Carina with clip in filter

[Gvarouha]

Finally a clear night to test the clip in filter I purchased off a fellow IIS member.

Although it was a super hot night (sensor temp was 30 degrees), with dithering most the noise disappeared during stacking.

I tried this same target before the filter and could only manage 120sec subs before sky glow overwhelmed, I would definitely recommend to anyone who is suffering from light pollution.

As always any comments or critiques are welcomed.

18 x 600sec lights
15 x darks
15 x flats
15 x bias

Cheers

[paul71]

Very nice results George, what filter and camera did you use?
Cheers Paul.

[Gvarouha]

Hey Paul
Camera is a 40d with an astronomic Cls eos clip.

[bigjoe]

Good effort George.:thumbsup:

Love these Astronomic CLS filters for longer subs in light polluted areas; just as you have done.

Yes and they actually do work- no bull!

I find I can also use mine for bringing out planetary detail, especially if the object is very bright viz Jupiter

bigjoe

[Gvarouha]

Joe,

I'll keep that in mind for planetary.

I have to say I'm really surprised, at the results. Next step would be to try a dimmer target.

[raymo]

Nice job George. Don't waste your time taking biases if your darks match your lights. Darks contain bias data.
raymo

[bigjoe]

Do so, and keep up your good work George.:thumbsup:

My wife only really noticed how easy the Great red spot (makes it much redder) and bands can be last night/early morn, due to this filter- it popped right out (and the hollow it sits in)- its amazing!

bigjoe.

[bigjoe]

That's a great tip for a lot of us Raymo.:thumbsup:

Cheers bigjoe.

[Gvarouha]

Raymo,

How does the stacking software (dss in this case) differentiate between read noise of the chip and dark signal?

[LightningNZ]

It doesn't. You have to take the calibration images and tell the software which is which. Most people build a "library" of bias, dark and flat images to apply to all their photos. Just make sure you have a decent number of them or you'll be adding more noise back into the mix.

Nice pic by the way. The data looks great though the processing seems a little harsh. The CLS filter is superb but it does block a lot of blue.

Cheers,
Cam

[Gvarouha]

I'm hoping to move to CCD soon with set point cooling. I'll look at a library at that point.

I agree the processing is saturated and over done. I got a little carried away and also wanted to see how far I could stretch the data. I'm in the middle of reprocessing now.