Thanks to those that have been
doing the modification and providing advice and suggestions on
the instructions. I have been updating the instructions with user
suggestions. Here are some comments from those that have done
UPDATE: In January 2009, I set up the
Yahoo Group "DSLR Modifications" for discussing the
modification of DSLRs for astro and infrared imaging. Please consider
I have now done the mod
thanks to your procedure
Kevin's suggestions that have since been included in updates to
the instructions...Thanks Kevin!>
I removed the filter from the holder and put it all back together
as was minus that glass
seems OK, but haven't had clear
skies to test yet.
Can't wait the WSP in a few weeks to try it out.
I also taped all the parts to a piece of paper and numbered the
step they came from
I am not sure that all the reassembly
steps are really required as opposed to a simple "go backwards
I went through the printout and added the step number that the
parts "came from" (as labeled / taped to my paper) at
the applicable reassembly step (ie: Step 31 uses screws removed
in step 23)
Total mod time less than 2 hours thanks to you!!!!
Cool. Just got your email.
The procedure is already excellent and a great asset to us "do-it-our-selfers"
and i by no means want to make it look like i'm nit-picking the
procedure and belittle-ing it in any
Dan's excellent suggestions that have since been included in updates
to the instructions...Thanks Dan!>
just some of my comments. Again, your procedure was of great help
and i wouldn't have even attempted this without it. The camera
didn't work at first, but after taking my camera apart again i
found that one of the flex connectors wasn't seated properly.
Hope this helps!
Web Site: http://www.easternvoltageresearch.com/astronomy/astrophotography.htm
Saw your step by step guide- very well done. Wish it had been
around when I did mine (I used Terry Lovejoy's- very good too).
Camera fried the onboard power regulator, but as I discovered
the camera is capable of firing at 5fps. That means both the 10D
and the 300D are capable of burst speeds at 20D (mechanically),
however it remains to be seen if there is a 'bottleneck' imposed
on the data transfer rates. Seeing as it would take far more energy
to devise a way to slow down
the transfer rates it would make sense that the camera itself
is software- dummed down.
Just some thoughts- great astro work- I'm going to forward it
onto a few of my friends that have kicked that idea around.
little blue connector was mis-aligned and (according to Canon
Factory Service) it was burned out. I don't know that for certain;
it's just what they replaced...
had the same problem- the mis-aligned connector caused the shutter
to assembly to fire at 5fps (couldn't turn the camera off)- you
had to remove the battery.
a case of bad luck...
is excellent work! Thanks for the spending the time documenting
this. Regarding Peltier cooling I have just about got my next
prototype ready :) - but I want to stick with external cooing
for the time being.
have also updated my pbase page with a link to yours if thats
Web Site: http://www.pbase.com/terrylovejoy/300d_mods
posts on CloudyNights):
followed the directions from a gentleman by the name of Gary Honis.
He has created a step by step tutorial that after following to
the letter is FANTASTIC. You Really cannot go wrong if you follow
will say this though, The filter takes quite a bit of work to
free up fom the frame it is encased in. It actually took me longer
to remove it from the frame than it did to get to that point of
the modification . Just take your time and use the tools he suggests
and his techniques and you WILL succeed.
thanks for the congrats. I honestly wouldn't have attempted it
if it wasn't for your tutorial. The clean pics and very well written
instructions made it VERY easy to perform once I took that first
deep breath Lol. I followed your steps to the letter for removing
the window but found that mine was VERY well glued in place. I
used the same style exacto blade you did and just took my time
slicing through the glue being careful not to cut into the ledge
that the window sits in/on. I should have the Edmunds Glass just
after Christmas so we will see how that works out.
Gary, Thank you for an EXCELLENT tutorial.
