QHYCCD QHY10 User manual
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QHY10/12 CCD CameraUserGuide
Congratulationson yournewQHYCCD seriespurchase!
Make sure youreadthisguidecarefullybeforeoperatingyour
newcamera!Timespentreadingthisguide will saveyou frustration
and maximizetheenjoymentof yournewQHY10/12CCD Camera.
Precautions
The largersurfaceareaofthe Large formatCCD chipand cooling
systemaremorefragilethanasmallormediumsized CCD.Take
extracarewhen transportingandstoringthedevice.Anysignificant
impactsmaydamage yourequipment.
ConnectionSequence:
1. ConnectUSBcablefromcameratoPC
2. Connect9-pincablefromcameratoDC201
3. Connect12VpowertoDC201.
DisconnectSequence
1.Disconnect 12Vinput powerfromDC201
2.Disconnect 9-pincable fromCamera
3.Disconnect USBcablefromPC
Power totheDC201 needstobe:
1.4A/5AregulatedDC powersupply.
2.InternaldiameterofconnectiontoDC201is2.1mm.
3.Tip-positive*
*Pleasenotethereversepolaritywillcausedamageforcamera
andaplugwithadifferentinternaldiameterwon twork.
CONTENTS
1)SAFETY PRECAUTIONS--------------------------------------------------------------------------2
2)STANDARDEQUIPMENT-----------------------------------------------------------------------3
3)SEPARATELYSOLDACCESSORIES---------------------------------------------------------5
4)CAMERASTRUCTUREANDINTERFACECONNECTION------------------------------6
5)CAMERADRIVERSINSTALLATIONANDQUICKLYMASTERING-------------------7
6)DC201IINPUTVOLTAGERANGE--------------------------------------------------------------9
7)SERVICETEMPERATUREAND HUMIDITYOFCAMERA--------------------------------9
8)HOWTOAVOIDCCD SENSOR MOISTINHIGH HUMIDITY--------------------------10
9)NOTESABOUTLONGTERMUSINGANDREMOTEOBSERVATORY-----------12
10)QHY10/12CCDCHIPREADOUTMODEANDIMAGECALIBRATION------------13
11)ABOUTCONTROLLINGFORBLOOMING----------------------------------------------15
12)PROTECTIONOFCOOLER-------------------------------------------------------------------15
13)CLEANTHESURFACEOFCCDCHIP-----------------------------------------------------16
14)SETON THEGAINand OFFSET ------------------------------------------------------------17
15)QHY10/12MECHANICALDIMENSIONS--------------------------------------------------18
16)QHY10/12REARCUT-OFF DISTANCE-----------------------------------------------------19
17)THEMETHOD OFTHECENTERANDANGLEADJUSTMENTRING-------------20
18)SOFTWAREABCCOURSE-------------------------------------------------------------------21
19)IMAGECALIBRATIONOFQHY10/12CCD-----------------------------------------------29
20)CAPTUREBIASIMAGE-------------------------------------------------------------------------30
21)CAPTUREDARKIMAGE-----------------------------------------------------------------------31
22)CAPTUREFLATIMAGE------------------------------------------------------------------------32
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STANDARD EQUIPMENT
Make sure that the following itemsare included in
your camera package. If anythingis missing,
contact the retailer fromwhich you purchasedthe
camera.
WWW.QHYCCD.COM
QHY10 or QHY12)
Camera
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Center and Tilt
Adjustment Ring
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USB Cable
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DC201 DC Power
Supply
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9pin Power Cable
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Desiccator /
SiliconGelTube
(only one)
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Optional12V4AAC
PowerSupplyAdapter
InputVoltageRange100-240V
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OptionalAirSealedBox
withElectricallyHeated
SilicaGel
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Accessories Sold Separately
(Contact your dealer for pricing andordering
information)
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机接口及说明
1：Camera Front Part
2：Air Hole for CCD chamber
3：M42/0.75 Inner Thread
Depth=3mm）
4：IR Cut OpticWindow
5 : Heat Sink Exhaust
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6: 9pinPower Socket
7: USB Socket
8: Guiding/ControlPort
9: Heat Sink Air Intake
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CameraSoftware Installation
Please download the latest QHY10/12 drivers
at the http://www.qhyccd.com(win64/32
version). This versionalso supports 64/32 bit
versions ofWindows XP,Windows Vista, and
Windows 7
Install the driver by executing the downloaded
file.
Connect Camerafollowing the connection
sequenceoutlined onPage 2.
