Terms starting with L
56 terms · page 3 of 3
Low-dispersion Glass
Optics, Lenses & Filters
count
Special optical glass, marketed as ED, UD, LD or SLD, that bends different wavelengths by more nearly equal amounts.
Low-key Lighting
Lighting & Flash
A lighting approach in which most tones sit in the lower half of the range, with a small lit area surrounded by darkness.
Low-light AF Rating
Focus & Depth of Field
EV
The dimmest light level at which a camera's autofocus is specified to work, quoted in EV at a stated aperture and ISO.
LPI
Printing, Display & Output
lpi
Lines per inch: the frequency of the halftone screen used in commercial printing.
ppi ≈ 2 × lpi
Luminance
Exposure & Metering
cd/m² (nits)
The brightness of a surface as seen from a given direction, measured in candela per square metre.
L = I / A
Luminance Noise Reduction
Post-Processing & Retouching
%
Processing that smooths brightness variation between neighbouring pixels to reduce the appearance of grain.
Luminosity Mask
Post-Processing & Retouching
A mask generated from the image's own brightness values, restricting an adjustment to a specific tonal range.
Lustre Surface
Printing, Display & Output
A semi-gloss paper finish with a fine texture, offering much of gloss's density with reduced reflection.