Web Site: http://www.digitalastro.org/
posts on the Digital_Astro yahoo group):
got a 300D and today I modified it. I want to thank the great
link from Gary Honis about the procedure. I made all as he explained
and SUCCESS!!...now I have a modified
300D also capable of doing normal daylight photos!!! THANKS A
LOT GARY for the excellent web page on that!
only difference I made from you(r procedure) is that for cutting
the glass I used a normal glass cutter since I found it a bit
hard to make a deep enough scratch on the glass with a scribe
to cut it. I left the plastic protection on top of the glass and
cut it. Later I used a carburundum stone to make the necessary
adjustments to the sides.
fact, if one plans to use the camera only for astro imaging and
forget(s about) the autofocus feature no need to put a replacement
glass I suppose, only a UV-IR cut filter anywhere in the optical
train. What I found most difficult was cutting and taking out
the filter and replacing the new one. It happened that one of
the side plastic "ears" broke (so fragile they are)
that I had to glue it back but it turned out fine. Canon should
make that holder in a much stronger material. Also in my camera
I just had to put the razor in the tape area and the filter holder
came out without much difficulty, I didn't have to cut it.
a risky job anyway but with care and patience it can be more or
less easily done by everyone I suppose.
( Note by Gary: I
have updated the instructions and added a closeup photo as per
finished the mod today, took me two days due to work and not wanting
to do it while I was tired. I have never done anything electronic
and the lack of experience showed as I broke one of the ribbon
connectors. It was the one at step 21. I went to work this morning
all doom and gloom then thought of a way to fix it while at work
then fixed it when I got home. Used an old bankcard and some '5
minute Araldite epoxy resin' and two magnifying glasses so I could
get up close to the action.
didn't realise the ribbon went on top of the hinged part of this
specific connector, it is the only one that does so can I make
a suggestion, you should emphasise this (with pictures if possible)
on the instructions. I tried to slide the cable underneath the
hinge and thats how it broke.
else in the instructions was well written and easy enough to follow
but I would not like to attempt it again :)
Now all I hope for is the glue to keep its hold and the ribbon
to never fall out and the sky to clear.
warm Aussie thanks for the instructions,
( Note by Gary: I
have updated the instructions per Jaime's suggestions)
of all, thanks for your wonderful pages. I've actually "done"
the mod twice (first one I just removed the filter, and after
a few months, missing my camera for daylight use, installed the
clear filter). This last time, using your step-by-step guide,
was most easy, but unfortunately I have had to open the camera
3 times due to a shutter problem.
suggestion for inclusions:
on step 40: this cable goes really deep in the connector... I
just missed it the first time I opened the camera, not a big issue,
as it's easy to correct, but one suffers if it doesn't work on
the first try.
step 32: the biggest of the ribbon cables shown there is, IMHO,
the most difficult part of the mod. Reassembling it, I mean. It's
also important to notice the way it enters the connector, as it's
step 30, where I have had real problems. The black cover over
the filter (the one you show with a small crack and black paint)
must be really flat or you'll damage the shutter. Mine was not,
and I ended up removing it at all and very carefully repairing
the shutter. I've seen no problem with reflections or whatever
for the moment. (by the way, shutter problems show as error 99
on manual mode and error 05 on auto mode; it's easy to diagnose
if you select sensor clean).
thanks again for a very nice job! Cheers,
Web Site: http://personal.telefonica.terra.es/web/mediocielo
RE: 300D Modification (all done!)
another successful 300D conversion, thanks greatly to your web
tutorial. The camera fired up fine, image flaws are minimal, autofocusing
seems spot on, and everything's gloriously pink! I have now also
added the firmware hack and made my TC80N3 interchangeable between
cameras. I'm a happy guy today, though that was a nerve-racking
me at least.
provided suggestions which have been added to the directions.......Thanks
it. Of course the clouds have now rolled in! Again, many
thanks for your guidance in this.
taking some great test astro images with the modified camera,
Denis had this experinece:
discovered that two of the buttons on the back panel weren't working,
and I blamed this on a slightly damaged ribbon connector. A smart
fella would have left well enough alone, but I had to go and open
it up again, fiddled some more with the connector, powered it
up with the back off, and .. killed the camera. No display, no
lights, errors, nothin. Dead.
did a deep (and outrageous) disassembly in search of a possible
power problem. It took a lot of digging and some more de-soldering,
plus removing the lens mount and the front and top covers. I doubted
that things would ever go back together right. Way in there beneath
the on/off switch I found the dc/dc power board, a two-sided pcb
with no fuses visible. Surface-mount components were buried even
deeper, and further disassembly was beyond my already-stretched
I did next will offend all engineers and prudent people everywhere:
I 'deduced' where the buried blown fuse was by following the traces
and using an ohmmeter, then soldered a bridge across it!
came 2 more hours of reassembly, and my heart was thumping when
I fired it up. But..
