DSLR Modiffication help!!!

[Aeseir]

Hi guys,

I'm looking at astro modding my canon eos 40d to full spectrum capability.

Now a mate of mine advised not to bother doing that until i get a IR Cut/Block filter for it otherwise i won't be able to capture RGB channel clearly.

Can anyone advise how i can get over this hurdle?

I haven't been able to find anything online so struggling atm.

Help is very much appreciated.

I love the ability of capturing DSO with my DSLR and just want to build it up further.

[Tinker1947]

I had a new 600D supplied by Cheapastrophtograpy, it works well astro and normal photography although i took the cheapest mod option.....

" If you want to use the camera for occasional daylight photography, please use auto white balance and setk (WB SHIFT/BKT ) to B9G9 in the camera's menu. I have increased slightly those values so it will cover most typical daytime light conditions. When you want to use the camera for astrophotography, you can set the parameter backt to B0G0 and WB to daylight.

It is also advised to use the camera in AV mode for daylight use (as 90% of photographers do). Please notice that any other white balance setting: daylight, tungsten, etc will produce pictures with the typical tinge of astromodified cameras.

This white balance correction works well in daylight photography. If you want to use the flash, you will have to call it via the external flash button in the camera. Otherwise, the camera will ignore your selection of white balance to AWB and it will change automatically the setting.

There is a situation where the auto-correction does not work well, though. This is during non-astronomical photography at night in artificial tungsten illumination. For those situations, it is advised that a custom white balance is taken. The same white balance can always be used under those circumstances. 

The LP1 anti-aliasing filter (AAF) in your camera has been retained. Please remember to keep the setting 'autoclean' to 'disable' when using it for astrophotography in order to avoid the camera messing with your flat frames 

( the optical train changes slightly when the AA filter shakes in order to clean the camera, thus voiding your flat frames for the night)."

[Aeseir]

Thanks for that. So the plan is not to use this for anything other than astrophotography. So I got all the stuff covered regarding what to do once modding it.

My concern is for when taking imagines that are not in IR spectrum you need IR Cut/Block filter of sorts to be able to capture RGB. Without it you will always capture IR spectrum which will in essence override the standard RGB colors.

I looked at getting IR Cut/Block filters but cannot find anything. I can find filters that will return white balance but thats not it.

One thing i looked at was filter wheel but it seems pointless at this stage with a DSLR.