TERMINOLOGY TRANSLATOR
Bust through the technical jargon with this cross-manufacturer guide
Right above
VIGNETTING MANAGEMENT
At shorter focal lengths it is important to control the darkening of the frame edges. Avoid stacking circular filters that will protrude from the lens to prevent ‘hard vignetting’
Right
TRUE WIDE ANGLE
To achieve the same wide perspective as offered by full-frame cameras, models with a smaller sensor must be paired with ‘digital only’ optics of 12mm or wider
Look out for ASPH, which indicates the use of aspherical elements for reduced distortion