Nikon D850 User manual

CENTRALDS ASTRO D850 USER GUIDE
Astro D850
User Guide
Version1.01!
April2018
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CENTRALDS ASTRO D850 USER GUIDE
Contents
*ThankyouforpurchasingaCentralDSproduct.
Introduction 3
Informations of product 3
Camera usages 4
Package contents 4
Camera operation and responsibility 5
Handling precaution 5
Nomenclature 6
Taking Pictures 6
Characteristics of the modification 8
Safety of the User and the Camera 9
Product Warranty 9
Astro D850 system Chart 10
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CENTRALDS ASTRO D850 USER GUIDE
Introduction
Astro D850 is a cooled camera that modified D850 of Nikon.We took out the image sensor from the
inside of camera body and attached a TEC cooling module on to it and made it to a high
performance Astronomical cooled camera.The image sensor can be cooled maximum -18℃( ±
2℃) below ambient by the installed TEC cooling module.
Informations of product
＊Cool down the temperature of CMOS sensor 18 Celsius degree(±2℃) from that of ambient air.
＊Absolutely high-Quality image in B-shutter use compared with usual unmodified DSLR
＊Realtime Monitoring of the cooling temperature by digital thermometer
＊Drop-in filter system
＊Use of high efficiency Thermo electric cooler module
＊Power: 12V, 1.7A DC"
＊Low Pass Filter Removed.
＊Optimal design by 3D CAD modelling
＊Precision manufacturing by CNC machine
＊Perfect tuning of optical axis of CMOS sensor by 3 point alignment
＊Permanent Anti-dew system applied.
＊Hoya MC Clear Filter#Installed
* Internal Silent cooling fan installed
* Live-view Focus function alive.
＊Removed function:Low Pass Filter, Mechanical shutter, Sensor Cleaning
＊Net weight: 1,580g
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CENTRALDS ASTRO D850 USER GUIDE
Camerausages
Youwillgetusedtothiscameraandunderstandthecamerabetterwhilereadingthismanualandtaking
testimages.Pleaseread‘Handlingcaution’and‘Safetyoftheuserandthecamera‘thoroughlytoprevent
anyaccidentsordamagestothecamera.
Packagecontents
Pleasecheckfollowingdevicesandaccessoriesareallincludedinthepackage.!
Ifanythingismissing,pleasecontactCentralDSorthedealerthatyoupurchasedfrom.
1. AstroD850body
2. FRM72/BaseAdapter(M72x0.75mmpitchMaleThread)
3. CM2C/Drop-InFiltersystem+CanonEFMount(CM2N/Drop-InFiltersystem+NikonFMount)
4. DFH48/48mm(2”)FilterHolder
5. DFH52/52mmFilterHolder
6. FR1/FieldRotator(M72x0.75mmpitchMaleThread)
7. ECR48/AdapterforWideTthread(M42x0.75mmPitchFemaleThread)
8. ECR54/AdapterforTakahashiTelescope(M54x0.75mmPitchMaleThread)
9. DTH-1/DigitalThermometer
10. CT18/ThermometerCable
11. PS1204/DCpowersupplyforTECcooler
12. PSEC1/DCextensionpowercable(5.5mm/2.1mmBarrel)
13. PSC1/CigarJack12VPowerCable
14. PSCA1/AC100-240VToDC12V5AAdapterPowerSupply
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CENTRALDS ASTRO D850 USER GUIDE
Cameraoperationandresponsibility
You can record the images to the storage(Memory Card) of this camera. CentralDS will not be
responsible for any inconvenience or loss due to failure of storing images to the Memory Card or
defectiveimagesstoredinthecard.
Youcanusethiscameraforpersonaluseanywhereintheworld.
Handlingprecaution
•Thiscameraisahighprecisiondevice.Pleasedonotdrop
andavoidanyphysicalimpactagainstcamera.
•Thiscameraisnotwaterproof.Ifyoudropthecamerain
water,wipeoffanywaterdropletsfromthecamerawitha
dryclothandcontactCentralDS([email protected])
•Do not leave the camera under the direct sunlight. High
temperaturecandamagethecamera.
•Donotdisassemblethecamera.
•Do not touch Parallelism Alignment Screws (3 pieces of
M4headlessscrews)onthebeneathofFRM72.
•If the Parallelism Alignment Screws were adjusted by
personnel not authorized by CentralDS, the warranty will
bevoided.
•Pleaseuseadustblowertoremovedustsonthefilter.
•Donotdisassemblethefilter.Iftheairtightsealingisdamaged,dewcanforminsidethecamera.
