Nikon Speedlight Buku Petunjuk - Halaman 16

Jelajahi secara online atau unduh pdf Buku Petunjuk untuk Lampu kilat kamera Nikon Speedlight. Nikon Speedlight 26 halaman.

Halaman Cetak

S H O R T - R A N G E

A N D C L O S E - U P L I G H T I N G

c o n t i n u e d

Switch on the power switch on the main unit. The

neon ready lamp will light up when the unit is ready

to fire.

Depress the lens aperture opening button on the right

side of the ringlight. This opens the lens diaphragm to

full aperture and lights the focusing lamp.

To remove the ringlight, depress the spring catch

on the ringlight and turn it clockwise.

N o t e : T h e 5 1 0 - v o l t p o w e r p a c k S D - 3 c a n n o t b e u s e d a s a

p o w e r s o u r c e f o r t h e r i n g l i g h t S M - 1 . E x t e n s i o n i s n o t p o s s i b l e .

Exposure Determination

The exposure calculating diagrams on page l7 are used

to find the correct aperture for lenses from24 mm to

the l05mm. The diagrams are based on exposure in-

dexes for ASA 25 film at full power or for ASA 100

film at ll4 power. F-numbers are calculated taking

into account the lens extension.

For example, if the lens used is the Micro-Nikkor-P

Auto 55mm f/3.5 with ASA 25 film at distance of

287mmfrom the film plane at full power, the diagram

gives f/12 as the correct aperture.

For combinations other than ASA 25 full power or

100 film at Il4 output, use the f-number indicated

by the diagrams and add or subtract the exposure

factor given in table below for the conrbination in use.

Exposure Factors for Film Speeds (ASA)

( A s s u m e d a s a s t a n d a r d ( = 1 ) f o r r h e l r g h l o u l p u t F U L L a n d t h e f ' l m s p e d A S A 2 5 )

L i g h t - O u t p u t S e l e c t o r

S w i t c h

Film spad

(ASAI

Fctor

Li*rt output FULL

LiCrt oulput 1/4

1 X

4X (lncrro|. 2

l/1.3x (D.crcd

1/3 3tool

3.2X llncras l-1/3 nop3l

t/2X lDlcre.s I nopl

2X (lncrlE

I rtool

1/2.6X lD.cr.s

1-113 t

l.6X llncrr.r2l3elopl

r @

l/4x lD.crulr

2 rtoFl

t x

126

1/5.2X (D.crora 2.1/3 noptt

1/1.3X (Drcr.n

l/3.

160

ll6.4X lDr,scg2-2132

1/1.6X (Dccraa 2/3 nop)

2(n

1/8X (Oscrrr. 3 nop3l

1/2X (D.cr.Gr I noo)

4{Xt

l/t6x lD.6cE

l/4x lo.croD

2 rtoF)