Howdy, Just pick up this light meter Weston model 853. it only shows a film speed from 8 to 125/ f stops from 0 to 32, I understand the f stops, but the speed is another thing when it only goes to 125. it seems to work ok. If there is someone out there that seen one of these and can help me understand this thing. Its nice size, that is kind of why I pick it up. On the face, it has ( for still and cine cameras ) I have check around on Google, but didn't find much. Thanks for any help
Dave F4 user
#1. "RE: weston exposure meter model 853" | In response to Reply # 0dwig Registered since 30th May 2004Mon 07-Apr-08 11:21 AM
Googling "Weston Light Meter 853" and "Film Speed Conversion Weston ASA" will yield plenty of good information.
Basically, this is a simple meter that can be used as a direct reading Cine meter and, with the use of the table on the face of the meter, an effective meter for still cameras where you have a choice of shutter speed (cine cameras generally have a fixed 1/30th or 1/50 sec exposure time per frame, depending primarily on fps). You should not that it is NOT calibrated in ASA film speeds, much less ISO. Its film speed (aka "emulsion" speed) scale is calibrated in Weston speeds. Weston speed numbers are roughly 80% of the ASA number, equivalent of about 1/3 stop. A film rated at Weston 80 would be ASA 100 and approx ISO 100.
If you want to use it with modern films with ISOs above the meter's limit of ISO 160 its a simple matter of setting the meter to an even number of stops lower than your film's ISO rating (plus the 1/3 stop ISO>Weston correction). You would then meter and mentally apply a correction to the shutter speed to correct for the "lie" you told the meter. Example, you are using ISO 400 film so you set the meter to Weston 80 (400>100=2 stops plus 100>80 for ISO to Weston correction). You would now meter to find what f/stop to use with, say, 1/125th sec and then shoot at that f/stop at 1/500th sec to correct for the 2 stop "lie" about the film speed.
nikonian in paradise
use: cp8400, cp990, cp950
retired: F,ELW, 21mm, 45 f/2.8 GN
used to own: S2, SP, F2, F3, 20mm f/3.5, 35mm f/1.4, 35mm f/2.8, 43-86 f/3.5, 50mm f/2, 50 f/1.4 (for S2/SP), 55mm f/3.5 Micro, 105mm f/2.5, 105mm f/4 Micro, 300mm f/4.5, 180mm f/4.5 (for 4x5)
#2. "RE: weston exposure meter model 853" | In response to Reply # 1dumdedum Registered since 19th Apr 2004Mon 07-Apr-08 01:44 PM
Thanks for the reply: Yep, your right about the Google info. I had look at the Model number wrong the first time, Had 855 and that was what I was looking for. Anyway thanks, think I'll stay with my other meters and the camera setting, besides the f 4 seems to more right than wrong. I got a lot of info off of Butkas web page also. Thanks again