Thank you Marcin, that is good information. Now, in order to set
the OM4 dioptric control to -1.5 diopters, I need to know which
position of the knob corresponds to +1 diopters, (the opposite
extreme being -3 diopters. There are 20 click stops on the knob,
presumably evenly spaced over the range of 4 diopters, i.e. 0.2
diopters per click. Then -1.5 diopters is 8 clicks from the -3.0
extreme (actually -1.6), or 13 clicks from the +1 diopter extreme.
If I use my "subjective" determination of 7 clicks counterclockwise
on the OM4T matches "standard" on the OM2n, as determined by
observing no diopter shift with different magnifications
on the Varimagni, this would lead me to conclude that the -3
diopter setting would be at the most clockwise position of the OM4
adjustment knob, +1 diopter the most counterclockwise position,
and there are 20 evenly spaced 0.2 diopter click stops on the
control.
Can anyone confirm this?
- Parzival
----- Original Message -----
From: "Marcin Kost" <kosta@xxxxxxxxxx>
> Hi!
> If I good remember the standard dioptric correction for SLR is -1.5
> diopter, it is
> to correct the distance between your eye and the "window" you look through.
> Regards
> Marcin
>
> Parzival Herzog wrote:
>
>
> > BTW, I assume the "standard" dioptric setting is 0 diopters, on the OM2n.
> > Does anyone know definitively how many clicks of the diopter adjustment
> > from one extreme is 0 diopters on the OM4/OM4T? I get 7 clockwise clicks
> > to match my visual transfer of the OM2n setting via the varimagni to
> > the OM4T. There has to be a more scientific method than that!
>
> .....
>
>
>
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