Thecomputershouldrecognizethe camera at
this point.
The LED on the camera willflashonce the
camera has successfully connected withthe
computer.
Download driver versiondetector from
www.qhyccd.com/download.Unpackit and
run cameraversion.exe, click QHY10 or
QHY12, andensure thatthe driver version
matches what you ve downloaded.
Use the 9-pincable to connect DC201 and
QHY10/12. Please note: the 9-pin cable has
one end with EMC ring. This end should be
connected to the DC201and not theCamera.
DC201 requires a regular 12V input ,the LED of
+15,-15 +5 on the DCwould be ON
Run EZCAP software, select “scancamera”in
camera menu,It should show the QHY10/12
camera. Select the QHY10/12.
Make sure that the DC201 FAN and TED LED
are onand that the fanis blowing.
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What if dew forms onthe surface of CCD chip?
DC201 Input Voltage Range
TheDC201requires aregulated 12Vinput. The
normalinput range is11V-13V. If youexceed
13V-commonwhenyouareusing anexternal
battery, the higher voltage willreduce the life of
the TEC andFan. If youexceed 13V, please limit
the maximum power ofyourCoolingSettings. This
canbecontrolled via “TEC PROTECT ”in
the“Favorite”menuof EZCAP. Please select it. If
youare usingtheASCOMdriver, thishas been
set automatically.
Service TemperatureandHumidityof Camera
Service Temperature of QHY10/12 isfrom -20C/-
4F to +30C/86F.
Relative Humidity amount is from 0% to 90%.
Howto avoid CCD sensor moisture in high
humidity environments
Incertainenvironments, whenthetemperatureof the
camera drop below thedew-point,dewor ice may
form onthe camera.Thisissimplyalawof nature.
However, ice and/or dew whichform onthe surface of
CCD chipor opticwindow will impact yourimages.If
dew or ice formsonthe surface of CCD, thewater can
flow onto the electricboard, whichleads to short
circuitor datacorruption.It iscriticalthat youavoid
dew or ice formationduringoperationon theCCD
chip.
Theinternalspace of CCD camera isrelativelyairtight.
If dew forms onthesurface of CCD chip, thisindicates
that thereishigherrelative humidity in theCCD
chamber.Youmustdrythechamberusingthe
following method:
1. Screw offthe air socketscrew onfront part of CCD
sealed chamber
2. Put fresh silica gelinsilica geltube. Before putting
silica gel, a smallpiece of cottonisneeded to create a
barrier between thehole inthe tube andthe
chamber.*
* Desiccatormust be effective.
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Dew is formed on theIR cut glass
3. Screw silica geltube into the connection of the
sealed chamber. Make sure the rubber O-Ring
is present toensure anairtight connection.
4. Inabout 24hours, theproper relative humidity
should be restored inthe CCD sealed
chamber
If youneed to dry the chamberfaster, youcanuse
the following method:
Using compressedair or a hand pump withdry air,
make dry airgothroughthesilicongeltube.
Meanwhile, slightlyunscrew thefront cover of
CCD. The aircurrentwillflow over theCCD
sealed chamber throughthe airconnection of the
CCD. Thenairwillflow outfromthegap between
the unscrewedfrontcover ofCCD and the body of
CCD. After afewminutes, the relative humidity in
the CCD sealed chamber willget lower. Please
note, too highof a pressurecandamage theCCD
chip and the cooling system.
If thecoolingtemperature istoo low inahigh
humidity environment, theCCD opticwindow may
collect dew. Thisisbecause the temperatureof
the window is too low.
TheQHY10/12uses 3mm thick opticglass.
Althoughthisglass shouldpreventdew, follow this
procedure if youruninto problems:
1. Install M42 to M42 heater producedby QHYCCD,
Theheater willraise thetemperature toavoiddew
forming. Consult your area dealer to purchase.
2. Reducethecoolingpower. Thebest
temperature range for QHY10/12 isfrom-15 to-
20 .Please adjust coolingtemperature according
to the ambient temperature.
3. Don tputtheglass window oftheCCDupside
down.Coldairwillfocusontheopticwindows ifit
isupside down. It willcauselower temperatureof
optic windows.
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Youshouldshutoffall power afteryouare
finished usingyourCCD.If the camerais stillon
(viaUSB), anyice crystalsaroundCCD chipwill
meltwhichcancorrupt or short-circuitthePCB
board.
Notes about Long termuse camera and
Remote Observatory
If youhave to keep thecamera working for a long time
or the camerais working ina remote observatory,
please follow the following procedures, and we
recommend that youconsult your area dealer for
more details.
