Infrared?

[hollis_f]

I've just got my 20D back after it's been modified for IR photography (720 nm filter). Are there any good targets that look different in IR?

[Catanonia]

I've just got my 20D back after it's been modified for IR photography (720 nm filter). Are there any good targets that look different in IR?

North American Nebula NGC7000 ?

[PM01]

Lagoon. Trifid. Anything with a bit of red to the emission line.

You'll like it.

[Adrena1in]

Is is possible to get such filters to attach in the image train, so that the camera doesn't need modifying?

[hollis_f]

Is is possible to get such filters to attach in the image train, so that the camera doesn't need modifying?

It is. The problem is that the unmodified camera has a filter over the sensor that removes most of the IR - so you need very long exposures. As astrophotography is already grasping for every available photon it's not really feasible.

[mypoppy31]

I had used infrared for a brief time and then seemed to have forgotten about it. But, as I pursued some info on the capabilities of filters, I realized that there was much much more to infrared, so here I am, back from the almost dead!..

I now have realized that I should pursue more "subjects" to photograph which would then inspire me to continue on.. I'm a retired older man and at my age, I need some pushing at times to get me out and going!..

I'll try to attach one of my youtube video/slideshows to let you see what I've been doing with infrared.

If anyones interested in seeing the other "infrared" video/slideshow, just let me know, and I'll post it...

http://www.youtube.com/watch?v=mWJIvOHiWmY

[SteveInNZ]

Lagoon. Trifid. Anything with a bit of red to the emission line.

You'll like it.

The filter that's been fitted blocks anything below 720nm which will include the red hydrogen lines.

[VIGER]

Orion I think would be a easy and good one no?

BTY I still have a modified 20D for sale. Once sold I have a 5D that I want to mod.

[jblaschke]

The filter that's been fitted blocks anything below 720nm which will include the red hydrogen lines.

Well, not entirely. There's some leakage--more red than blue, obviously. I'm planning on having my XTi converted to IR eventually and had wondered about the viability of astrophotography. Obviously, lack of Live View is a draw back.

There are the "Goldie" IR conversions, I believe the filter is in the 650nm range. I imagine this would be more AP friendly, even though the terrestrial colors are surreal...

[swag72]

I have just bought a modded 10D - What PP tricks do you need to do with IR oics taken of the heavens?

[m3n00b]

Stupid question: Why do manuf's filter out IR?

[SteveInNZ]

Stupid question: Why do manuf's filter out IR?

The camera sensor can see IR light but people can't. Normal people want to take photos of things they can see and not of things that they can't see, so the IR filter limits the sensitive range to the same as people.

Steve.

[PM01]

Also consider that many of the lenses out there are not designed to be well corrected out to the IR region, thus different focus points for visible and IR.

[jblaschke]

Stupid question: Why do manuf's filter out IR?
As others have said, the image sensor picks up near-IR that the human eye cannot. Since IR focuses at a different point than visible light, if hot mirror filters weren't in place, image softness and distorted colors would degrade overall image quality.

[tiagomaya]

can any one responde to this:

If i modifie the sensor on my camera.....it will never make normal exposuers? if you know what i mean.
it's like having the IR filter on my lens but not with the long exposure issue»

[swag72]

can any one responde to this:

If i modifie the sensor on my camera.....it will never make normal exposuers? if you know what i mean.
it's like having the IR filter on my lens but not with the long exposure issue»

Absolutely right. It is good to be able to take IR pictures without having to worry about the long exposure times that the filters add.

[aydim]

Love IR Photography

http://i.pbase.com/o2/57/861057/1/117849633.DRBLuQ50.1SAL09.jpg