I was searching on the net for possibility on modding the 300D to become an IR DSLR and fount his guide.

http://ghonis2.ho8.com/rebelmodnew.html
http://wnm.lamost.org/article/300dmod.htm

Seems like it is suitable, but I can't really confirm if the result will have high shutter speed when the IR cut filter being replaced by Hoya R72.

Any experts out there to comment?

This post has been edited by Drudkh on Oct 4 2005, 05:39 PM

What you need to worry about here isn't whether there will be an improvement in the shutter speed, removing the IRC filter will ALWAYS improve shutter speeds for digital IR photography; The thing that you should be thinking long and hard about is whether you would want to attempt this yourself.

With Nikon cameras, a very small Phillips screwdriver is all you need to get you from the outside right to the sensor. There's no cutting involved and if you remount the original filter some time later, it's almost impossible to tell that anyones been messing around inside. From the write-up in the links, I'd think it unwise to mess around with the Canon cameras.

Matt

Thanks Matt.

I was thinking if purchase a 2H 300D is cheaper than a 2H D70 to mod.
Hmmmm........

By the way, after modding be it 300D or D70, will the metering be inaccurate?

This post has been edited by Drudkh on Oct 4 2005, 11:35 PM

Hmmm, should be ok if you have a second cam, but try to check with Canon service center to see if they will do the change for you for a small charge. If they will do it, you'll save yourself some stress

The metering, after modding, will be inaccurate. This is because the meter was calibrated for the light intensity after it passes through the AA/IRC filter stack. Under most circumstances, you'd need to set a positive exposure compensation of at least +.5 to +1. This would reduce the shutter speed from say 1/1250 to ~1/800. Without this compensation, the photos would come out underexposed.

Cheers,
Matt

This post has been edited by deadpixel on Oct 5 2005, 10:01 AM

I see. Thanks for the answers, Matt. You're very helpful and your knowledge is .

LoL! Just got a reply from Canon Singapore, they don't provide the service.

Hi Drudkh,

I am the author of the Canon Digital Rebel modification web site you asked about.

Yes, removal of the original IR filter will have an affect on the camera's shutter speed. In my instructions I detail how to remove the original IR filter and replace it with a coated clear glass window so that autofocus and manual focus through the camera's viewfinder is preserved. If an external color correcting filter is used for non-IR work, the camera functions as an un-modified camera. If an external color correcting filter is not used, the camera's imaging chip is more sensitive to Green and Blue and much more sensitive to Red and Infrared because the IR blocking filter has been removed.

If an IR filter such as the Hoya R72 is used on a camera lens with the camera, exposure times are similar to that of a non-modified camera and the camera's autoexposure can be used to get the exposure close, then adjust exposure from there. The tricky part is getting good focus since the view through the camera's viewfinder is black.

Matt has a valid concern about deciding to do the modification yourself. All of the modifiers using my instructions that have gotten back to me to date report success, except for one, as detailed on my site. He damaged a ribbon cable trying to reinsert it and is sending it to canon repair.

I explain some of this on a page with daytime IR images here:

http://ghonis2.ho8.com/rebelmoddaytime.html

I have done comparison tests of taking IR images using the Hoya R72 filter on the modified Rebel (300D) to taking IR images using the Hoya R72 filter on a stock Canon 10D, to compare the exposure times, demostrate how much longer the exposure needs to be with an unmodified camera and determine any hotspot issues. I hope to have the web site updated with the comparison results soon.

I modified my Rebel for astrophotography but I'm having lots of fun using the camera for daytime IR:)

Gary Honis

Thanks Gary for the reply. Sorry I have been busy and did not see your reply. Looks complicated. Guess I'll have to give this a miss. Still wanna thank you for letting me and everyone else know the situation you've encountered. Happy Shooting!

Look at this website...http://www.pinardy.com/index.php.
This guy has been using a modified 300D....