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< Light control range>
The following figures show the light control range of the TF-22 Twin Flash with each type of lens.
The figures assume that both flashes are used at the recommended angle (page 32).
1.TTL AUTO
Flash at optimum exposure is available by setting the lens iris (F) in the range for each
shooting distance shown in the following charts.
Range with ISO 100 Range with ISO 400
2.MANUAL
• Flash at optimum exposure can be obtained by setting the light intensity ratio and lens iris
(F) combination for each shooting distance.
Note
• Since the optimum exposure is variable depending on subject, lighting, distance, etc., it is recommended that you
determine the optimum settings by taking some test shots based on the following charts.
ZUIKO DIGITAL ED50mm f2 Macro
ZUIKO DIGITAL 14-54mm f2.8-3.5, At 14 mm
ZUIKO DIGITAL 14-54mm f2.8-3.5, At 54 mm
Iris(F)
Shooting
distance
F22
F16
F11
F8
F5.6
F4.0
F2.8
F2
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(1/512)
1/256(
−−
)
1/512(
−−−
)
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(1/512)
1/256(
−−
)
1/512(
−−−
)
16m 8m 4m 2m 1m 0.5m 0.24m 23.1cm 21.3cm
Light intensity ratio ISO100 (ISO400)
When EX-25 Extension Tube
is used.
TTL AUTO light control range, with ISO 100
TTL AUTO light control range, with ISO 400
Light control range using one flash unit at 1/512 flash emission ratio with ISO 100
☆:When one flash unit is used (ISO100,1/512)
−−
(1/1)
−−
(1/2)
1/1(1/4)
1/2(1/8)
1/4(1/16)
1/8(1/32)
Iris(F)
Shooting
distance
F22
F16
F11
F8
F5.6
F4.0
F2.8
1/32(1/128)
1/64(1/256)
1/128(1/512)
1/256(
−−
)
1/512(
−−
)
1/32(1/128)
1/64(1/256)
1/128(1/512)
1/256(
−−
)
1/512(
−−
)
16m 8m 4m 2m 1m 0.5m 0.25m 0.22mm
16m 8m 4m 2m 1m 0.5m 0.25m 0.22mm
Light intensity ratio ISO100 (ISO400)
Light intensity ratio ISO100 (ISO400)
Iris(F)
Shooting
distance
F22
F16
F11
F8
F5.6
F4.0
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(1/512)
1/256(
−−
)
1/512(
−−
)
22.2cm 17.7cm
☆:When one flash unit is used (ISO100,1/512)
☆:When one flash unit is used (ISO100,1/512)
When EX-25 Extension Tube
is used.
The EX-25 Extension Tube
cannot be used.
TTL AUTO light control range, with ISO 100
TTL AUTO light control range, with ISO 400
Light control range using one flash unit at 1/512 flash emission ratio with ISO 100
TTL AUTO light control range, with ISO 100
TTL AUTO light control range, with ISO 400
Light control range using one flash unit at 1/512 flash emission ratio with ISO 100
−−
(1/1)
−−
(1/2)
1/1(1/4)
1/2(1/8)
1/4(1/16)
1/8(1/32)
1/16(1/64)
−−
(1/1)
−−
(1/2)
1/1(1/4)
1/2(1/8)
1/4(1/16)
1/8(1/32)
1/16(1/64)
How to see the chart (when the shooting distance is 2 m)
TTL AUTO With ISO 100, iris F2 to F11 (←→) is the range where optimum exposure is achieved.
MANUAL With ISO 100, optimum exposure is achieved at iris F11 (●) when the light intensity
ratio is 1/1.
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