anat
sage
Reged: 06/03/04
Posts: 266
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Hello
I took my 450D apart to cool its CMOS chip directly. These are parts to be re-engineered 
Anat
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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anat
sage
Reged: 06/03/04
Posts: 266
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Necessary parts are re-assembled with a peltier cooling assembly. The camera is sealed in a plastic bag for a testing purpose.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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anat
sage
Reged: 06/03/04
Posts: 266
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This picture shows how the cold finger is connected to the CMOS chip.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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nofxrx
Vendor (HyperCams & Mods)
Reged: 07/12/05
Posts: 2888
Loc: Palm Bay,Florida
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Thats cool.Cant wait to see the results.
I am curious though,how do you know WHICH parts of the cam are needed in order to take pitures and save or transfer to comp? Or are you ising all the parts EXCEPT for the body
I am curious because I really want to do the same thing to my D40xa...take it apart and put active regulated cooling on it..and maybe "fabricate" or rig the body to protect the inner parts of the cam...
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Brent Oliver
1 loving wife,3 rescued dogs
In desperate need of winning Lotto ticket 
HyperCams&MODS
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anat
sage
Reged: 06/03/04
Posts: 266
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Temperature drop curve. Temperature drops 55F (30C) within 8 - 9 min.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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dlock
member
Reged: 07/26/08
Posts: 81
Loc: Tucson, AZ, USA
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Anat,
Very cool. I have been wanting to try this myself. I even bought a dead 350D to rip apart and use as a non-working prototype. I'll be very interested in your progress!
The complexity of the packaging in the 350D was touch intimidating. I am sure the same is true for the 450D. It crossed my mind several times that reconstructing the camera differently than intended may very easily leave me with a dead camera.
Did you mount the sensor back into the factory frame? For my purposes, the alignment between the sensor and the axis of the scope had to be very close (at f/2). This tolerance made me think twice.
Did you shed any non-astro related components? Such as the LCD, mirror, flash, many of the setting buttons and knobs, etc. Much is not needed, but taking a component out may kill the camera.
Wow. I just saw your third photo. Really great. It looks like you read my mind, or something! More photos?
Do keep us informed! 
Edited by dlock (02/07/09 06:51 PM)
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anat
sage
Reged: 06/03/04
Posts: 266
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This is the test result. I took 10 min dark frames under uncooled and cooled conditions. You can see the improvement. The standard deviation reduces from 241 to 22. Good news is that the histogram of the dark frame is very close to the bias frame. It means the dark current noise is almost eliminated. If you have any comment, let me know.
I would like to thank Gary Honis (http://tech.groups.yahoo.com/group/DSLRmodifications/)
for providing very useful information for modifying the 450D.
Anat
Edited by anat (02/07/09 07:18 PM)
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anat
sage
Reged: 06/03/04
Posts: 266
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Hi Brent and dlock
Please see the attached photo. Marked in red are parts needed for the camera to work properly. You can see that there are several parts that don't have feedback to the main DIGI3 processing board. Only ribbon cables #1, 6, 10 and 11 are required.
Anat
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anat
sage
Reged: 06/03/04
Posts: 266
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dlock:
To avoid the alignment problem, I keep the lens-to-CMOS frame. See the photo.
Anat
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anat
sage
Reged: 06/03/04
Posts: 266
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Quote:
how do you know WHICH parts of the cam are needed in order to take pitures and save or transfer to comp? O
I simply remove ribbon cables one by one and see which cable make my 450D stop working
Anat
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Ian Robinson
Pooh-Bah
Reged: 01/29/09
Posts: 1496
Loc: Gateshead.NSW Nth Coast,Austra...
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Interesting : BUT these stock DSLRs are not engineered to cope with rapid large amplitude thermal cycling . Pelters and multistage pelters cool very rapidly.
Properly astroimagers incorporating thermoelectric cooling (pelters) are engineered to cope with this .
The soldered connections in the DSLR wont have enough give and you are likely have connections at or near soldered points to key components fail and become open circuits . What are you doing to minimise the likelihood of this happening ?
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anat
sage
Reged: 06/03/04
Posts: 266
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Dear Ian
Thank you for your comment. I am aware of thermal cycle fatigue. There is a 1.35mm gap between the CMOS chip and the circuit board on the back. The cold plate is thinner than the gap. The air gap provides some insulation between the cold plate and the circuit board.
The CMOS chip and circuit experience one thermal cycle per one use. The thermal fatigue life of solder joints is usually in the order of 1000++ cycles. I hope the DSLR can survive
Anat
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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dlock
member
Reged: 07/26/08
Posts: 81
Loc: Tucson, AZ, USA
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Wow. Thanks, Anat. Keep us updated. Very interested!
