NOTESONCLOSE-UP
Camerashake
Whenshootingclose-ups,youwillprobablyen-
countersomespecialproblemsnotfoundingeneral
photography.Oneissensitivitytovibration-image
magnificationissohighthateventheslightestmove-
mentduringshootingwillcausea blurredimage.To
avoidthis,werecommendtheuseofa tripodwitha
cablereleasetoactivatetheshutter.Forthispurpose,
the360°rotatabletripodmountingcollaronthePN
ringwillproveuseful.
Closeworkingdistances
Atthehighreproductionratiosofclose-upshooting,
depthoffielddecreasesdrastically.Stoppingdown
thelenspartiallycompensatesforthis,butatvery
closeworkingdistances,anextremelyshallowdepth
offieldisinevitable.Besure,then,toplacethe
cameracarefullytoensurethattheimportantsur-
facesofthesubjectareinthesamezoneofsharp-
ness.
Close-upphotographywithPN-11ring
TheMicro-Nikkor105mmf/2.8goesfroma 1:2
reproductionratiodownto
1:0.88
whenthePN-11
ringisattached.BecausetheClose-RangeCorrection
Systemisspecificallydesignedforfocusingatclose
distancesratherthanatmediumtoinfinity,the
aperturesthatwillgiveyougoodresultswillbe
10
ANDDUPLICATIONWORK
limitedwhenthePN-11ringisusedforreproduction
ratiosfrom1:2to1:1.1.Therecommendedf/number
scaleengravedabovethereproductionratioscale
indicatesbestresults.
Close-upphotographywithbellows
attachment
Whenusinga bellowsattachment,focusbyturning
thelensfocusingringtoa closerdistancesetting,
withoutlengtheningthebellowsextension.Ifbel-
lowsextensionisrequiredforreproductionratios
from1:2.2to1:1,stopthelensdown,referring
totherecommendedf/numberonthelensbarrel.
•Thelensshouldbefocusedtoasclosea distanceas
possibleforgoodresults,evenifthelensisusedin
reverseposition.
•Fora predeterminedreproductionratio,theexten-
sionvalueofthebellowsattachmentiscalculated
bythefollowingequations:
bellowsextension
reproductionratio= — — ;
focallength
A1:2reproductionratioisachievedwiththelens
setatitsclosestdistancesetting(withapprox.
82mmfocallength).Ifyouwanttoshoota subject
at2Xmagnification(1:0.5reproductionratio),use
thefollowingequationfortherequiredbellows
extension: