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Term - Filter factor 2 |
| Filter factor 2 | SWPP Photographic Glossary | Monday 18th January 2021 |
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Filter factor 2The number by which an unfiltered exposure reading must be multiplied to give the same effective exposure through the filter. This compensates for the absorption of light by the filter. This process is unnecessary with TTL metering systems as long as the filter is attached during the metering process.
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