[rollei_list] Re: OT: cds vs. selenium
- From: eroustom@xxxxxxxxxxx
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 07 Aug 2007 14:13:06 +0000
Just like everything else... I've been told one stop, as the palm of just about
any hand is zone 6.
That's what's great about photography: no answer is right, and the confusion
can only be settled with yet another roll of film, or two.
E.
-------------- Original message ----------------------
From: "Gene Johnson" <genej2ster@xxxxxxxxx>
> metering the palm of my hand in the same light as the subject, and
> adding two stops of exposure has always been a good start for me.
>
> On 8/6/07, ERoustom <eroustom@xxxxxxxxxxx> wrote:
> > Thank you. That makes sense now.
> >
> > Elias
> >
> > On Aug 5, 2007, at 11:14 PM, Marc James Small wrote:
> >
> > > At 10:44 PM 8/5/2007, ERoustom wrote:
> > > >> I suspect that part of the canard of inaccuracy comes from the
> > > >> reality that we have institutionally forgotten that a selenium
> > > >> meter needs to be used differently from the manner in which a CdS
> > > >> or later meter is employed. LEARN how to use a selenium meter and
> > > >> it is perfectly suitable.
> > > >
> > > >Could you give a novice a hint or two on the differences in using the
> > > >two?
> > >
> > > Selenium offers a metering material which more closely matches the
> > > response range of chemical emulsions than do later materials such
> > > as CdS, SPD, or Gallium Arsenide. But selenium requires a wider
> > > acceptance angle -- no one has yet manufactured a one-degree
> > > Selenium spot meter!
> > >
> > > Accordingly, you have to average a good deal. This generally
> > > requires more attention to what is being metered coupled with
> > > sweeping the meter up and down and side to side to obtain an
> > > average reading. The reading so obtained should be quite usable.
> > >
> > > Marc
> > >
> > >
> > > msmall@xxxxxxxxxxxx
> > > Cha robh bàs fir gun ghràs fir!
> > >
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