[rollei_list] Re: Meters and Film
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 2 Sep 2009 02:26:54 -0700 (PDT)
You are using excellent lightmeters Richard, anyway perhaps it could be
necessary to clarify that Luna Pro and Luna Pro F are two very different
lightmeters, Gossen was criticized to use similar names for these two models
(Lunasix and Lunasix F in Europe), the F is almost bigger than the Rollei 35,
has a Silicium Blue Cell, uses a 9v battery and shows readings putting the
needle over "0" after you took the light measurement and has the lot of
accesories I mentioned previously and takes ambient and flash readings and has
scale for the Zone system. The F has black body and then is still repaired at
factory (Gossen no longer repairs lightmeters with gray bodies).
Don Norwood was the incident light meter with hemispherical receptor inventor
in 1938, according the patent the invent objective was: "to provide an exposure
meter which is substantially uniformly responsive to light incident upon the
photographic subject from practically all directions which would result in the
reflection of light to the camera or other photographic register..."and the
meter provided for "measurement of the effective illumination obtaining at the
position of the subject." and then any incident lightmeter is a "Norwood type"
lightmeter.
I also have a Russian lightmeter "Kalimar" with CdS cell, it's very exact since
it is using the original PX 13 Mercury cell, the only problem is that the dials
became loose due to the dials axis wear, but it still works fine. The Rollei 35
lightmeter is very exact, it is using the original PX 13 battery too, my others
35mm cameras have TTL lightmeters, the Pentax P 30t lightmeter tends to
overexpose 1 f stop at ISO 100 from brand new, however it is exact for ISO 400
and faster films.
Carlos
--- El mié 2-sep-09, Richard Knoppow <dickburk@xxxxxxxxxxxxx> escribió:
> De: Richard Knoppow <dickburk@xxxxxxxxxxxxx>
> Asunto: [rollei_list] Re: Meters and Film
> Para: rollei_list@xxxxxxxxxxxxx
> Fecha: miércoles, 2 de septiembre de 2009, 12:56 am
>
> ----- Original Message ----- From: "Carlos Manuel Freaza"
> <cmfreaza@xxxxxxxxxxxx>
> To: <rollei_list@xxxxxxxxxxxxx>
> Sent: Tuesday, September 01, 2009 6:47 PM
> Subject: [rollei_list] Re: Meters and Film
>
>
> My point in my previous post was that you can do those
> three measurements and even more types with the Gossen Luna
> Pro F, perhaps this Luna Pro F is a Norwood type lightmeter
> with more accesories. My second point was that to measure
> highlights or to obtain some detail for highlights could be
> or couldn't be necessary, it depends about the subject and
> your idea about the image.
> The Luna Pro F also allows to measure the Scene Brightness
> Range, f.e. if the film can accept 2 EV Under Exposure
> to 2 1/2 EV Over exposure, your total range is 4 1/2 EV,
> then you take reflected readings for the image main area
> highlights and shadows, if these readings fall within the 2
> EV under exposure and 2 1/2 over exposure range, your
> exposure will be right, if the readings result in 3 EV
> UE and 1 EV OE you'll lose shadows details even if the EV
> variance is 4.-
>
> Carlos
>
> The only thing the Luna-Pro and other similar
> meters lack is the flat diffuser and the readings with that
> can be duplicated by making reflection measurements off a
> card. The extra attachment on the Norwood type is just a
> convenience plus it is much more limited in making reflected
> light measurements than the Luna-Pro.
> I use a Luna Pro and a Sekonic meter (and
> some others) these two agree exactly but the Luna-Pro works
> at very low light levels. Mostly I just point the meter and
> use whatever reading is shows. I also use the TTL meter in
> my Nikon F all the time and it usually produces good
> negatives and good Kodachromes.
>
> --
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
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