[rollei_list] Re: OT: cds vs. selenium
- From: aghalide@xxxxxxx
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 07 Aug 2007 14:46:59 +0000
zone 6 with palm up (maybe even zone 7) in bright light, and zone 5 in
not-so-bight light (maybe zone 4) . Also roman numbers should be used for
zones. Also also, higher zones should be controled with film development when
possible. This is what I learned from Minor Whight, who taught me this in 1956.
Ed
-------------- Original message from eroustom@xxxxxxxxxxx: --------------
> 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"
> > 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 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!
> > > >
> > > > ---
> > > > Rollei List
> > > >
> > > > - Post to rollei_list@xxxxxxxxxxxxx
> > > >
> > > > - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
> > > > in the subject field OR by logging into www.freelists.org
> > > >
> > > > - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
> > > > 'unsubscribe' in the subject field OR by logging into
> > > > www.freelists.org
> > > >
> > > > - Online, searchable archives are available at
> > > > //www.freelists.org/archives/rollei_list
> > > >
> > >
> > > ---
> > > Rollei List
> > >
> > > - Post to rollei_list@xxxxxxxxxxxxx
> > >
> > > - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
> > > in the subject field OR by logging into www.freelists.org
> > >
> > > - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
> > > 'unsubscribe' in the subject field OR by logging into www.freelists.org
> > >
> > > - Online, searchable archives are available at
> > > //www.freelists.org/archives/rollei_list
> > >
> > >
> >
> >
> > --
> > Be Just and Fear Not
> > ---
> > Rollei List
> >
> > - Post to rollei_list@xxxxxxxxxxxxx
> >
> > - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
> > in the subject field OR by logging into www.freelists.org
> >
> > - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
> > 'unsubscribe' in the subject field OR by logging into www.freelists.org
> >
> > - Online, searchable archives are available at
> > //www.freelists.org/archives/rollei_list
> >
>
> ---
> Rollei List
>
> - Post to rollei_list@xxxxxxxxxxxxx
>
> - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
> in the subject field OR by logging into www.freelists.org
>
> - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
> 'unsubscribe' in the subject field OR by logging into www.freelists.org
>
> - Online, searchable archives are available at
> //www.freelists.org/archives/rollei_list
>
Other related posts:
