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Canon 70-200 f4L with AF adapter on MFT?

Started Feb 28, 2018 | Questions thread
Messier Object Forum Pro • Posts: 12,720
Re: Canon 70-200 f4L with AF adapter on MFT?

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

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