On Wed, May 14, 2014 at 8:52 AM, Chuck Norcutt <
chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> But, as I understand it, regular 4/3 lenses (not micro 4/3) will be slow
> to focus unless on an M-1. The M-1 has both contrast and phase detect
> sensors. The pother mirrorless micro 4/3 cameras only have contrast detect
> AF. Regular 4/3 lenses were designed for phase detect and are sluggish to
> respond to contrast detect. Phase detect sensors not only tell the lens if
> it is out of focus but which direction it needs to move to achieve focus.
> Contrast detect only says you're out of focus but not which direction to
> move. Micro 4/3 lenses use lightweight elements designed for fast motion
> so they can search back and forth quickly.
>
> Ask Paul about AF speed on his E-M5.
>
>
There's a definite "hunting" period with my 14-54 until it locks in.
Depends on what I'm shooting - in a concert situation, it's a pain and
often a non-starter. But for landscapes, buildings, slower-moving stuff,
I've learned.
I don't know the specs on the E-M10. The E-M1 definitely has the 2-way
focusing.
However, one thing to consider is if you already have the OM-FT adapter,
you can use the OM lenses on the MFT body.
The lens that has me all tingly is the promised Zuiko 40-150/2.8 Pro.
--
Paul Braun
Certified Music Junkie
"Music washes from the soul the dust of everyday life." -- Berthold Auerbach
--
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