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nickatnight
Carpal Tunnel
Reged: 04/14/08
Posts: 2036
Loc: Santa Clarita, CA (LA Suburbs)
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I was dreaming of something like this while I was doing my XTi Baader Mod. Then I got it all back together and the dream faded. Your photos are realizing the dream! Best of luck you brave soul, and keep us posted!
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nickatnight
Celestron CPC 9.25" GPS
Lumicon 2" LumiBrite Diagonal
Meade s5000 18mm UWA, Meade 6.7mm UWA,
Parks G.S-5 10mm, Celestrom 40mm Plossl
Parks 2x Barlow, Meade Tele-Extender
Celestron f6.3 Focal Reducer
Lumicon UHC Filter and Deep Sky Filter
Canon Rebel XTi (prime)
Canon Powershot G9 (afocal)
Canon EOS T-Ring and Parks T-Adapter
Lumicon Univ DigiCam Adapter
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Nils_Lars
Post Laureate
Reged: 01/04/08
Posts: 4229
Loc: Santa Cruz Mountains , CA
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I am amazed and have great respect for you guys who can do this kind of work.
I am looking forward to first light
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Erik
Orion Atlas Self Hypertuned (EQMOD)
Orion ED 80
Williams Optics VII reducer
Celestron 8" SCT
Orion Starshoot Autoguider
PHD guide
Canon 500D Gary Honis Mod w/Baader filter
Astronomik CLS , 12nm Ha , and OIII clip ins
Bahtinov mask
Canon EF 50mm f/1.8 II and Nikkor 180mm f/2.8 ED lenses
NexImage webcam
http://www.flickr.com/photos/31986095@N05/
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anat
sage
Reged: 06/03/04
Posts: 266
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I made a step further. The camera is put in an aluminum case.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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anat
sage
Reged: 06/03/04
Posts: 266
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The camera will be placed in an air-tight plastic bag for sealing. The camera mount with the T-thread (M42p0.75) is fabricated. The mount is isolated from the case. So, there is no need to seal the case.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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gquinzi
super member
Reged: 10/26/07
Posts: 152
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This is some pretty hardcore stuff. Anat, what is it you do for a living? I have to ask
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Orion 80ED w/ WO .8X FF and WO focuser upgrade
ST-80
Meade 8" SCT
F6.3 F/R
LXD75 Hypertuned w/Star patch GPS
Baader modified Canon 350D
DSI Pro
PHD Guiding
DSLR Shutter
Orion Dynamo Pro 17 (power tank)
A couple o' Naglers
A couple o' generic plossl's
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anat
sage
Reged: 06/03/04
Posts: 266
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Disaster mitigation research
I am sure that I am not going to turn this hyper-mod into a disaster
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anat
sage
Reged: 06/03/04
Posts: 266
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This is the shape of my completed camera.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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anat
sage
Reged: 06/03/04
Posts: 266
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This is a 15min dark sub at ISO400 and -3.1 degC. The histogram is very close to a bias sub. Noise is definitely lower than that from my old QHY8 !.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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anat
sage
Reged: 06/03/04
Posts: 266
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This is a bias sub for comparison. I am very impressed with this Canon CMOS.
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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DrGolds
super member
Reged: 04/06/08
Posts: 182
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Maybe we can get Canon to release an astro version of their DSLR with the Peltier cooler built-in 
Nice work! Can't wait to see some astro pics with your new camera.
-Jeff
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Meade 10" LX200-GPS
 Stanford, CA
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nofxrx
Vendor (HyperCams & Mods)
Reged: 07/12/05
Posts: 2888
Loc: Palm Bay,Florida
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All I can say is......WOW.......WOW.
I cant WAIT for an actual image from this beast!!!
BTW,the workmanship looks very top notch!
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Brent Oliver
1 loving wife,3 rescued dogs
In desperate need of winning Lotto ticket
HyperCams&MODS
BLOG
My Gallery
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seeker372011
scholastic sledgehammer
Reged: 03/05/04
Posts: 927
Loc: Sydney , Australia
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what nofxrx said
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ED 80 on a CG5 mount;ED 127 on EQ6; QHY8, 20 x 80 LW Obies;PST;10 inch GSO dob
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Psion
professor emeritus
Reged: 04/27/05
Posts: 698
Loc: Czech Republic, Prague
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Very nice Anat!
