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< Light control range>
The following charts show the light control range of the RF-11 Ring Flash with each type of lens.
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
How to read the chart
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.
Iris(F)
Shooting
distance
F22
F16
F11
F8
F5.6
F4.0
F2.8
F2
1/4(1/16)
1/8(1/32)
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(
−−
)
1/256(
−−
)
1/4(1/16)
1/8(1/32)
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(
−−
)
1/256(
−−
)
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
−−
(1/1)
−−
(1/2)
1/1(1/4)
1/2(1/8)
Iris(F)
Shooting
distance
Iris(F)
Shooting
distance
F22
F16
F11
F8
F5.6
F4.0
F2.8
1/8(1/32)
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(
−−
)
1/256(
−−
)
1/8(1/32)
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(
−−
)
1/4(1/16)
1/8(1/32)
1/16(1/64)
1/32(1/128)
1/64(1/256)
1/128(
−−
)
8m 4m 2m 1m 0.5m 0.25m 0.22mm
8m 4m 2m 1m 0.5m 0.25m 0.22mm
The EX-25 Extension Tube
cannot be used.
F22
F16
F11
F8
F5.6
F4.0
22.2cm 17.7cm
Light intensity ratio ISO100 (ISO400)
Light intensity ratio ISO100 (ISO400)
TTL AUTO light control range, with ISO 100
TTL AUTO light control range, with ISO 400
TTL AUTO light control range, with ISO 100
TTL AUTO light control range, with ISO 400
When EX-25 Extension Tube
is used.
−−
(1/1)
−−
(1/2)
1/1(1/4)
1/2(1/8)
1/4(1/16)
−−
(1/1)
−−
(1/2)
1/1(1/4)
1/2(1/8)
1/4(1/16)
How to see the chart (when the shooting distance is 1 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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