1. Before using the camera, always check that the
CCD chamber is sealed and dry. If there is a lot ice
crystals around the chip-this indicates a high relative
humidity inthe CCD chamber. You must dry the CCD
chamber.
2. Check the air tightness of CCD sealed chamber.
Youcancheck this by increasing the internalpressure
of the CCD sealed chamber withahand pump(do not
exceed 1.01MP).Then watchif the pressure drops. If
the pressure drops quickly, this indicates alack of air
tightness. Youneed to check if the front cover is
screwed on well.
3. Put effective desiccant in the dry tube andconnect
continually withCCD for a long term drying.
4. Don t supply power to the CCD for severaldays or
evenweeksif possible. Use a power controller to
control12V inputor AC input.
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QHY10/12 CCDChip Read-outMode and
Image Calibration.
The QHY10/12 has a 2 channel/2 frame readout
CCD chip. There are severalthings youneed to
pay attentionto during the shootingand image
process.
The red andblue pixels are read from the left
channels. Thegreen pixels are read fromthe
right side channels. The slight differences
betweenthe two channels CCD creates slightly
differentsystem gainand offsets betweenthe two
channels. This causes bias frames that are
binned 1x1 to have a background color that is too
greenor red.
Youcangenerallycorrect thisproblem by using
BIAS frames orsimplydoingacustom white
balance.
1x1 binning images usually have some pixels of
color gradient at thebeginning of eachline. The
problem canbecorrected through the BIAS field.
Some of your CCD Imagesmay have a slight red to
greengradient fromtop to bottom. This is because
the pixelreadout accumulated greater thermalnoise
unevenly. (the thermalnoise of pixelreadout later is
bigger thanthe thermalnoise of pixelwhichreadout
earlier)Color gradient is theresult of reverse
sequenceof output pixels of the left and right
channel. This problem canbe corrected through
BIAS fields.
QHY10/12 CCDchip uses a 2 phase readout mode.
The first phase is for the R and Gr pixels. The
second phase is for theGb and B pixels. Whenthe
end of the first exposure begins to readout-the
second field is stillexposing. Normally this causes
the 2 exposure times to differ slightly. Butin
QHY10/12 weuse atechnology to avoid this
happen.
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Whenexposuretime isrelative short(for high-
speed downloads, theexposure time isless than2
seconds, forthelow-speed download, exposure
time isless than9seconds) QHY10/12
automaticallyselect two-frame exposuremode,
that is, exposed twice, and thetwice exposures use
the same time. After thefirst exposurewillreadout
the first data, after the second exposure will
readoutthe second data read. Thisrealizethe
same exposuretime for all pixelsThemode of
doubleframe exposure willneed doubleexposure
time. So whenexposuretime islonger, QHY10/12
willselect automaticallysingleframe exposure
mode, that is, exposedonlyonce.Meanwhile
specialhardware inside thecamera willspendthe
same time forthe first exposure and the second
exposure
Please note: iftheshooting scene changes during
the exposure,theimage of doubleframe exposure
may not same. So QHY10/12 isnot suitablefor
rapidly changingobjects or fastmoving objects.
If youhave todolike that, youcaninstall
mechanicalshutter ofQHYCCD.Please contact
yourarea dealer or QHYCCD toconsultaboutthe
supply of mechanicalshutter
About controlling for BLOOMING
QHY10/12CCD chiphavethe-100dB ainti-
overflow foundation.Anti-overflow capacity is
slightly lower thanQHY8PRO of-110dB.So there is
possible to overflow for shooting very brighttarget
For the overflow problem of SONYCCD chip,
please install mechanicalshutter to solve. If
mechanicalshutterisindeednecessary, please
consult QHYCCD or your area dealer.
Protection ofCooler
Thedoublecooler of QHY10/12 canreachto 40-45
Centi degreesdifferenceinenvironmental
temperature.Soneedtoavoidthermalshock.
Thermalshock meansinternalstress of cooler
happento changedueto expansionor contraction
caused by therapidchangesintemperature of
cooler. Strongthermalshock willshorten use age
of cooler or even irreparable defect of cooler.
Themethod of avoidingthermalshock isthis: To
avoidreachingmaximum power ofcooler when
bootingmachine.Ensuretoincrease gradually
power of cooler. Whenstoppingmachine work ,
after reducegraduallypower of cooler shutdown
and turn off the power of machine.
