GR as light meter for film?

Discussion about Ricoh GR

GR as light meter for film?

Postby waynew » Wed Apr 01, 2015 5:00 am

Aloha! I have a GRD V which I'd love to use for metering 120 film. I've been scouring the interwebs for information on the accuracy of the GR's meter as it relates to film. Does anyone happen to know? It seems many digitals run 1/3 - 1 stop more sensitive at any given ISO. Thanks for any help! -Wayne, Pahoa, Hawaii
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Re: GR as light meter for film?

Postby autochrome » Wed Apr 01, 2015 11:36 am

Hi (Aloha) !
You can buy a grey-chart (A4 size is good)
You see on the GR wat's it say when you shoot the chart.
You take somme pics of the chart with 120 Film-Camera,with B & W film
One right on the GR Speed/Fstop combination.
One up 1/3 _ One uP 2/3 _ One UP F1
One Down 1/3 _ One Down 2/3 _ One Down F1
You Process the film.You can Look the good combination....
Regards.
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Re: GR as light meter for film?

Postby 33dollars » Wed Apr 01, 2015 6:38 pm

Think autochrome's onto something here,
Film doesn't have a WB. I just use a light meter normally for film.
But would like to check my digital cameras against my light meter someday.
My light meter won't work at night.
A digital camera with a screen on the rear will tell you something. Or you could always take another shot with digital.
Films being film would need an extra stop I believe.
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Re: GR as light meter for film?

Postby waynew » Wed Apr 01, 2015 7:23 pm

Thanks to you both. I was planning to bracket anyway but was hoping to find if there's a standard deviation to use as a starting point so I can hopefully dial it in with one roll. To make things more complicated I have no idea if the shutter speeds are accurate with the Sekor 80mm. To add another layer of complexity I have a Weston Master V light meter that I also have no idea about its accuracy. So I'd like to meter with the GR and Weston and note any differences (but only actually use the GR's recommendations,) and so hopefully calibrate both the old light meter and camera at the same time. I suppose if my first roll looks like mud I will try the gray card approach.
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Re: GR as light meter for film?

Postby 33dollars » Thu Apr 02, 2015 4:02 am

This is how I check a hand held light meter

How to check if the meter is reasonably accurate.
Make sure that the pointer is reading zero with the cell covered with your hand. If not, adjust with the screw on the base. Point the meter to a clear north sky at any time between 10 A.M and 2 P.M.(northern hemisphere) Southern sky (southern hemisphere) There must not be any clouds or haze. This should translate to f/16 at 1/100 or LV 15, with film speed set to ASA/ISO 100.

Its about as accurate as you can get because B&W film is very forgiving.
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Re: GR as light meter for film?

Postby autochrome » Sat Apr 04, 2015 2:11 pm

33dollars wrote:Think autochrome's onto something here,
Film doesn't have a WB. I just use a light meter normally for film.
But would like to check my digital cameras against my light meter someday.
My light meter won't work at night.
A digital camera with a screen on the rear will tell you something. Or you could always take another shot with digital.
Films being film would need an extra stop I believe.


Hi
it's a mistake,i do missunderstod..
in my country,120 camera is a photo-camera "Rollei-type"
sorry for mistake..
Regards
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