StackShotManual_1_5.pdf - 第37页

 37    6. Setup  examples  6.1 Mirror  Lock  up   Mirror  lock ‐ up  is  a  commonly  used  feature  in  ma cro  photography  to  reduce  vibration  of  the  camera  during  shooting.  SLR  …

5. Connections&Cables

OneofthedesigngoalsofStackShotwastomakeitsimpletoaddcableextensionsanddo

customwiring.Nothingismorefrustratingthanbuyingaproductandfindingoutthatituses

over‐pricedproprietarycables.AllStackShotcableextensionsareavailableatyourfavorite

audio/videoequipmentsupplystore.Weprovidetheconnectiondiagramsbelowsothatyou

havetheoptionofmakingcustomcables.Ifyouhaveanyquestions,pleasecontactusat

support@cognisys‐inc.com

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5.1 ShutterTriggerOutput

Thetriggeroutputusesastandard“RCA”jack.RCAexte nsionscomeinalldifferenttypes,one

endasmaleandtheotherasfemale.Toextendtheshuttertriggercable length,simplybuya

mono(single)extensionwhichistypicallyusedforvideo.

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AswithallRCAjackstheoutsideconnectorisground.TheStackShottriggeroutputisa“Low

SideDriver”(switchesinground).Thismeansthatwhentheshuttertriggeroutputfires,it

connectsthecenterconductoroftheRCAjacktotheoutsideconnector(ground)todraw

currentthroughthecenterconductor.

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SeeFigure13belowforawiringdiagramfortheRCAconnectors.

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Figure13‐RCAconnector

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5.2 MotorCable

Themotorcableincludedwiththekitisahigh‐qualityS‐video/SVHScablewithlowimpedance.

IfyouaregoingtoextendthelengthbetweentheStackShotcontrollerandtherailmakesureto

useahigh‐qualitycable–otherwiseperformancemaybesacrificed.

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6. Setupexamples

6.1 MirrorLockup

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Mirrorlock‐upisacommonlyusedfeatureinmacrophotographytoreducevibrationofthe

cameraduringshooting.SLRcamerasswingthemirrorupoutofthelight‐pathtothefilmor

sensorjustpriortotheshutteropening.Thismovementultimatelyleadstovibrationwhichcan

inducemotionblurinthepicture.Somecamerashavetheabilitytoenableafeaturewherethe

firstbuttonpressoftheshutterswingsthemirrorupandthesecondbuttonpressopensthe

shutter.ThisfeaturecanbeprogrammedintoStackShotbygoingintotheconfigurationmenu.

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ThismethodisidenticaltosettingStackShottotakemultiplepictures.PresstheCONFIGbutton

toentertheglobalconfiguration:

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== Global Config ==

> # pics: 1

Tsettle: 500.0 ms

Toff: 500.0 ms ->

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Withthecursornextto“#pics”(discussedinsection3.3.1),presstheUPbuttontochangethe

settingto“2”.Thiswillcausetheshutteroutputtofiretwotimespercamerastep.Thefirst

timewillswingthemirrorupandthesecondwillexposetheimage.We’renotquiteyetdone

though.PresstheSELECTbuttonuntilthecursorisnextto“Toff”.

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== Global Config ==

# pics: 1

Tsettle: 500.0 ms

> Toff: 500.0 ms ->

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“Toff”isthetimetheshutteroutputwillremainoffbetweenoutputpulses(seesection3.3.3for

moredetails).Inthiscase,thiswillbethetimebetweenwhenthemirrorisraisedandthe

pictureisactuallytaken.AdjustthisparameterusingtheUP/DOWNbuttonstoasuitablevalue

toletthemirrorvibrationsettleoutprior toexposingtheimage.PresstheCONFIGbuttononce

moreanditwillreturnyoutothemainmenu.

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6.2 100mmvs.TheOrchid

InthissetupexamplewehaveaCanon7D,EF100mmmacrolens,andofcourseStackShot.

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Figure14‐StackShotOrchidSetup

TheStackShotcontrollercoordinatesthecameraposition,settlingtime,exposure(and

potentiallyexposurebracketing),andautomati creturnuponcompletion.Theoptionalauto‐

returnfeatureallowsadjustmentofthecamera’sparametersandlightingwitho uthavingtore‐

positionthecamera.

FortheOrchiditwasdecidedthat“AutoStep”mode beused(seesection3.7formoredetails).

“#Steps”wasadjustedto10steps(11pictures)which wouldresultinanoutstan dingfinal

stackedimage.

Mode: Auto-Step

> # Steps: 10

Select Start Pos

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TheFWDbuttonwaspresseduntilthecamerareachedthedesiredstartingpointofthestack.

Picktheclosestobjectyouwantinfocusforthestackandmovethecamerasuchthatthisisin

sharpfocus.TheSELECTbuttonwasthenpressedtoacknowle dgethestartingposition.Then

theBACKbuttonwaspressedtomovethecameratotheendpointofthestack.Movethe

cameratothepointwherethefurthestawayelementinyourcompositionisinfocus.Againthe

SELECTbuttonwaspressedtoconfirmthefinalposition.Thedisplaythenshowedthe

following:

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