modding 1000d

[adamsp123]

So can you use a separate IR filter such as the Astronomik IR block filter or Baader UV/IR or the Astronomic CLS with IR block and still get the Ha emmisions?

If this is correct I can go ahead and order a 2" screw on IR filter.

[astrokat]

ive been looking on the net any one put a link up for one of these filters oh poo guess im gonna have to do this again

[astrokat]

So can you use a separate IR filter such as the Astronomik IR block filter or Baader UV/IR or the Astronomic CLS with IR block and still get the Ha emmisions?

If this is correct I can go ahead and order a 2" screw on IR filter.

i hope this is posable dont want to have to do this again lol

[adamsp123]

Looking at the data you should be able to use an add on IR filter but I think I will give Bern at modernastronomy a call tomorrow unless we get a definitive answer by someone in this forum.

[themos]

Yes, call him, although I'm sure there's an appropriate IR filter you can use.

[astrokat]

could you let me know what you find out as im off to work that would be great

thanks toby

[George]

There you go

You don't need the IR filter to get the colours right, a simple fiddle with the colour balance will get rid of the red caste.

[themos]

An IR filter will do more that post-processing can ever do though. There is IR signal getting to your sensor that you just don't want. Once it's registered on the pixels, you can't tell it apart from the Ha. It's like adding your own light pollution to the image, why would you ever want to do that?

[George]

My Canon 1000D has no IR filter fitted and I don't have problems with IR signal, taking dark & bias frames gets rid of a lot of noise that was showing in astrokats image.

[adamsp123]

I talked to Bern,

he recommends an astro IR add on filter eg a Astronomik Luminance,IR or CLS CCD type with the IR block or Baader.

The Canon CMOS sensor is quite sensitive to IR to quite long wavelengths and will tend to swamp the Red and Green of the sensor matrix.

If in doubt give Bern a call at Modernastronomy

Hope that helps

Pete

[George]

I forgot to add I use a CLS filter.

[astrokat]

so it looks like im gonna get the cls ccd though have not got the pennys at the mo my dsi came with filters one is a ir filter i think will this done the job for now

[adamsp123]

Bummer for me is that before deciding???? to do my own mod I had just bought the visual version of the CLS now I will either mod the canon myself and get another screw-on IR filter for my MPCC or send the camera away for a full replacement mod.

[Sam]

You do not need an IR filter, as George mentioned above. You do need to make sure you take calibration files for your images to reduce noise and optical effects. If you have a bit of light pollution around then a CLS filter can help (though I wouldn't really know as I don't use one).

Sam

[adamsp123]

I forgot to add I use a CLS filter.

is it the visual or CCD version George?