Nikon SB-21 J571~QilIE~~~0*6f1J, For Micro·Nikkor 55mm fI2,B and 55mm fl3.5 Normal position

/j'571;:~QilIE~~~0)*6f)1J____________

DETERMINING APERTURE ACCORDING TO THE SHOOTING DISTANCE

"7 =.:1. ?11.-~7'CIl;fO)ilMlE~~HiiO)JHIJ 1;1:. ntIJat:l~S'1-\",II.-~

~ffl~~~~O)~~ • • rnO)~~~~t~ij8to)~.~

Bh~~~~7~~*~~~t~~~*~ . ~hfhO)~

~70)*IHi!I(;l:lll~~§:~(lIt~i*tJ· ~ 70f Il.-1..jjjj * c,O)~§:q). tIUi!l l;l:~ ~) iii('IlAA F iii C' (;I: to: < ~&:~) I) ;.. :7'c'alt)E~ '" ~ ~ ~)iii)~Bh~""(\"*~.

~l~ 7tJ' ~~~) iii HitJ;.1!i! .., cjil~9 .Q~(;I:. :J?O),9.I:~' ;U~: (t: ~ L'

(j):7'~ 7 l;t~c 7 of 1("1..~Jt1S0 1000) t ~ 0) to) c ' "t .

ISO I00l:..l9}0)!tl\/f0)7111.-1..H~ffl ~ ~ t/!.g.I;I:. ~/f 1:J;i5

~cmJ;.I!i!..,~.~8~MlE~~~.~~ij~~ .

,1JI')HlI~ fSl')~~(

+ -------->

!X'iIi!! 4 ~ 3ll 3 1% III 1 1% III I % II 0 ~ % I I~ 1% 1 ISO 1600 1150 1Il00 800 640 500 400 31Q 150 1QO 160 115 100 80 64 50 40 31 15

<V~7'C~§:~tJ'40mmJ;..lp>O)t~. ;!!i7'C?:$"7:$'-SW-8~iif

ffl ~t:t/!.g.I;I::7' ~7tJ'~ij'CJ;.Jl)ht:.~)iifitJ'~. i!< ~I:

f-l I/2t5t. ~) il;A. C'( t: i!< L' .

Q)$'}$1Il:»'LA-2. * t:(;l:LD-2~i~ffl ~ . 7 =.:1. ? 11.-7II.-~ 7'C~rr1 t/!.g. (;I:. :7'~ 7tJ' ~ !j'CJ;.I!i! .., t:~ ~) 8tJ· ~ ,i!< ~

(:f-l 1 /2t5t.~)il;A.c' < t:i!<L' .

®:7' ~ 71;1:. 71:7 t:l ="/ ::J - 11.-0)to)~i!*L'c. B~ci!<

h cL '~ I; ;";(O)"¥i';Jiiic' Bhi!< h cL' ~ ~ . iiE.., c.

1;;" ;(1: J: .., c (;I: :l?y~~tJ'jo L; ~ ~ t t ~ ~J1 ~O)c'.

•J;.I!i! .., ~~ij8~~ ± I ~a/f~ij.~~~cWB~ c;f)(~t~;f)~~~~*~ .

@I;;" ;(lEloJ ~ 1l;f0) :7'~ 7 (;I: ~ii'i( I ii'i)J;XfO);f@'J'lil:BIl;f

O)to).I;;";(~IoJ~1l;f0)~~7~~.~~0)~*ffi~1l;f O)to)c'~ . jibc . 1;;";(lEloJ~c'jJ1;*lIlB~rr .., t:

ij~~• .g.~~. ~~7~~~ij8~.J;.I!i!~ ~t~ ~

~~ttA. .

7'770)!j'f.;s../.i

19~~(i71:7 t:l55mm F2. 81; ;" ;(~~1oJ ~ c'{~ffl. liUH§:~

tJ' O.4mO)t/!.g.(:;).:.-.:. -':;ft:~0)~~72~~~!O

IS0 1000)7 1 11.-1..c ' (;I: M 1/ 16 = f-l1/ 2. 8, M 1/ 4= f-l1/ 5 .6. MFULL =f-l I/ 11

IS0500)7 of 11.-1..c ' (;I: M 1/ 16 = i~ffl1'iiJ , M1/ 4 = f-l1/ 4,

MFULL = f-l1/ 8

150400 0)7 1 11.-1.. c'(;I: M 1/ 16 = f-J 1/5 . 6. M 1/ 4= f-J 1/ II .

MFULL = f-J I/ 22

tto:~) *~ .

The following graphs show the relationship between the subject-to-film-plane distance and aperture set on the lens at ISO 100.

Determine the proper aperture from the graph and set on the lens. For film speeds other than ISO 100, com- pensate the aperture. With one step lower film speed, use one stop wider aperture (smaller f-number), and vice versa.

Note that the graphs for lenses in normal position only show apertures at reproduction ratios lower than 1:1. Apertures are not given for higher reproduction ratios with lenses in normal position.

When using the Micro-Nikkor 55mm f/ 2.8 lens, for example, see graph 1,

With ISO 100 film , to shoot a subject Q,5m away from the film plane at 1/16 output, set the lens aperture to f/8 . If your film is ISO 25, set the lens aperture to f/4 .

With a subject closer than 40mm away from the flash modules, attach the Condenser Adapter SW-8 and reset the lens aperture to an aperture approx. 1/2 stop smaller.

When the S8-21 is powered by external power source LA-2 or LD-2, use an aperture approx. 1/2 stop smaller than that determined using the graph.

"717055mmf 2. 8·55mm fl 3. 5lEloJ~~fflll;f

For Micro·Nikkor 55mm fI2,B and 55mm fl3.5

in normal position

:7'~7 1	m		(ISO 100)
Graph 1	0 . 7	~"l	kFJII
	0 .6		\ 1\

\ \ \

\

	1\	1\
t	\	\
	PK- 13fil!lIlll1i [
		/
	with PK - 13 . /
	0 .2

0 .1

f / 1.4 2 2.8 4 5.6 8 11 16 22 32

_ II"L.o/;(~')fil

48

Aperture