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Newton 200/800, 200/1200, 100/1000
Sky-Watcher ED80 + mount CG5 GT
PENTAX 75 SDHF
Mount Celestron CGE
Meade LX200R 8" OTA
EOS 300Da, SBIG ST-402ME, SBIG ST-2000XM
Spectrograph SBIG DSS-7, LHIRES III
Mintron 12V1C-EX modif (amp off)
http://astroview.psionfired.com
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eppich
newbie
Reged: 02/22/09
Posts: 1
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Hi Anat!
1000 thanks for your hypermod!
What is the part-number (eg. 127-????) of the peltier-Element you used? Do you have exact dimensions of the cold finger? (Length, width?)
Many Thanks, Peter
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Freddy WILLEMS
Carpal Tunnel
Reged: 11/13/05
Posts: 2898
Loc: Hawaii, Honolulu
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That is Super - really cool !!!
You're sure you do not have any part left over ?
Freddy
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Freddy
Meade 14" LX200 GPS UHTC GPS on permanent pier
Celestron C 14" Peltier cooled for planetary imaging.
Meade 10" LX200 & TITAN 50:1 mount Gemini 'go to'
Meade 127 mm f/9 APO & TITAN 50:1 mount Gemini 'go to'
W/O 102 mm f/7 APO doublet
Orion 80 mm f/7 ED
DFK 21AU04.AS
ToUcam 840 II pro
Canon 10D Unmoddified
Canon 40D Hutech moddified
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anat
sage
Reged: 06/03/04
Posts: 266
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Quote:
Hi Anat!
1000 thanks for your hypermod!
What is the part-number (eg. 127-????) of the peltier-Element you used? Do you have exact dimensions of the cold finger? (Length, width?)
Many Thanks, Peter
I use the model# TEC1-12704. Its dimension is 40mmx40mm. It draws 3.7 A at 12V. I am preparing the instruction on doing this hyper mod including the dimension of various parts. Please wait for about a week.
Regards,
Anat
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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soreneck
scholastic sledgehammer
Reged: 04/01/06
Posts: 953
Loc: Toronto, Canada
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Excellent modification, the form and function appear to be quite elegant. Looking forward to seeing some astroimages.
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Adam
TMB 130SS / WO 66 Triplet
QHY9 for sale (PM me if interested)
STL-11000M (new to me!)
Modified Canon 450D
SkyWatcher EQ-6 Pro
Urban backyard roll-off observatory
One small but fearless dog (observing companion)
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Kentari
scholastic sledgehammer
Reged: 11/19/06
Posts: 794
Loc: Belgium
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This is so cool, Anat! I'm full of admiration of your skills and guts to actually do it.
I'm looking forward to the tutorial, but I doubt I'll dare it...
Koen
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Darkstar 355 f/5 Dobsonian
Orion UK 8" f/4.5 Newtonian and WO ZS 80 FD on Losmandy GM8
Canon 20D DIY mod with Baader filter
A bunch of lenses: 10-22mm f/3.5-4.5, 17-40mm f/4, 50mm f/1.4, 70-200mm f/2.8, 300mm f/2.8
www.koenvangorp.be
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anat
sage
Reged: 06/03/04
Posts: 266
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The hypermod instruction is online at:
http://thaiastro.nectec.or.th/hypermod/
If you have any comment or suggestion, please feel free to tell me.
Regards,
Anat
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Astro-physics 155EDT
Borg 60ED
Losmandy G11 Gemini
Hypermodded Canon 450D, Nikon D90
SBIG SG-4
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Kentari
scholastic sledgehammer
Reged: 11/19/06
Posts: 794
Loc: Belgium
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Very interesting read, Anat.
It's kind of a pitty to loose the possibility of using Canon lenses, but it does make it simpler. For some lenses the bayonet without connectors would suffice, but many need power to use stopped down. My 300mm f/2.8 needs power from the camera to even focus manually...
Clear skies,
Koen
--------------------
Darkstar 355 f/5 Dobsonian
Orion UK 8" f/4.5 Newtonian and WO ZS 80 FD on Losmandy GM8
Canon 20D DIY mod with Baader filter
A bunch of lenses: 10-22mm f/3.5-4.5, 17-40mm f/4, 50mm f/1.4, 70-200mm f/2.8, 300mm f/2.8
www.koenvangorp.be
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Kim Miau
Pooh-Bah
Reged: 07/17/06
Posts: 1181
Loc: Australian National University
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Thanks for the guide! It's time to look for a used 450D to modify~
Thanks anat!
--------------------
-Robin Lee
My Astronomy Blog - http://www.astronomynotes.net
Meade 8" LX90 + LPI + QHY5 + Denk's Power x Switch S2 Diagonal
More equipments @ here
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