Because the LED for the in-focus AF point does not light up when using the
focus confirmation chip.
--
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Chuck Norcutt
Sent: 27 June 2008 13:26
To: olympus@xxxxxxxxxx
Subject: [OM] Re: which OM to 4/3 adapter???
Why can't you tell which AF point is in focus? I only use the center point
anyhow.
Chuck Norcutt
Piers Hemy wrote:
> Scott has already answered as well as I could have done on the
> adapter, Mike.
>
> As far as the IS goes, 135mm is 135mm, set the E-510 to the actual
> focal length of the lens.
>
> And as regards the focus confirmation chip, I wouldn't bother, prtly
> because of the new firmware, as you say, and also because there is no
> way to tell which AF point is in focus! Sure, you could inspect the
> viewfinder image - but if you can do that, you can focus manually anyway,
a whole lot quicker!
> Also keep in mind that both flavours of chip (Russian and Chinese)
> take up space in the lens throat, and lenses with projections into the
> lens throat - either glass, or horns to protect the rear element - may be
unusable.
>
>
> --
> Piers
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