It works, and seems to have all functions, except for slightly
quirky behavior of the back display, quite minor and not important
for astro-work. All the buttons and major functions are good.
learned: 1. Don't mess with a good thing; 2. It's possible to
'mend' a blown fuse in a Digital Rebel but it sure ain't easy;
3. For those considering the mod, be REAL careful of the ribbon
connector that goes to the camera back, it's the most fragile
of all and the first (and last) one you'll encounter; 4. Never
attempt to power up a partially disassembled camera.
Denis Slattery <-- breathin' a big sigh of relief
self deprecating remarks omitted in Denis's comments above:)
Denis's Web Site:
a quick note to say thanks for your instructions on the 300D mod.
I just did it in about 2 hours and all went well. I did not use
replacement glass and went with the Baader UV/IR cut filter. Pretty
hard to make a mistake with your detailed plans.
resource you put together.
was surprised how easily the filter holder came away from the
chip. I just put a very thin blade underneath and gently applied
upward presure. The whole assembly just peeled slowly away from
the double sided tape and left the tape neatly in place around
hardest part for me was actually removing the filter from the
black filter holder.
Venter's Web Site: http://www.dslrfocus.com
have modified my 300D according to your pages, thanks very much.
WNM's discovery that the size of the IR cut filter in his "EOS
300D" is different than the size of the IR cut filter in
the "EOS DIGITAL REBEL" sold by Canon in the Americas.
His notes have since been included in updates to the instructions...Thanks
by Gary: Ryan has made the modification for the primary purpose
of monochrome near-infrared pictures of landscapes.)
if you haven't heard any of this before, great work, and I mean
it from the bottom of my heart (what's left of it after the heart
attack I almost had as I first powered it up after performing
mod went fine, for the most part, when I first powered it on it
worked, which was a plus.
few things I ran into, mostly due to my own personal ignorance/incompetence,
and not due to your instructions, were:
cutting/prying the original filter I caught it with a point on
my blade, causing chips. The original filter is now useless, but
I don't care, don't plan on using it ever again now that I can
do my infrared handheld.
was ill equipped and very ignorant towards glass cutting, let
alone at this small of a scale. I used the scribe as suggested,
though with the coating on. This caused a poor break that went
right through the area I was planning on using, and not along
the line. I tried again without the coating and it worked very
well, though was slightly larger. I ended up grinding down the
inside of the holder to make room for it as I didn't have anything
good to sand/file it down with and it was around midnight. It
all worked out in the end.
used the cover of a binder (the clear plastic that lets you put
a piece of paper in the front) for spacers, it looks good so far,
but haven't done any astro stuff or looked at it too closely.
piece of advice I could give to anybody trying this is to take
a sedative first, do not attempt this mod after drinking a 24oz
Rockstar (hardcore energy drink, which works very well for all
nighters). I was shaking up a storm and am really surprised that
I didn't totally destroy my camera.
was smart and bought an extra piece of glass, which as it turned
out, I did not use and in face could probably make another filter
or two with the remains of the first piece. A big thanks to Edmund
Optics for the great glass.
I've probably said enough to bore you.
again for making my photography much less time consuming (and
I'm sure my fiance will thank you for that as well).
for posting the great set of instructions for modifying the Canon
300D(Rebel). Im currently working on one to convert it to
a dedicated IR camera by inserting a Wratten 89b equivalent glass
filter. Your instructions proved invaluable.
have a couple of comments that might help others:
careful with the focal plane adjustment shim washers under the
sensor mounting posts(3). On my camera they were not sealed in
and could fall out if the body is inverted. On the D30/60 Canon
seal these washers in place.
replacement glass or filter should have maximum dimensions of
26.9x19.4mm or it will not fit in the holder. The filter on my
camera was 26.9x19.45mm. These dimensions were checked with a
I have a small business converting Canon D30 and D60s to dedicated
IR cameras and plan to extend the range of cameras to the 300D,
350D and 20D. Im fortunate with the D30/60 in that I have
the Canon service software to adjust AF. With the other cameras
Ill need to adjust the sensor shims exactly to maintain
AF accuracy. Manual focus is adjusted with shims under the focusing
screen. If youre interested I have a small gallery of images
from cameras Ive converted:
again thanks. Best regards,
forgot to mention something else. The double sided tape holding
the filter to the sensor glass cover serves 2 purposes. The obvious
one is to hold the two together. Less obvious is the sticky strip
designed to catch any dust particles trapped inside.
