Some interesting figures just measured with my 24/2, 50/1.4 and 85/2:
24/2, from infinity to F4 (DOF scale), the lens extended 0.14mm at F8 the
lens extended 0.29mm.
50/1.4 from infinity to F4 (DOF scale), the lens extended 0.12mm at F8 the
lens extended 0.25mm.
85/2 from infinity to F4 (DOF scale), the lens extened 0.14mm at F8 the lens
extended 0.27mm.
Allowing for some errors in reading the tiny DOF scale, the movement is
roughtly double from F4 to F8, 24/2 and 85/2 almost have the same extension
within the same DOF coverage.
C.H.Ling
----- Original Message -----
From: "C.H.Ling" <chling@xxxxxxxxxxxxx>
> 0.3mm is a big number, with a Zuiko 24mm, 0.3mm different in lens to film
> distance means a distance scale change from infinity to the position
> between 6 feet and 3 meter. Even 0.1mm different will create something
> like 1mm displacement in distance scale.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxx>
>>
>> I think it highly unlikely that the Oly 4/3 adapter is "too thin" or
>> that the Kindai is manufactured more accurately. 0.1mm would be a gross
>> error for even the sloppiest machine shop. Even if the adapter was off
>> by 0.3mm in thickness I doubt seriously that such a small positioning
>> error could be detected at the gross level of the focusing scale.
>>
>> Chuck Norcutt
>
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