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User Manual - Page 12

For 2220C002.

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ENG-11
Setting the Exposure
WhentakingphotographsusingTTLmetering,
noexposurecompensationisnecessarytometer
thelightcomingthroughthelens.
WithTTLmetering,AE(autoexposure)ispossible
atallfocusingdistances.Justsetthedesired
picture-takingmode,thenchecktheshutter
speedandaperturebeforetakingthepicture.
Magnification and Effective f-number
Theaperturedisplayedbythecameraassumes
thatthefocusissettoinfinity.Theactual
aperture(effectivef-number)becomesdarker
(effectivef-numberincreases)atcloserfocusing
distances(magnificationincreases).Thisdoes
notcauseexposureproblemsfornormalpicture-
taking.However,forclose-upphotography,you
cannotignorethechangeintheeffective
f-number.
Conditionsprevalentwiththesubjectarevery
importantwhendecidingonthecorrectlevel
ofexposureforclose-up(macro)shots.Itis
thereforerecommendedthatexposurelevelsare
amendedasmuchaspossibleduringshooting,
orthattheimageofthesubjectischeckedon
thecamera’sLCDmonitor.
Usingeithertheaperture-priorityAE(Av)mode
ormanualexposure(M)modeisrecommended
forclose-up(macro)photography,asthese
makeiteasiertoadjustthedepthofeldand
exposure.
Whenyouuseahandheldexposuremetertoset
theexposure,youmusttakeintoaccountthe
exposurefactorshowninthefollowingtable.
Magnification 0.3 0.5 0.7 1.0
FocusingDistance
(m/ft.)
0.21/
0.69
0.17/
0.56
0.14/
0.46
0.13/
0.43
Effectivef/No. 3.3 3.5 3.7 4.0
ExposureFactor(stops)*
+1/3 +2/3 +2/3 +1
+1/2 +1/2 +1/2 +1
*
Uppervalues:1/3stops.Lowervalues:1/2stops.
Exposure When Taking Close-up (Macro) Shots
5
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