Salmon's Web Site: http://www.asla81.dsl.pipex.com/IR_Examples/index.htm
Salmon's email address: firstname.lastname@example.org
post on the Digital_Astro yahoo group):
I'm so excited because I just modified my 300D successfully! To
prove it, here's a shot of me 'in the pink'. Hoping for a clear
Thanks to Gary Honis and his superb instructions.
I feel like I've just joined some sort of elite club!
Sharp's Web Site: http://www.astro-sharp.com
Thanks for your website. My friend John and I were greatly helped
by following your steps-to-steps procedures last month when both
he and I modified his 300D at my office. It took us one and a
half hour to make the modification when he completely removed
the filter (without replacement filter).
Raymond TSE, Hong Kong.
TSE's Web Site: http://mobile.yahoo.com.hk/
completed the modification last weekend using your instructions.
It took me only about 3 hours. Your instructions were excellent
and saved me many hours, frustration, and practically eliminated
the possibility of failure. Thanks for this excellent write-up.
thing of notice was that my IR filter was glued into the plastic
frame very securely. It was glued completely around the periphery
of the glass (How the heck do they do that so precisely and cleanly?)
and cutting the glue was difficult. It was hard to tell where
the glue ended and the plastic began. I would say that the cutting
process takes almost an hour alone and is extremely difficult
to perform without scratching or damaging the filter, which I
did. I did not intend to put it back anyway, since I intend to
use this camera strictly for astrophotography. It was not entirely
clear to me how to proceed when not performing a replacement.
I recommend adding to the instruction some detail on what parts
need to be replaced if no glass is intended to be inserted. I
re-inserted the plastic frame for the IR glass, the double sided
tape on the CMOS side and the thin gasket on the other side (even
though this had no obvious use anymore). So thats basically
everything but the IR filter. I was toying with the idea of not
replacing any of these parts, but it seemed necessary to be used
as a shim or to keep stray light away from the CMOS chip. True,
or was replacement of these parts unnecessary afterall?
message is from Dan Mccauley who also completed the modification:
Scott, I believe that even if you do need to replace the entire
plastic frame assembly even when not installing a new filter or
replacement glass. This prevents stray light from bounching from
metallic and other surfaces within the camera when the shutter
opens and possibly causing stray light to hit the sensor. Its
also important to keep that small gasket intact as well.)
a warning about the end tabs of the plastic frame may be appropriate.
These are quite thin and easily bent or broken, especially with
the pins that stick up. The pins make it difficult to place on
a flat surface to do the cutting. One of my end tabs got bent
a little during IR filter cutting and almost broke.
used clear nail polish to seal the plastic frame component after
getting as much glue off as possible. There was a lot of stray
bits that I was afraid might get into the optical train later.
The polish sealed these bits securely and also provided enough
stickiness while still wet to use as glue for the thin gasket
that used to hold the IR filter in place. Time will tell if this
was gluey enough for that purpose, but since the gasket is butted
up against the frame, it doesnt seem like it can go anywhere.
The polish was only intended to hold this piece in place long
enough to get it back together.
thanks again for an awesome write-up it was very helpful and professionally
As you read at cloudynights my modification worked. Thanks to
Dirk who made it 90% for me.
We ran into big problems getting the filter from the holder. Doing
it like you did, did not work at all. So we figured out a way
to get the filter out.
(Gary's Note: Ralph
and Dirk made a metal mask just alittle bit larger in size than
the size of the IR filter and also a wooden plug the same size
of the IR filter. They then used a bench vice to force the filter
out of the holder in small steps. I heard from one other doing
the modification that had some difficulty removing the IR filter
from the plastic filter holder. I suspect that some Rebels may
have more glue used than others for securing the IR filter glass
in the filter holder, since most modifiers do not have this problem.
I would suggest that my directions be followed and the appropriate
time taken to free the IR filter glass from the plastic filter
holder using a razor knife. I also think that it is best to re-install
the plastic filter holder as per my directions since it will block
stray light and dust from reaching the CMOS imaging chip .)
