Thanks. I think you are correct about the E-M5 and contrast detect
autofocus. Even when an m43 Zuiko lens is installed there is no focus
confirmation signal (audio or visual). What the camera does do (if you
have it enabled) is automatically magnify the previously autofocused
image to allow manual fine tuning of the focus in the viewfinder. Even
this can't happen (automatically at least) with an MF lens since the
camera can't get any signals from the lens.
Chuck Norcutt
On 1/18/2014 9:03 AM, Frank Wijsmuller wrote:
> My understanding is the E-M5 won't be able to give focus conformation with
> a manual focus lens, as that is principally impossible using only contrast
> AF. Contrast AF is based on selecting the 'best' sharpness (contrast!)
> after moving the focus very fast around the point the camera assumes you
> want to focus on, in a camera controlled way. No MF lens can be controlled
> like that.
>
> Maybe an E-M1 with a chipped 43 adapter could focus confirm (since it has
> the phase AF needed for it on sensor), but I can't tell you. Any E-M1
> owners on the list?
>
> Best, Frank
>
>
> 2014/1/18 Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
>
>> I feel embarrassed to even ask this question since I should know the
>> answer. Someone on another list asked me if the E-M5 will signal focus
>> confirmation when using manual adapted lenses such as OMZs. I have put
>> OMZs on my E-M5 only twice and probably not for nearly a year. I don't
>> recall hearing or seeing a focus confirmation signal but then I don't
>> specifically recall hearing of seeing focus confirmation even when using
>> m43 Zuikos. I suspect that it doesn't (probably doesn't even know
>> there's a lens mounted) but then I wondered why my m43->OMZ adapter
>> doesn't have a focus confirmation chip and thought maybe it's because
>> its not needed.
>>
>> So I went to grab an OMZ lens and the m43 adapter only to recall that
>> the adapter is in the lens bag of my Orion 500/5.6 mirror lens along
>> with its T2->OM adapter. Unfortunately, the Orion bag is nowhere to be
>> found amongst the photographic things I brought to Florida. I hope it
>> is still setting on the floor in my "office" back home where I had set
>> it out to be sure I wouldn't forget to bring it. It's upsetting since I
>> had planned to bring that long lens specifically to shoot the nesting
>> eagles not too far away.
>>
>> So can any of you E-M5 owners answer the question?
>>
>> Thanks,
>> Chuck Norcutt (who will order another adapter today)
>> --
>> _________________________________________________________________
>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
>> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
>> Themed Olympus Photo Exhibition: http://www.tope.nl/
>>
>>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|