Selecting Apertures - Ttl Flash - Minolta MACRO TWIN FLASH 2400 Instruction Manual

BASIC FLASH MODES

Selecting Apertures - TTL Flash -

• The tables beginning at the bottom of this page shows values when
ISO 100 film is used without the wide-angle adapter or diffuser. For
other ISO film speeds, or if you use the wide-angle adapter or diffuser,
adjust the aperture settings according to the tables on page 32.
• The aperture ranges given in the tables are calculated values; the
actual lens will have its own usable aperture range.
Example: Using an AF 50mm f/2.8 Macro lens with a pair of twin flash
units with no arm, at a magnification ratio of 1:1. The range of accept-
able apertures is calculated to be from f/4 to f/90 (bold type in the
table). However, the actual range possible with this lens is f/4 to f/32.
• The following tables show data for certain lenses and magnification
ratios. For other lenses and magnification ratios, see pages 60 and
62.
AF 50mm f/2.8 Macro (Lens aperture range: f/2.8 - f/32)
AF 50mm f/3.5 Macro (Lens aperture range: f/3.5 - f/32)
Magnification
1:1 1:1.5
ratio
4 ~ 90 5.6 ~ 128
Without arm
2.8 ~ 64 4 ~ 90
Arm (short) 2.4 ~ 54 2.8 ~ 64
60 ° position 1.7 ~ 38 2 ~ 45
Arm (long) 1.4 ~ 32 1.4 ~ 32
90 ° position 1 ~ 22 1 ~ 22
Ring Flash 2.8 ~ 64 3.5 ~ 76 3.5 ~ 76 2.4 ~ 54
Upper set of numbers is for two twin flash units.
Lower set is for one twin flash unit.
Ring flash is common for 1 ~ 4 tubes.
30
1:2 1:3 1:4
8 ~ 180 5.6 ~ 128 4.5 ~ 108
5.6 ~ 128 4 ~ 90 3.5 ~ 76
4 ~ 90 4 ~ 90 4.5 ~ 180
2.8 ~ 64 2.8 ~ 64 3.5 ~ 76
2 ~ 45 2.4 ~ 54 2.8 ~ 64
1.4 ~ 32 1.7 ~ 38 2 ~ 45
2 ~ 45
AF 100mm f/2.8 Macro (Lens aperture range: f/2.8 - f/32)
Magnification
1:1 1:1.5
ratio
3.5 ~ 76 3.5 ~ 76
Without arm
2.4 ~ 54 2.4 ~ 54
Arm (short) 2 ~ 45 2.8 ~ 64
60 ° position 1.4 ~ 32 2 ~ 45
Arm (long) 1.2 ~ 27 1.7 ~ 38
90 ° position 0.85 ~ 19 1.2 ~ 27
Ring Flash 1.4 ~ 32 1.4 ~ 32
AF 200mm f/4 Macro Apo G (Lens aperture range: f/4 - f/32)
Magnification
1:1 1:1.5
ratio
2.8 ~ 64 2 ~ 45
Without arm
2 ~ 45 1.4 ~ 32
Arm (short) 2.8 ~ 64 2.8 ~ 64
60 ° position 2 ~ 45 2 ~ 45
Arm (long) 2 ~ 45 2 ~ 45
90 ° position 1.4 ~ 32 1.4 ~ 32
Ring Flash 1.7 ~ 38 1.2 ~ 27
AF Macro Zoom 3X-1X f/1.7-2.8 (Lens aperture range: 1X: f/5.6 -
54, 3X: f/6.7 - 64)
Magnification
1X
ratio
Ring Flash 4.5 ~ 108 4 ~ 90
Upper set of numbers is for two twin flash units.
Lower set is for one twin flash unit.
Ring flash is common for 1 ~ 4 tubes.
1:2 1:3
2.8 ~ 64 2.4 ~ 54
2 ~45 1.7 ~38
2.8 ~ 64 2.8 ~ 64
2 ~ 45 2 ~ 45
2 ~45 2 ~45
1.4 ~ 32 1.4 ~ 32
1.2 ~ 27 1 ~ 22
1:2
1.7 ~ 38
1.2 ~ 27
2 ~ 45
1.4 ~ 32
1.7 ~ 38
1.2 ~ 27
1 ~ 22
3X
31