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| Reciprocity Failure
Compensation |
Because
film emulsion has issues with very long and very short
exposures (reciprocity failure) it is necessary to compensate
for the exposure.
Reciprocity Failure Compensation for long exposures:
Indicated
Exposure |
X Compensation |
Acutal
Exposure Time |
1 Second |
X 1.25 |
= 1.25 Seconds |
5" |
X 1.5 |
= 7.5 " |
15" |
X 2 |
= 30 " |
45" |
X 2.5 |
= 1 minute
52 Seconds |
2 Minutes |
X 3 |
= 6 Minutes |
5 " |
X 4 |
= 20 " |
10 " |
X 5 |
= 50 " |
20 " |
X 6 |
= 2 Hours |
40 " |
X 8 |
= 5.5 Hours |
Emulsions may vary times. |
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