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Cleaning tips
Clean the surface of CCD chip
If dustcoatsthesurface of theCCD-itwillimpact
the yourimages andpossiblecreate “dustdonuts”
and other artifacts.
If thereisonlyasmall amountof dust, we suggest
just using flat fields calibrationto remove them.
Youcanopenthefrontcoverof CCD tocleanthe
surface ofchip. Youdon'thaveto openthefront
cover of CCD( thiscanbe delete becauseCCD
front cover cannot be open)
Screw thefrontcoverof CCD counterclockwise,
and cleanthedust off of the surfaceof CCD witha
manualairpump. If there isdirt that doesn tcome
off withthe airpump, youcanuse lenspaper or a
commerciallyavailableSLR camera cleaningkit.
Here isthecorrect procedure to follow with thelens
paper:
1. Washyourhands withsoap.
2. Take a piece of lenspaper,
and fold it once or twice
(do not fold too manytimes as
the lens paper willget very
sharp and theedges may
scratchthe CCD glass surface)
3. Blow at CCD inabreathanduse lenspaper to
cleantheCCD surface.Make sure tomaintainan
appropriate pressure for CCD withyour hand.
4. Finishcleaningandreinstall thefrontcover of
CCD. If there ishigher relative humidity inyour
environment-itisnecessary to dry theinside of the
CCD sealed chamber.
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Setting the GAIN and OFFSET
Unlike manyother manufacturers, QHYCCD leaves
the the internalsettings of the camera ADC GAIN
and OFFSETsettings so thatyoucanget the
absolute best performance out of your CCD.
GAIN isthepre-ADC programmablegainamplifier
gainsetting, therange is from 0 to 63.
OFFSET is the ADC voltage offset setting.
Thecorrect settingof OFFSET andGAIN can
change theCCD camerasystemgain, which match
CCD outputsignalrange and scopeof the
quantitative ADC to get thebest dynamic range.
UsualCalibrationMethod:
1. Set theGain=0
2. Set theexposure time to 0and coverthe lens-this
is a BIAS frame .
3. Watchthelocalaverage of thecaptured images
(canuse the Noise Analyzefunctionof EZCAP)
4. The idealaverage value is around 500 to 1000. If
the value ishigher, then youshould reduce the
OFFSET. If the value is lower thenyou should
increase the OFFSET.
5. Repeat steps 2-4 to obtainthe ideal OFFSET
value.
Note A: For some QHYCCD products when you
use binmodes of 2x2,3x3,4x4, images may
reach65535 evenwithgainset to 0.
6. Openthe lenscoverandincrease theexposure
time. Use auniform lightsource, suchas light
boxes oranLCD screen,andtake asaturated
exposureof theimage.
7. Watchthelocalaveragevalueof thecaptured
images ifthevalueisis less than60,000, youneed
to increase the value ofGAIN, if thevalueis65535,
thenreduce the GAIN .
8.Repeat steps 6-7 to obtainthe appropriate GAIN
value.
9.Under theGAIN,repeat steps 2-4, andobtain
more accurateOFFSET。
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EZCAP
Get first light(sampleas QHY10)
AlthoughQHY10/12 issupportedby many3
rd
party software, we still suggest youstronglyto use
the software distributedwith theCCD----EZCAP.
Especiallywhenyouare first usingtheQHY10/12.
EZCAP will be ableto correctlyverify yourcamera
being able to work regularly or not.
Run EZCAP.exe
Choose【ScanCamera】inCamera menu
If computer system findthe hardware,EZCAP will
show 【QHY10】,click 【QHY10】.At thesame
time the 【Preview】columnwhichislocated on
the left of EZCAP willopenautomatically.
Set GAIN to 0,OFFSET 125
Setting Exposure time
Click thebutton 【Snap】,thecamerawillstart to
exposureand show image.
To stretch the【Histogram】,select the
appropriate range. The Histogram intensity
usuallycanbe observed, stretchat the different
section,make thisarea isjust thescope of
Histogram.
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Using the Center and Angle Adjustment Ring
There isaM42/0.75 thread ontheQHY10/12, which
canconnectdirectlywiththe telescope. If itneeds
adjustment, thenthecenter and angleadjustment
ring should be used.
Center adjustment----unscrew thethree screws
aroundthering. Theadjustmentringwillsets into
the dovetail slot of QHY10/12. By adjustingthe
locationof the three screws, youcanachieve about
1mm center adjustment.
