
Lume - Light Meter
Spot & cine light meter
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Free
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About
Lume is a professional light meter for film photography and cinema.
Point at the scene, lock the reading, then compose the shutter-aperture pair on click-stop wheels, the way a real meter works.
PHOTO MODE
• Reading at the centre of the frame, weighted like a TTL meter
• Aperture or shutter priority, third-of-a-stop scales
• Exposure compensation ±3 EV and ND filters up to ND1000
• 24 film stocks with reciprocity failure correction
YOUR CAMERA
• Set the shutter speeds and apertures your camera and lens actually have (e.g. 1/8–1/500, ƒ2.8–ƒ16)
• The wheels stop there, and Lume never suggests a value you can't set
• When the light asks for more than your camera can give, it tells you, and by how many stops
FLASH
• Work out the exposure for a shot with flash: guide number, the power the flash is set to (1/1, 1/2, 1/4…) and the distance
• Flash and ambient light are added together, the way they add on film
• On models with LiDAR the subject distance is measured at the centre of the frame
CINE MODE
• Frame rate and shutter angle
• Aperture in tenths of a stop, as used on set
LOGBOOK
• Save every reading with a photo and the data burned in
• Find your shots in a grid or on a map
• Share, or save to your camera roll
Metering uses the camera's real metadata together with pixel analysis, continuously calibrated against the sensor. Interface in English and Italian.
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What's New in Lume
1.2
October 28, 2026
• Camera limits: tap the camera icon and set the shutter speeds and apertures you actually have. The wheels stop there, and Lume no longer suggests values your camera doesn't have. • A new reading, closer to a TTL meter, with the value large at the centre. • New ruler-style wheels, more precise under your finger. • With a film stock selected, ISO stays locked to its speed.
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