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Will Canon's FF Mirrorless be EF or EF-M Mount?

Started Dec 27, 2017 | Polls thread
PWPhotography Forum Pro • Posts: 11,877
Re: From nontechnical perspective ...

pawn wrote:

The Fat Fish wrote:

Hi all,

A couple of months ago I asked what mount you wanted for Canon's upcoming professional full frame mirrorless camera. The majority voted for EF although it was close. What I want now want to know is what you now think it will be, not what you want it to be.

So, what mount do you THINK it will be?

From a non-technical perspective, it has to be EF so that people can leverage a large collection of EF lenses that they already have.

Question: if EF-M mount is used and that EF-M --> EF adapter is used, what are the down sides of using EF lenses on EF-M mount FF mirrorless besides the added size of the adapter?

https://www.dpreview.com/opinion/5187078750/maintaining-a-legacy-or-building-for-mirrorless-who-benefits

Not that simple, check the above DPR article. EF lenses were designed and optimized for the separate AF/AE sensor, not the main image sensor thru mirror/OVF. It doesn't make much sense to continue on the legacy system just per sake of mirrorless with a big compromise of performance. It has to be on a new system, a pure mirrorless mount EF-M and the new mirrorless lenses need to be designed from scratch.

In addition Canon has lots of work for such system. DPAF is still not good for AF-C tracking. Canon needs to put PDAF on the sensor as all other non-Canon mirrorless cameras do and cover larger portion of sensor with AF points. DPAF also impacts DR (despite Canon also has sensor-side ADC) and posts a huge challenge to move double amount of pixels around, one of reasons 5DsR doesn't have DPAF that otherwise needs to move 100mp data around. Then advanced EVF, IBIS, eye-AF, BSI, stacked-sensor design...Canon is a bit late in mirrorless camp and lots need to capture up. ML established companies, Sony, Fuji, Olympus, Panasonic don't stand still and also quickly moving forward.

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