Sony HVL-MT24AM Camera Flash User Manual


 
HVL-MT24AM_GB 2-889-493-01 (1)
26
Selecting Apertures in TTL Flash
e following tables show values when ISO 100 is used without the wide panel
or diuser. For other ISO speeds, or if you use the wide panel or diuser, adjust
the aperture settings according to the tables on page 28.
e aperture ranges given in the tables are calculated values. e actual lens will
have its own usable aperture range.
Example: Using a 50mm F2.8 Macro lens when ISO 100, with a pair of
twin flash units with no arm, at a magnification ratio of 1:1
e range of acceptable apertures is calculated to be from f/4 to
f/90 (refer to the following table).
However, the lens aperture range is f/2.8 to f/32, so the actual
range possible with this lens is f/4 to f/32.
e following tables show data for certain lenses and magnication ratios. For
other lenses and magnication ratios, see page 54.