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Sony HVL-F20S review
Built-in diffuser for wide and telephoto shooting With the built-in
diffuser, the flash illumination covers a wider angle of view or if users
want to to shoot at a greater distance, they can rotate the dial on the
side of the flash unit to the ‘Tele’ Position. While the
‘Tele" setting reduces the width of flash coverage, it extends
the range to illuminate more distant subjects.
Extends flash range beyond camera’s included flash Though compact and
lightweight, the HVL-F20S has a maximum range twice that of the included
flash units of the NEX-3, NEX-5, and NEX-C3 cameras. This is represented as
the guide number (GN) of 20 with a 50mm focal distance.
Easy intuitive operation Unlike most external flash units, the HVL-F20S has
no dedicated ON/OFF switch. Instead, power is automatically switched on
simply by raising the flash unit into the shooting position. In addition, a
switch on the side of the unit offers Indoor and Outdoor settings, making
it easy to obtain flash illumination that suits the shooting situation. A
charging lamp indicates when the flash is ready to fire.
Bounce flash enables shadowless indirect lighting When set to ‘indoor’
shooting mode, the flash points up to bounce light off the ceiling for
shadowless illumination of your subject. When set to the ‘outdoor’
shooting mode, the flash directs light directly at your subject.
ADI Flash Metering System The ADI (Advanced Distance Integration) flash
metering system offers the optimum flash metering and automatic
white-balance compensation regardless of the background conditions or the
subject’s reflectance. ADI flash metering works in combination with ?
cameras and lenses that incorporate a distance encoder. When used with
these lenses, the camera calculates a guide number to control TTL (through
the lens) flash metering. This guide number is calculated according to
distance from the subject, ambient light and pre-flash reflectivity of the
subject and the background.
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