What Is This Tool?
This converter allows you to transform luminance measurements from millilambert (mL), a unit used in cinematography and photographic imaging, to the blondel, an early 20th-century obsolete photometric unit. It helps in interpreting and reconciling historic luminance data with modern standards.
How to Use This Tool?
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Enter the luminance value in millilambert (mL)
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Select millilambert as the input unit and blondel as the output unit
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Click the convert button to see the equivalent value in blondel
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Use results to analyze or calibrate legacy luminance measurements
Key Features
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Converts luminance values from millilambert (mL) to blondel quickly and accurately
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Supports legacy data interpretation in imaging, cinematography, and lighting engineering
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Uses a straightforward conversion formula: 1 millilambert equals 10 blondel
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Browser-based and easy to use without installation
Examples
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2 millilambert [mL] equals 20 blondel
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0.5 millilambert [mL] converts to 5 blondel
Common Use Cases
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Specifying display and projector screen luminance in cinematography and broadcast engineering
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Characterizing photographic prints, film, and lightbox luminance in imaging laboratories
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Converting historical or obsolete luminance measurements to enable comparison with modern units
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Researching early photometric data and lighting engineering literature
Tips & Best Practices
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Always confirm the context of your legacy luminance data before conversion
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Use the conversion formula 1 mL = 10 blondel for straightforward linear conversions
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Cross-reference converted results with SI units such as candela per square metre for precision
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Be mindful of differences in historical measurement standards when analyzing results
Limitations
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Both millilambert and blondel are obsolete units replaced by candela per square metre in SI
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Conversions assume linear relationships but may vary due to historic measurement context
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Accuracy depends on understanding legacy definitions and may require supplementary calibration
Frequently Asked Questions
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What is a millilambert?
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A millilambert (mL) is a non-SI unit of luminance equal to one thousandth of a lambert. It measures luminous intensity per unit area into a unit solid angle and is used mainly in cinematography and imaging labs.
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What does the blondel measure?
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The blondel is an obsolete photometric unit of luminance named after André Blondel, formerly used in early 20th-century photometry to assess the brightness of surfaces before SI units became standard.
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What is the conversion rate between millilambert and blondel?
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The conversion rate is 1 millilambert equals 10 blondel, allowing users to convert legacy luminance data for comparison with historical standards.
Key Terminology
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Millilambert (mL)
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A non-SI luminance unit equal to one thousandth of a lambert, used to quantify luminous intensity per unit area.
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Blondel
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An obsolete luminance unit named after André Blondel, formerly used in early 20th-century photometry.
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Luminance
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A measure of luminous intensity emitted or reflected from a surface per unit area into a unit solid angle.