•IfthecameraisdisassembledbypersonnelnotauthorizedbyCentralDS,thewarrantywillbevoided.
•Donotleavethecameraattachedtoatelescopewiththecoolingsystemoffforlongtime.Dewcan
formonthesurfaceofthecameraandthiscandamagethecamera.
•Ifcondensationformsonthecamera,donotusethecamera.
•Ifthecameraissuddenlybroughtinfromthecoldintoawarmroom,condensationmayformonthe
cameraandinternalparts.Topreventcondensation,firstputthecamerainasealedplasticbagand
letitadjusttothewarmertemperaturebeforetakingitoutofthebag.
•Store the camera in a sealed container with desiccants (i.e. Silica gel) or cool, dry, well ventilated
location.
•Imagesensordust–CentralDStestseachcamerawithtestexposurestochecktheimagesensoris
dust free before shipping. However about 2 – 4 % of the customer reported dusts on the image
sensor. If you see marks on your image due to the dusts on the image sensor, please contact
CentralDSforservicing.Donotdisassemblethecameratocleanthedusts.
•Cautionwiththecoolingsystemactivated–theTECcoolingsystemfortheimagesensorisdesigned
to emit substantial amounts of heat to outside. This does not cause any problem on the camera
operationbutaminorburncanbecausedifskiniscontactedwiththecoolingsystemforextended
periodtime.
•Don’t set cooling temperature under -45C.IfyoucooldowntheCMOStemperatureto-45Cunder,
MicrolensesofImagesensor(=CMOS)willbedestroyed.
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CENTRALDS ASTRO D850 USER GUIDE
Nomenclature
Taking Pictures
•Youcanoperatethecamerawiththefollowinginstruction.
1. AttachfirmlythecameratoTelescopeusingFR1+ECR48orECR54.
2. InsertaFilterinDrop-InFilterHolder.(**veryimportanttomaintainBackFocusDistance)
3. ConnectTECpowercables(PS1204)andtemperaturesensorcable(CT18).
4. ConectDC12VtoPS1204.
5. PowerOncanonBody.
6. Checktheworkingofcanonbodyandcoolingmodule.
7. Check the cooling temperature. Within 7~10minutes the temperature of CMOS will drop to
maximumcooledtemperature.
8. Using[Liveview]modeofcamerafindthesubjectandadjustthefocus.
9. Taketheshots.
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CENTRALDS ASTRO D850 USER GUIDE
*CoolingModuleofAstroD850hasnoON/OFFswitch.WhenyouconnecttheDCpowertocamera,
coolingmodulebecomeONatthesametime.
!
* Astro D850 has no Temperature controller. When cooling get reach to stable condition the CMOS
temperaturewillbeit’smaximumcoolingstate.
*PS1204isaDCstepdownadapterforTECmoduleandit’sadjustedformaximumcoolingperformance
ofheatsinkandcoolingfan.PleasedonotuseDCpowersupplyofothercompanies.!
!
*BackFocusDistanceofAstroD850is44mm(CM2C)/46.5mm(CM2N),ThesearesametoCanon
EF-mountorNikonF-mount,andadjustedattheconditionof2mmthicknessglassfilterinstalledatthe
drop-infilterholder.Ifyoutaketheshotswiththecameralens,incaseofnofilterindrop-infilterholder,
infinityfocusingerrorwillbeoccurred.Werecommendtoinstallafilter(2~3mmthickness)intodrop-in
filterholderalways.
(Recommendedfilters:HoyaMCClear,BaaderUV/IRcut,IDASLPSP2etc)
*IncaseofBaader2”filters,youcanuseonlyLowProfileFilterCell(LPFC)products.
*TECcoolingmodule ismoreefficient whentheambient temperatureishigh buttheefficiency islower
when the temperature is low in the winter. This is due to the electricity consumption per temperature
characteristicsofthePeltierelementswhichisoneofthemostimportantpartsintheTECcoolingmodule.
Asaresult,thecooledimagesensortemperaturemaynotreachtomaxcoolingtemperatureof[product
information]inthewinterseason.
!
*ThecameratemperatureshowinginBackyardNikonorotherAstroimagingprogramsisnottheactual
sensor temperature but the temperature at the temperature sensor installed on the PCB circuit board
placedbehindtheimagesensor.
**ThetemperaturevaluedisplayedatDTH-1isfromthetemperatureoncoldfingerandit’sneartoreal
CMOStemperatureandthetemperaturethatAstroimagingprogramsisdisplaying(fromNikonexifdata)
isabout3-7Chigherthanthisvalue.