Angleadjustment-----slightlyunscrew thethree
screws. There issmall screw ontheslide side of the
ring, which adjusts thesize of inclination angle. If you
rotate QHY10/12relative to theadjustmentring, you
canobtainthe correctangle.
After finishingthe adjustmentyoushouldlock upthe
three screws.
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Click theLive Preview option.Thislets you
achieve acontinuouspreview. Werecommend
select the shorter exposure time (100-500ms) for
obtainingfaster preview speeds.
Adjust thelensor thetelescopefocusand get the
a shape image.
Stop Live Preview
Select agood starpointor target inthe image
area using the left click of themouse.
OpentheFOCUS column. Click theFOCUS
buttontoget afocus image.
Adjust Histogram ofgray columnto choose the
appropriate range.
Click Live Focusoptionagain. Click thearea of
image to get amore precise target. At thispoint, it
willshowtheanalyticcurveintheScreen View
columnanda5xzoomfocus image. Whileit s
exposing,theFWHM columnwillshow thewidth
of starsandthe intensity of thestar pointpeak.
Generally, smaller FWHM andbigger peak
intensity indicate the better focus.
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WhenyoufinishFocusing, openthe Capture
columnand start shooting.
Set the appropriate valueofGain,Offset and
exposuretime
Select1x1Binningmode, select thelow read-out
speed. Click Capture to shoot.
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EZCAP cancontroltemperature manuallyor
automatically for the QHY10 camera.
Choose TemperatureControlfrom the Setup
menu.There are threetemperaturecontrol
optionsinthewindow.TEC OFF, Manualand
AutoControl.TEC OFFwillturnthe cooler of the
camera off immediately. Manualwilladjust the
power %of thecooler. It canbe adjustedby the
PWMregulationsectiononthe left. The range of
regulationisfrom 0% to 100%. Auto Controlwill
adjust thepower %of thecooler dynamicallyto
maintainaconstant sensortemperature set by the
user.
Images whichare produced byEZCAP willcover
the area of OverscanandOpticblack as shownin
the reference image ontherightof thispage.
Data from these regionscanbeusedfor CCD
image preprocessing. Butnotall software capture
produce this kinds of area.
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Steps
Please download thelatest versionof theASCOM
Platform from http://ascom-standards.org/.Install
ASCOM andALSO download any UPDATEthat is
available.
http://www.qhyccd.com/download.html download
and install the ASCOMdriver of QHY10。
RunMAXIMDL software. Select thecamera icon
inthetoolbar. TheCameraControl window should
appear.Press SetupCamerabuttoninside this
window. Select ASCOM from themenuof
CameraMode. Click thebuttonofAdvanced
button.Select types of QHY10 CCD from the
window ofASCOM Camera Choose. andthen
click thebuttonof Properties tosetsome usual
valueof parameters, like thevalueof
GAIN ,OFFSET and thespeed of read-out. Click
the buttonofOK and backto the window Camera
Control, click the buttonof CONNECT.
Select thecolumnsof Exposure fromthewindow
of Camera Control.
MAXIMDLASCOMConnection Mode
Select optionof FindStarandsettheexposure
time
Click to select the"No Calibration"from the popup
menuof OPTION.
Set themergemodewith XandY,like choose
X=4,Y=same.
Press the buttonof Startto exposure andshoot .
Whenfinishedshooting,images willbe showed.
Youcanusethetoolof ScreenStretchtoadjust
the stretching ofimage.
ColorImageTaken
TheBinningmodes of QHY10 include 2x2,4x4.
These two modes onlyoutput grayscaleimage.
So thesetwomodesareonlyusefulfor focusing
and previewing. If youwantto get acolor image,
please select the combine mode 1x1.
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Changes from the above steps number 8:
Set themergemodewith XandY,like choose
X=1,Y=same.
Press the buttonof Startto exposure andshoot .
Soonimage willbe showedinform of RAW which
are still greysaleimage. Select Convert Color from
Color menubelongto MAXIMDL,set
OFFSET,X=0,Y=0OnConvert Color menu.
Choose GenericRGB from thedropdownsboxof
Select Camera. On the window of Preview check if
the color isright. Andthenclick OK.Youcan
obtainthe color image after a while.
If thecolor isnot right,please try tochange the
valueofOFFSET,X,YonConvertColor
menu ,includethe type of cameraonSelect
Camera menu.
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Note：Inordertoimprovethefocusfunction
and thespeed of preview, thereisa
One-FrameFocusmode of QHY10 ASCOM.
