Canon 70-200 f4L with AF adapter on MFT?

Anyone here have any experience using a Canon 70-200 f4L with an autofocusing adapter on an MFT body? Can you recommend a particular adapter? I'm not looking for a speed booster, as I want the full 140-400mm EFL reach. I'd use it on a Panasonic GX8 or G85, or maybe a GH4.

Jacques , Tom the forum mod is a user of Canon adapted lenses he is also the mod in the adapted lens forum { which i just found recently }

https://www.dpreview.com/forums/1065

Jacques Cornell wrote:

Anyone here have any experience using a Canon 70-200 f4L with an autofocusing adapter on an MFT body? Can you recommend a particular adapter? I'm not looking for a speed booster, as I want the full 140-400mm EFL reach. I'd use it on a Panasonic GX8 or G85, or maybe a GH4.

Thanks, folks, for your feedback. Would be interested to hear about any other good adapters.

Hey I have the metabones smart adapter with no optics, it just carry over IS and autofocus, so you would get your 140-400. I am selling it now as I wanted a true 70-200

I had an adaptor but sold it. As others mentioned, AF is slow and unreliable. If you are willing to use MF, it does give you aperture control and the IS in the Canon lens also works.

Canon lenses need phase detect sensors to focus well. Most MFT cameras don't have that. The EM-1 and G9 have PD, but not the cameras you mentioned.  I doubt that a more expensive adaptor can compensate for the lack of PD focussing.

SamKnopf wrote:

I had an adaptor but sold it. As others mentioned, AF is slow and unreliable. If you are willing to use MF, it does give you aperture control and the IS in the Canon lens also works.

Canon lenses need phase detect sensors to focus well. Most MFT cameras don't have that. The EM-1 and G9 have PD, but not the cameras you mentioned. I doubt that a more expensive adaptor can compensate for the lack of PD focussing.

Good point. Thanks.

Wrong bodies for adapted Canon lenses. The best choice is the Olympus EM1 with the Metabones Smart Adapter.

Gonzie wrote:

SamKnopf wrote:

I had an adaptor but sold it. As others mentioned, AF is slow and unreliable. If you are willing to use MF, it does give you aperture control and the IS in the Canon lens also works.

Canon lenses need phase detect sensors to focus well. Most MFT cameras don't have that. The EM-1 and G9 have PD, but not the cameras you mentioned. I doubt that a more expensive adaptor can compensate for the lack of PD focussing.

G9 does not have phase detect, only contrast like the GH5 and other Panasonic cameras.

Camerastoretv just posted a good video on adapters.

For MFT their results were less than stellar using a metabones.

that result was only with respect to C-AF. Metabones does not claim that their adapter supports C-AF with the E-M1.2, so I don't know why that was even tested by the reviewer.

Also, the reviewer stated that C-AF would therefore be poor when using the E-M1.2 in video. That also is ignorance on his part because the E-M1.2 does not support AF (S-AF or C-AF) in video using anything other than native M.43 lenses.

So while the S-AF tests as shown are indicative of Metabones' performance with the E-M1.2 the rest of the testing and conclusions regarding M.43 are IMO meaningless.

Peter

TwoMetreBill wrote:

Wrong bodies for adapted Canon lenses. The best choice is the Olympus EM1 with the Metabones Smart Adapter.

But not for 4K video.

On my EM1-2 the AF works reliably and quite fast with the Metabones IV T adapter.