----- Original Message -----
From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
>
> I mention here while is crosses my mind, that I read somewhere recently,
> that the 4/3 adapter is somewhere like 0.1 - 0.3 mm too thin.
>
> Maybe the Kindai adapter is manufactured more accurately.
>
> This means that manual Zuiko lenses do not focus where the lens focus
> scale indicates; this can be an issue especially for wide-angle lenses,
> and
> longer-focus lenses.
>
A thinner mount causes more shift on wide lens due to the tiny movement from
close distance to infinity. Scale shift on tele will be less and it is not a
problem since you have to focus on screen instead of just guess anyway. The
Olympus adapter is only very slightly thinner than it should be but the
shift can help for focusing of distance object when they are not really at
"infinity". You need the left-right-center action to confirm the focus on
the screen, if there is too little room to move at infinity you cannot get a
good feel of the actual focusing position.
Actaully, you can use a small tape cut in triangle shape to make a small
pointer, stick it on the lens mount to correct the focusing distance. The
error on 4/3 adapter is already much less than the modern AF lens, the scale
on the modern AF zooms I have tried were much far away, like the C*non
28-135 IS, S*gma 17-35, M*nolta 24-85 even the DZ 11-22 is not accurate at
the short end (11mm), there is almost 2mm different from normal.
> Actually, I am getting increasingly frustrated with the E-1 and manual
> Zuiko
> lenses; I find it quite difficult to get well-exposed shots with it and
> them (they
> are usually over-exposed), and attaining sharp focus is a real issue.
> Elsewhere I have mentioned my frustration with latitude. I take my hat
> off to
> CH Ling for his marvelous set of demonstration shots with a wide range of
> Zuikos on a (?C*n*n) digital. I don't know how he managed them.
>
Thanks for your praise, with the 10D I shoot at -1 stop or more. The RAW
image will be then adjusted in Capture One. Due to the low noise of 10D you
have nothing lost but get a lots of room for adjustment. For E-1 you have to
be more careful about under too much, since the noise in E-1 is higher but
an error of +1/-2 at ISO100 can be easily adjust back to normal without
objectionable noise.
C.H.Ling
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