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Re: [OM] Broken Meter

Subject: Re: [OM] Broken Meter
From: "John A. Lind" <jlind@xxxxxxxxxxxx>
Date: Wed, 29 May 2002 12:29:31 -0500
At 03:33 5/29/02, Albert wrote:
I'm in San Francisco right now, visiting my penpal of 6 years from singapore, who came here to the states.. This is the first time we met face to face... And the meter on my Om1n is broke :-( Is this murphy's law? Is there anything I can do to fix it myself, or not really?? Hmm.. at least it's a mechanical camera, so I can still take pictures with it.. I guess it's sunny16 for me tomorrow... But a working meter is a lot more accurate.. arrrg...
Albert

With color negative, it's not that critical . . . if in doubt, overexpose slightly. Here's the "Sunny-16" rule with how to compensate for less than direct sunlight:

For average "frontlighted" subjects . . .

1. Bright or hazy sun with distinct, sharply defined shadows. Sun is either direct or sharply outlined through the weak haze: 1/(film speed) @ f/16

2. Weak hazy sun with soft shadows; sun is visible, but diffusely outlined in heavier haze: 1/(film speed) @ f/11

3. Cloudy bright with no shadows; sky overcast or in shadows from scattered clouds; sun can be located as a bright spot in the clouds: 1/(film speed) @ f/8

4. Heavy overcast; sky completely covered with thick clouds; no bright spot revealing sun location, however no extremely dark areas from "storm clouds" either: 1/(film speed) @ f/5.6

5. Open shade; in shade from large nearby objects (e.g. buildings), but not from overhead. Lighted by about 60 degrees or more of unobstructed sky: 1/(film speed) @ f/4

6. Deep shade; under overhead shade with near zero skylighting (e.g. under tree[s]) but not shaded from indirect daylight on more than one side: 1/(film speed) @ f/2.8. If under forest canopy with little indirect daylight except what filters through trees: 1/(film speed) @ f/2. This is a difficult exposure to estimate.

7. Correction for 1-2 above on light sand or snow: reduce exposure by one stop due to high ground reflectivity.

8. Correction for 1-2 above for sidelighted close-ups (entire subject 1/3 - 2/3 sidelighted): increase exposure by one stop.

9. Correction for 1-2 above for backlighted (3/4 - fully backlit) close-ups that nearly fill the frame: increase exposure by two stops. For backlit at a distance (sunlit background): increase exposure by 1 - 1.5 stops to keep from completely blowing out the background; subject will be slightly darker.

-- John


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