's this lens will work with. It states compatible mounts are x, y, z. They do not call out what it does or doesn't work with.

Sometimes things work well together, and sometimes they don't. Canon's lenses work with Canon's body's. Canon does publish a compatibility matrix with the majority of their camera's telling you what Canon products and accessories work together and what doesn't. They cannot be responsible for other products they do not control or manufacturer.

Would it be great if all 3rd party lenses worked with every body Canon, Nikon, Sigma, Panasonic, Sony, etc made. Of course, but its not possible and no where do any of these manufacturers claim they do so.

I own Sigma glass myself that worked great with other Canon bodies I've owned. Some work well adapted, and others not so much. Would I like them to work 100%, yes. Is it Canon's fault if they don't, I don't believe it is. This is my personal view. I understand your disappointment and am sorry you feel deceived.

Re: Focus pulsing issue with canon eos r10

Ilias_laz — Tue, 21 Mar 2023 19:54:43 GMT

What you are saying is common sense, every company tests their own products, I don't expect canon to test all available lenses ever made. But DID canon inform customers that third party lenses may not work properly with new mirrorless cameras? I've loved canon all these years and now I was planning to invest more on canon r system, even on full frame bodies and lenses. But to be honest I am disapointed from canon's customer treatment. Instead of trying find a solution you are trying to say that it was my fault expecting new canon cameras to work well with old ef lenses, without previous beeing clear from company that there may be a compatibility issues. Thanks for your time replying to my post but now I unestand how in canon treat their customers.

Re: Focus pulsing issue with canon eos r10

rs-eos — Tue, 21 Mar 2023 20:20:16 GMT

Why would Canon or any company be required to mention 3rd party compatibility for new products that they introduce? The onus is on the 3rd party companies.

e.g. Apple wouldn't test every conceivable piece of hardware that could be attached to a new Mac every time they release a new model.

Re: Focus pulsing issue with canon eos r10

deebatman316 — Tue, 21 Mar 2023 20:35:44 GMT

The Sigma 17-50mm F/2.8 EX DC OS HSM doesn't support the Sigma dock for software updates. Since it's an older lens hence "EX" in the name. The lens the OP mentioned above also DOES NOT work properly on the EOS 90D either. So it's not an EF-RF Mount adapter problem. Some 3rd Party EF lenses don't play nicely even on their native mount.

Re: Focus pulsing issue with canon eos r10

kvbarkley — Tue, 21 Mar 2023 23:35:35 GMT

You don't need the dock, you can send it back to Sigma or Tamron if an update is available.

Re: Focus pulsing issue with canon eos r10

deebatman316 — Tue, 21 Mar 2023 23:58:06 GMT

I know that older lenses could be re-chipped but I don't known about this lens.

Re: Focus pulsing issue with canon eos r10

Waddizzle — Wed, 22 Mar 2023 03:58:38 GMT

@Ilias_laz wrote:
The official canon adapter, it was on sale along with the camera. I have other lenses too, some of them facing the same issue. My canon ef 50mm f1.8 stm and canon ef-s 55-250 stm are working great with r10. My sigma 10-20 f4-5.6 ex dc os hsm has some minor focus pulsing issues. Sigma 105mm f2.8 ex dg os hsm worls fine but not as fine as canon lenses and my tamron sp af 200-500mm f4-5.6 di ld if has also focus pulsing issue. I undestand that new mirrorless cameras have a different focus mechanism but I am very dissapointed with the fact that canon didn't informed customers about potential incompatibility with specific lenses.

Not all Canon EF lenses are fully compatible with all features of MILC bodies. I have not looked through the R10 manual, yet, but manuals for previous cameras, like R through the R5, included a page that listed Canon EF lenses that were fully compatible with the MILC body when using the Canon EF-RF adapters.

No mention is made about any third party lenses because Canon does not test compatibility with third party lenses. That responsibility resides with the third party lens manufacturers, not Canon.

In my experience with Sigma lenses and Canon DSLRs, the “OS” in Sigma lenses has a tendency to get into a tug-of-war with Canon DSLRs. Autofocus would go on a hunting expedition.

Please note, the DSLR bodies had a much lower maximum fps than Canon MILCs. The focus pulsing looks like a high speed version of the same tug-of-war focus hunting seen with Canon DSLRs.

There was a simple fix for it. Disable the OS in the Sigma lens. Problem solved.

Re: Focus pulsing issue with canon eos r10

shadowsports — Wed, 22 Mar 2023 04:13:22 GMT

@Ilias_laz wrote:
Instead of trying find a solution you are trying to say that it was my fault expecting new canon cameras to work well with old ef lenses, ....

Respectfully. No where does rs-eos imply or say anything is your fault.

Re: Focus pulsing issue with canon eos r10

shadowsports — Wed, 22 Mar 2023 04:39:56 GMT

The 17-50 is a dated lens now and as I mentioned, not gobal vision which are the only lenses supported by the Sigma Dock. The lens is now EOL and sigma won't service it. Upgrade it, change its mount etc. I had the 17-70, but let it go, admit reluctantly when I moved to full frame. I may have been lucky with my copy, but it was truly one of my favorites.

Re: Focus pulsing issue with canon eos r10

Waddizzle — Wed, 22 Mar 2023 13:11:47 GMT

As I pointed out above, Canon does include a list of fully compatible EF lenses in the User Manuals. I want to add that no EF lenses with initial release dates prior to 2009 are supported.

Re: Focus pulsing issue with canon eos r10

deebatman316 — Wed, 22 Mar 2023 21:03:19 GMT

I own this lens too along with an EOS 40D which are still working but have been retired. Before I decided on a new camera whether that be APS-C and Full Frame. I tested this lens on the EOS 90D which is the successor to the EOS 40D by many years. This lens doesn't work properly with that camera either. It pulses rapidly when OS was enabled or it would miss focus. It also didn't focus well in Servo AF very well. It also had problems in low light requiring a speedlite with the AF Assist Beam enabled. I ultimately went with the 5D Mark IV since I owned a few L lenses anyway.

Re: Focus pulsing issue with canon eos r10

deebatman316 — Wed, 22 Mar 2023 21:48:32 GMT

1st Party EF lenses released prior to 2009 do work. But certain features such as support for Movie Servo AF & 12 FPS don't work. Canon has a list of lenses that support the above mentioned features. My dad's old EF 70-210mm F/4 & my old EF 28-135mm F/3.5-5.6 IS USM lenses work when adapted on an R series body via the EF-RF Mount adapter. All functions such as aperture control, AF & IS work. As you said certain features won't work ie Movie Servo AF.