[rollei_list] Re: Meters and Film
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Thu, 3 Sep 2009 13:50:24 -0700 (PDT)
Thanks again Richard, I'll work on it this week end.
Carlos
--- El jue 3-sep-09, Richard Knoppow <dickburk@xxxxxxxxxxxxx> escribió:
> ----- Original Message ----- From: "Carlos Manuel Freaza"
>
> It could still have a contact problem despite
> Harry's ministrations. Its worth at least removing the meter
> and cleaning the contacts. When cells go bad they start by
> becoming non-linear as I posted earlier. If the meter is
> wrong all over its likely to be something other than the
> cell especially if the error is constant at all light
> levels. If the meter is accurate for low light levels _at
> the cell_ but has an error for high light levels, its likely
> the cell. Very old cells become inactive or nearly so. As an
> example, I have a very early Weston (probably about 1937)
> which hardly reads at all. Ive checked this one for wiring
> or contact problems. Another Weston of about the same
> age seems to be perfectly accurate. I also have about four
> General Electric meters of both the PR-1 and earlier
> version, all have bad cells. One of the PR-1s has gone bad
> in the last year. I also have an original Norwood Director
> with a bad cell. All have about the same symptoms. I think
> the fact that some old meters survive is a matter of the
> history of the meter or, perhaps, manufacturing variations.
> After all all these guys are sixty years old at minimum.
>
> --
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
> ---
> 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
>
>
Yahoo! Cocina
Encontra las mejores recetas con Yahoo! Cocina.
http://ar.mujer.yahoo.com/cocina/
---
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:
