Nikon 4804 Instruction Manual - Page 117

 Determining proper flash operation distance range in dual-light close-up flash operation with lens in use Use the table below to determine applicable apertures at the desired reproduction ratio. The proper apertures depend on ISO sensitivity, lens focal length, and desired reproduction ratio. The reproduction ratio is defined as the image-on-film size to the actual subject size. For example, if a 5 cm-long subject is photographed, and its length on film is 1 cm, then the reproduction ratio is 1:5. ISO sensitivity Lens focal length ISO AF Micro-Nikkor lenses 25 50 100 200 400 800 1600 60mm f/2.8D 105mm f/2.8D 200mm f/4D IF-ED 2.8 4 5.6 8 11 1 : 10 1 : 5 1 : 3 1 : 1 1 : 10 1 : 5 1 : 3 1 : 1 1 : 10 1 : 5 1 : 3 1 : 1 2.8 4 5.6 8 11 16 2.8 4 5.6 8 11 16 22 4 5.6 8 11 16 22 32 5.6 8 11 16 22 32 45 8 11 16 22 32 45 64 11 16 22 32 45 64 16 22 32 45 64 22 32 45 64 32 45 64 45 64 64 Effective f-number Applicable apertures Reproduction ratio 1 : 1 1 : 3 1 : 5 1 : 10 • The above data are applicable when two SB-R200 units are attached to the Attachment Ring SX-1 on both sides with flash output level ratio set to 1:1, and two flash units are fired. • More natural-looking illumination may be possible by tilting the SB-R200 toward the optical axis, depending on reproduction ratios and the lens in use. Adjust the SB-R200 to illuminate the center of the picture angle using the Target light. • When taking pictures at reproduction ratios other than those listed above, determine the appropriate figures on the table above. For example, at a 1:2 reproduction ratio, refer to applicable aperture at 1:1 or 1:3. • When the Extreme Close-Up Positioning Adapter SW-11 is used with the SB-R200, the flash light amount varies depending on reproduction ratios (increases when the shooting distance is approx. 15cm (5.9 in.) or less). Making test shots is recommended. • The data in the table above are effective f-numbers. They are not apertures on the lens.  Reference information 117