The EF mount is logical from an adapted point of view. However as the
optics are the same, an OM Zuiko that doesn't fit a dedicated OM
speedbooster won't fit an EF speedbooster either. It is about larger tabs
to protect the rear element, so it can be solved (but I won't try ;-).
I spotted a Viltrox Chinese speedbooster equivalent with EF contacts on
eBay. It will probably have some compatabiltiy (and quality?) issues, but
still.. 1/3 of the MB price.
2016-05-19 22:10 GMT+02:00 Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>:
> Nor would it do you much good if you did have EF mount Canon lenses. The
> Zongyi thing has no way to control aperture on EF lenses, they'd always be
> wide open. No way to do autofocus either so the lens must necessarily have
> manually operated focus control. I'm not sure that all do.
>
> Chuck Norcutt
>
>
>
> On 5/19/2016 1:21 PM, Piers Hemy wrote:
>
>> Correct, Chuck.
>>
>> I do not have any EF mount lenses, but I have OM to EF adapters, and as
>> you
>> say, the EF mount is fit for almost any mount adapter.
>>
>> Piers
>> On 19 May 2016 2:35 p.m., "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
>> wrote:
>>
>> So you buy the Canon EOS/EF to whatever adapter to minimize the lens
>>> registration distance and then add whatever adapter will adapt a MF lens
>>> to
>>> Canon EF? Seems to me that would be the only use for the EF version
>>> since
>>> there's no way to control the aperture of an AF Canon EF lens.
>>>
>>> Chuck Norcutt
>>>
>>>
>>> On 5/16/2016 11:31 AM, piers@xxxxxxxx wrote:
>>>
>>> Send me the 85/2, Joel, and it will be my pleasure! That is the one Zuiko
>>>> I
>>>> never got to have, and I sold my 100/2.8 last year (as well as the
>>>> 180/2.8
>>>> and 300/4.5, all to the same buyer!)
>>>>
>>>> I took a look at the specifications, and reckon that a 50/1.4 is a
>>>> reasonable stand in, especially if set to minimum focus. So here they
>>>> be:
>>>> http://www.hemy.me.uk/Miscellany/P1150343.JPG
>>>> http://www.hemy.me.uk/Miscellany/P1150344.JPG
>>>> http://www.hemy.me.uk/Miscellany/P1150345.JPG
>>>>
>>>> You will notice that I did not invest in the real thing, a Metabones
>>>> adapter for the simple reason that they were not available for EOS to
>>>> FX,
>>>> and I specifically wanted to go that route to maximise the options
>>>> available to me (not that I have ever had a single C@non lens). So the
>>>> Zhongyi it had to be, despite it being very nearly half the price of the
>>>> Metabones EOS to OM.
>>>>
>>>> Piers
>>>>
>>>> PS I have already taken a guess at the follow up question, and refer you
>>>> to
>>>> my " anthropogenesis" response to Chuck the other day.
>>>>
>>>> --
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