Another note from
We did modify the second 300D. <snip>
the second modification we made a perfect plexiglass mask, replacing
the rough metal mask used previously. With this tool and a wooden
plunger the filter could be removed very easily. But we ran into
another problem, stated by WNM of Shnaghai (see above). My modified
300D was a 1.5 year old model. The last modified 300D was a brand
new one. Both where bought in Germany as a 300D. (no gray market
My 300D had the same 19.6 x 27 mm size filter as yours.
The new 300D had the 22 x 28 mm size filter.
It looks like the new models do have different size filters. WNM
thought the difference in filter sizes was between Rebel and 300D
Mcintosh's 300D Gallery: http://home.arcor.de/ralph.mcintosh/html/mod__300d.html
have modified my 300D modified with the IR filter just removed.
I did not add any filter back. Thanks alot for your information!!
It is wonderful! : )
Man in Black
Ng's Web Site: www.astrofarm.net
thanks for your excellent instructions on the Canon Rebel Modification.
It wouldn't have been possible for me to succeed without it. Without
experience in this kind of work, apart from a Webcam modification
(SC1), it went fairly easy in about 12 hours (I worked slowly
and documented all the cable connections with close-up photos
before disassembly ).
Comments (already mentioned in your instructions):
· The size of Original IR cut filter in my camera - sold
in Europe under the label: EOS300D - is 27.8 x 22 x 2.7 mm +/-
· Quite easy to remove the filter holder from the CMOS-chip,
by carefully pressing the holder up and leaving the double sided
tape on the chip.
· The biggest problem and most time-consuming moment was
removing the Original IR cut filter, which was very tightly glued
all the way around the black plastic frame (IR cut filter got
ruined by my impatience of getting it off , but the actual need
of the original filter - in self-defence - is not great).
Best regards ,
Boras (57°42'N 12°54'E)
want to thank you for your wonderful detailed instructions for
modifying the digital rebel. I picked one up used and wanted to
modify it for astro work, did it last night and things went very
well, success! Many thanks to you.
are a couple of observations on my conversion. I ordered the glass
from Edmund and then took it to a Stained Glass shop and had them
cut it, they cut it into 5 very clean exactly sized pieces for
$10. They even left the blue plastic on, I figured they had way
more experience cutting small pieces than I did, and it worked
out great. The only difficult part, was
the original IR blocking filter, there was soooooo much glue that
it was almost impossible to get it out. I chipped it in several
places. I had to resort to solvents so that I would not break
the filter bezel. Acetone was not good, it started to melt the
plastic, alcohol did not affect it, but kerosene dissolved it
nicely, I then cleaned every thing in alcohol and I was back in
business. For shims I used brass shim stock .004" thick (0.1mm)
I drilled a 0.080" hole, which was the same diameter as the
Canon shim's hole and then cut them out slightly larger and that
worked great. Autofocus is spot on now. Here are some test shots,
I took today, no astro yet but that is coming.
camera went back together smoothly and fired up the first time.
again for all your efforts.
Web Site: http://www.snoleopard.com/
Thank you for your great description of the 300D-filter-removal.
It was very helpful.
had a job-split with a Canon-Contract-Office. They did the disassembly
and assembly work for me; I executed the steps for the change
of the filter to the edmunds glass (steps 27 to 30).
By the way: The note (above) from WNM of Shanghai is not completely
correct: The cameras which are sold in Germany (EOS 300D) have
exactly the dimensions (as your instructions) (The Canon IR cut
filter is 27mm by 19.6mm and is 2.7mm thick.)
You can see my first results with removed filter at this address:
pictures with no filter are M8, M20, M16, M17 an the 2 Veil Nebulas.
Greetings from Berlin, Germany
Web Site: http://www.space-watcher.de
(Gary's Note: The
method mark used by Mark to modify his camera, by having his Canon
Service Shop do the disassembly and re-assembly, seems like a
safe way to do the modification. Based on Mark's findings and
that of others above, to be sure of the size of the original IR
filter glass in a European camera, it would be well advised to
dissasemble the camera to determine the filter size before cutting
a clear replacement glass.)
I am from France and your website is great! I used it for my 300d
and had no problem with focus and autofocus.
It is very helpfull!