!
*Ifthecameraisexposedtotheairoutsidewiththecoolingmoduleoffforextendedperiodoftime,the
cameracanbeinternallydamagedduetoproblemssuchasshortcircuitscausedbycondensation.!
!
*Ifyouhavetoleavethecameraoutsideforextendedperiodoftime,coverthecamerawiththedew
shieldcoverassoonasturningoffthecooler.
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CENTRALDS ASTRO D850 USER GUIDE
Characteristics of the modification
•AstroD850ismodifiedversionsofNikon’sgeneralpurposeDSLRcameras.Some
oforiginalfeaturesoftheNikoncameraareremovedandnewfeaturessuchasTEC
cooling and general purpose Drop-In filter holder are added for high quality
astrophotography.Followingsarethedifferencesmadebythemodification.
1. Low Pass Filter of original CMOS
sensorwasremoved.
2. In Astro D850 Hoya Clear filter
installed  , and image blurring can
occur due to chromatic aberration
on the infrared lights recorded on
thesensorsotheimagesharpness
cansuffer.!
This is more pronounced in the
imagestakenwithrefractionoptics
thanreflectionoptics.!
We recommend you to install in
Drop-In filter holder UV/IR cut
filter, light pollution filter and deep
sky filter at the same time while
imaging.
3. WithAstroD850,youcantakeIR
images by mounting a visible light
blocking/infraredtransmittingfilter
suchasaHoyaR72filter.
4. Various2”imagingfiltersor52mmfilterscanbemountedintheDrop-Infilterholder.
5. Drop-InFiltersystem(CM2C/CM2N)doesnothavethecommunicationcontactpointssotheauto
focus,lensinformationrecordingandpulsesignaltransferformotoroperationwhicharebasedon
thecommunicationbetweenthecamerabodyandthelensaredisabledevenwhenaCameralensis
used.
6. IncaseofDrop-InFiltersystem(CM2C/CM2N)youalwayshavetofocuslensesmanually.Some
lenses need power from the body for manual focusing and you cannot focus these lenses even
manuallywhentheyaremountedonAstroD850.
7. ViewFinderwasdisabled.
8. ShutterspeedcontrolbyMechanicalshutterisnotvalidinsub-secondexposure,onlybevalidinBulb
Shutter mode.If you are to take sub-second shots, use electric shutter mode [= ‘silent live view
photography’setting].
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CENTRALDS ASTRO D850 USER GUIDE
SafetyoftheUserandtheCamera
Follow these safeguards and use the equipment properly to prevent injury and
equipmentdamage.
1. Donotleavethepoweradapterandthepowercordnearanobjectemittingheat.Thiscancausefire
duetodeformationanddamageoftheinsulator.
2. Donotusethecameranearinflammablegas.
3. Iftheinternalpartsofthecameraareexposedafterthecameraisdroppedorthecamerahousingis
damaged,donotconnectthepowertothecameraduetodangerofanelectricshock.
4. Donotdisassemblethecamera.Itcancauseanelectricshock.
5. Keepthecamerafromthereachofsmallchildren.
6. Donotusetheequipmentindustyorhumidplaces.Thisistopreventfireandelectricalshock.
7. Do not use the camera with medical equipments. The electromagnetic interference can cause
malfunctionofthemedicalequipments.
8. Topreventfireandelectricalshock,followthesafeguardsbelow:
•Alwaysinsertthepowerplugallthewayin.
•Donothandleapowerplugwithwethands.
•Donotexcessivelybendthecord.
•Donotputaheavyobjectonthepoweradapterandcord.
•Donotconnecttoomanypowerplugstothesamepoweroutlet.
•Donotuseacordwhoseinsulationhasbeendamaged.
•Ifthesurroundingnearthepoweroutletisdustyorhumid,thepoweroutletcanbeshort
circuited.Cleananddrythesurroundingbeforeusingtheequipment.
•Donotusethecamerainsideacarunderthehotsun,underthedirectsunlightornearaheat
source.Thecameracanbedamagedorcausesskinburns.
•Donotusepaintthinner,benzene,acetoneorotherorganicsolventstocleantheequipment.
Doingsomaycausefireorahealthhazard.
ProductWarranty
CentralDSProvides1yearproductwarrantyforcustomerswhopurchasesbrandnew
AstroD850.!
Incaseof[Usersuppliedcameramodificationservice],CentralDSoffers60days
productwarranty.
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CENTRALDS ASTRO D850 USER GUIDE
AstroD850systemChart
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