Slow-Sync Flash Photography (With The F-1, T90 And A-1 Only) - Canon Speedlite 299T Manual

In n o r mal us e, the s hu t t er s p ee d au to ma ti c al l y
s wi tch e s t o eac h c am e r a 's X -s y n c s p ee d up on
fl a sh ch ar ge c om pl et io n . Wi th th e F - 1, T 9 0 an d
A - 1 , h o w e v e r , s h u t t e r s p e e d s s l o w e r t h a n t h e
X - syn c s peed c an al s o be u s e d. T h i s i s a c c om-
pl i sh e d b y s et ti ng t he s l o w -s y nc s e le c to r t o th e
" o " m a r k a s s h o w n i n t h e p i c t u r e . S l o w - s y n c
fl a sh w i l l m ak e the b ac k g r ou nd l oo k l i g ht er .
W h e n t h e s l o w - s y n c s e l e c t o r i s O F F , t h e
f l a sh i s syn ch ron i ze d w i th th e X-sy nc sp e e ds
n o m a t t e r w h e r e t h e s h u t t e r s p e e d i s s e t .
( W h e n " 8 " i s s e t , h o w e v e r , t h e f l a s h i s
s yn ch ro n iz ed
w i th " B" .)
Wh e n t he sl ow -s yn c se l e cto r i s O N a nd sh ut -
te r s pe e d s sl ow er t ha n th e X-sy nc s pe e d a re
s e t on th e ca me ra , t he f l as h i s s yn ch ro n i ze d
wi th th e s hu t te r sp e ed yo u se t.
W h e n t h e s l o w - s y n c s e l e c t o r i s O N b u t a
shutter speed faster than the X-sync speed is
s e t o n t he ca me ra, th e f l a sh w i l l a ut oma t i ca ll y
s yn ch ro n iz e w i th t he X -syn c sp ee d .
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