WhenYou run focusorpreview, you should
select thismode andHighSpeed. But when
you get startedtoshoot, youshouldcancel
thismode and HighSpeed.
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Please download thelatest versionof theASCOM
from http://ascom-standards.org/ Ifthereisthe
latest UPDATE of ASCOM,doit together.
Install ASCOM and its UPDATE
Accordingto the instructionsaboutdriver
connectionof ASCOMfrom
http://www.qhyccd.com/download.html download
and install the ASCOMdriver of QHY10。
InstallAART3.0 andAART4.0updates. Youwill
copy AART'sCCD-linklibrary (piccdgui.dll,
download fromthe AARTwebsite )toAATR
installationdirectory. Theninstall thedriver
AstroARTof ASCOM.
RunAstroARTsoftware,select CCD Camera
from the ithePlug-inmenu bar,which wllbe
appearedthe window of CCD CameraControl
Panel.Select types of Imaging/Guide Camera for
ASCOM from the columnsof Setup.Click the
buttonof SETUP,select QHY10 CCD Camera
and set appropriate value ofGAIN andOFFSET in
menubar of Properties, then Click OK.
AstroARTASCOMConnectionMode
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If the camera of QHY10 isconnected successfully,
AART will show thewindow oftemperaturecontrol.
Please set Target as what youwantto be required
value of temperature.
There has aSettingcolumnwhichislocated the
window of CCD. Please select pixelmergemode.
Set the exposure time under thewindow of CCD.
Click the buttonof START and shoot a image.
If youwanttoget acolor image inthestate of
mode 1*1,youneedto use thecolor
transformative functionof CCD Color Synthesis
belongto the menu barofCOLOR.Select RGE
image andthe advisablevalueof X,Yand
OFFSET ,so click OK.
Note：Inordertoimprovethefunction of
focusandthespeed ofpreview, therehasa
One-FrameFocusmode of QHY10 ASCOM.
WhenYou run focusorpreview, you should
select thismode andHighSpeed. But when
you get startedtoshoot, youshouldcancel
thismode and HighSpeed.
Image Calibration ofQHY10 CCD
Image calibrationmeans to calibrate theCCD with
aBIAS field, aDARK fieldandaFLAT field. You
cancompletelyremove thermalnoise of theCCD
throughproper calibration.Additionally,youcan
obtainbetterimage highlights. Youcanremove
dark spots whichare causedbydustonthe
surface oftheCCD. Image calibrationisacritical
step for seriousastronomicalphotography.
In orderto obtainaccurate calibrationinformation,
youneed to use theQHY10 temperature
controller. CCD shouldbe set inregulated
temperature state. Andtemperatureshould
remainthe same when shooting .
Thetemperature controlof EZCAP islocated in
Temp Controlof themenubar ofSetup. Youcan
stretchthe temperature controlsectiononthe right
of thewindowofTemperatureControlto set the
temperature whatyouwant.Andthenselect Auto
Control,that means CCDhasbeen the
homoeothermic control.
It will take some time to achieve the target
temperature for CCD. Youhave to waitamoment
until thetemperature of CCD has beenstable,you
canstart to shoot andcalibrate image.
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Note: Inmost cases, there maybe appear some
Verticalstripes inthe image whichis formed
by lots of BIAS or DARK image stacked.
This is normal. Therewillnot appear such
Verticalstripes after this image is calibrated.
The Calibration Principle of CCD Image
Calibrated image=[(L-B)-(D-B)]/(F-B)=(L-D)/(F-B)
There, Listheactualshootingimage, Drepresents
the Dark Frame images, Brepresents BIAS image
and F means the FLAT image.
Capture BIASImage
BIAS image meansexposure time of images isZero.
Youneedavoidinganylighttoenter into CCD
Sensor whenyoushoot image. So youhaveto
cover thelens cap of camera.
Set ExposureTime to0, and thenusethelow
speed to shoot many (10-50sheets) BIAS image.
Save andoverlap them .Use the functionof average
overlapping, donot matchwithpositiontoget one
BIAS Master image. Save this image.
PartialCropped BIAS Image B）
Capture DARK Image
DARK Imagemeanstheimage which of the
exposure time isthesame as the time ittook
officially.Youhave to avoidanylightenter into
CCD sensor. Thereforeyouhave to cover thelens
lid.
Theexposuretime shouldbe set thesame with
shooting time .and thenuse the low speed
and mode1*1to shootabout (10 -50sheets)
BIAS image. Saveand overlay theseimages to
form a Dark Master image. Save theimage.
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