(Gary's Note: Matthieu
is preparing a web site about modification of the Digital Rebel
300D that will be in french.)
Thanks for your excellent mod procedure for the 300D.
I took the plunge today and modified my Canon 300D to remove that
nasty IR blocking filter. Just finished putting it all back together
and it works!!
Turns out I had one of those 28mm x 22mm filters in place.
Basically it all went roughly to plan. All except I had an awful
job getting the old filter glass out of its frame. It seemed that
they used half a glue factory to stick my filter in place. After
an hour of prodding and chipping the old filter and after deciding
I was past the point of no return anyway guess what I did?
I took a screwdriver and a hammer to it!! That sorted it out pretty
The other problem I had was removing the black gasket covering
the filter holder. It seems that all the glue they used sticking
the filter in place had bled onto the gasket and stuck that pretty
rigid too. I broke it twice getting it off, some black paint once
I had reinstalled it sorted that out.
bit I was most worried about, cutting the new piece of glass,
turned out to be a doddle, nice clean cuts with a rotary glass
cutter, in fact the fit was so tight I didnt even need to glue
it back in to the frame (I did an a couple of dabs of glue just
to be sure. Reassembling all of the internal ribbon cables was
a bit of a chore, I was worried that I might not have pushed them
home far enough. So when I put the battery back in and fired it
up I was delighted It all worked ok. All my normal images are
pink but that will be sorted by an XNite CC1 filter which should
hit my doorstep in a few days.
All in all it was a lot easier than I thought it would be. Scary
as hell though ripping open an expensive camera like that.
All I need now is a clear sky to test it under the stars!!!!
Thanks angain for a first class procedure.
In the process of getting up the courage to do the Modification
I removed just the 1st ribbon from its connecter. This ribbon
is seated deep and can be hard to remove. After swinging the hinge
upward and pulling on the ribbon it came out and so did the bottom
half of the hinge from the connector. Stress! There are connecting
teeth between the hinge and connector, and with some care the
hinge will snap back into place with the connector. This connector
is very fragile; the ribbon is in deep and is well seated. All
other connectors can be gently removed and reassembled. It was
great help to me, to make note of how deep the each ribbon was
inserted into the connector before removal. I was then confident
that the camera would power up fine, and it did! Also a small
block of wood with two small holes drilled for the filter frame
will greatly reduce the chances of breaking the plastic tabs when
removing the filter, and yes the filter is glued in well!
Wear one or more reading glasses stacked, this stuff is really
small.The Mod. is not hard to do; just a-bit scary when confronted
with that 1st connector, after that its all down hill.
did not replace the filter with glass in my camera.
a million Gary!
has a web site and photogallery here: www.robsastroimaging.com
just wanted to thank you for your excellent web page on modifying
the Canon Rebel 300D. Your instructions were very thorough, and
the modification went perfectly! The only dificulties that I encountered
were in getting the first two ribbon cables reconnected when putting
the camera back togther, and getting off the black gasket from
on top of the filter glass. You made a very good point about noting
exactly how the large cable from the cmos chip fits back into
its hinged connector. I took a close up picture which was instrumental
in showing me how to put it back together. Reconnecting the two
cmos cables was in my opinion, the most difficult part of the
procedure. The black gasket over the IR filter was VERY difficult
to get off. It really got beat up pretty bad when I took it off.
I glued it back on the best I could, but I did use a little black
tape in spots to cover up places where the gasket broke.
again for your great instructions!
Another note from
my opinion, the hardest part of the mod is taking off the gasket
above the original filter. I tried loosening the glue with the
exacto knife, but it really did not want to come off. Once the
gasket broke in several places, I tried just pulling it off. That
seemed to work, and if I were to try it again, I think I would
work one corner loose and pull it off.
If you completed the modification
and would like to let me know how it went for you, you can contact
me at the following email address:
I will add any comments to the
modification instructions that might be helpful to others and
a link to your site if you wish.
UPDATE: In January 2009, I set up the Yahoo Group
"DSLR Modifications" for discussing the modification
of DSLRs for astro and infrared imaging. Please consider joining:
for links to web sites of others who have done the modification.
2: Plans for Peltier Cooling
Continue to Astro
Images: Gallery of astro images
with the modified camera
To My Astrophotography & Digital Imaging
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