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Nikon SB-80DX Manual

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De werking in detail
ISO 25 50 100 200 400 800 1600
Factoren x0,5 x0,71 x1 x1,4 x2 x2,8 x4
Het juiste diafragma berekenen
n
Om het juiste diafragma te berekenen, baseert u zich op onderstaande vergelijking en de
tabel met richtgetallen, uitgaande van de ingestelde ISO-gevoeligheid en de flitssterkte:
f/stop (diafragma) = richtgetal (GN) x ISO-factoren
÷
opnameafstand (m/ft)
n Stel hetzelfde diafragma in op de SB-80DX en op de camera of het objectief.
Het richtgetal berekenen
n Bereken het richtgetal volgens onderstaande vergelijking, uitgaande van het
vereiste diafragma en de opnameafstand.
Richtgetal (GN) = opnameafstand (m/ft) x diafragma x ISO-
factoren
n Bepaal, uitgaande van de tabel met richtgetallen, een geschikte flitssterkte
die overeenstemt met het hiervoor verkregen richtgetal en stel deze waarde in
op de SB-80DX.
ISO-gevoeligheidsfactoren
n Voor films met een andere gevoeligheid dan 100 ISO moet u de richtgetallen
voor een ISO-gevoeligheid 100 vermenigvuldigen met de factoren
weergegeven in de tabel met richtgetallen.
∗1 Met gemonteerde Nikon Diffusion Dome en de ingebouwde groothoekadapter op zijn plaats.
∗2 Met gemonteerde Nikon Diffusion Dome.
∗3 Met de ingebouwde groothoekadapter op zijn plaats.
Positie zoomkop (mm)
∗1 ∗2 14
∗
3
17
∗
3
24 28 35 50 70 85 105
M1/1 12,5/41 16/52 17/56 19/62 32/105 34/112 38/125 44/144 50/164 53/174 56/184
M1/2 8,8/29 11,3/37 12/39 13,4/44 22,6/74 24/79 26,8/88 31/102 35/115 37,5/123 40/131
M1/4 6,3/21 8,0/26 8,5/28 9,5/31 16/52 17/56 19/62 22/72 25/82 26,5/87 28/92
M1/8 4,4/14 5,6/18 6,0/20 6,7/22 11,3/37 12/39 13,4/44 15,5/51 17,7/58 18,7/61 19,8/65
M1/16 3,1/10 4,0/13 4,3/14 4,8/16 8,0/26 8,5/28 9,5/31 11/36 12,5/41 13,3/44 14/46
M1/32 2,2/7 2,8/9 3,0/10 3,4/11 5,6/18 6,0/20 6,7/22 7,8/26 8,8/29 9,4/31 9,9/32
M1/64 1,6/5 2,0/7 2,1/7 2,4/8 4,0/13 4,3/14 4,8/16 5,5/18 6,3/21 6,6/22 7,0/23
M1/128 1,1/4 1,4/5 1,5/5 1,7/6 2,8/9 3,0/10 3,4/11 3,9/13 4,4/14 4,7/15 4,9/16
FP
-- - -
10,7 /35 11,3/37 12,7/42 14,7/48 16,7/55 17,7/58 18,7/61
Richtgetal (100 ISO, m/ft)
Flits-
sterkte
… 45 …


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