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Please can I have some expert advice on the following image:

post-26268-0-77686300-1408636703_thumb.j

Canon 1100D (modded) , ED80 with 0.85 focal reducer, Astronomik CLS filter.

24 x 8 min lights, 20 darks and 20 flats. Processed in Deep Sky Stacker and Photoshop.

Gradual application of levels and curves, attempts to increase hue, saturation and some use of "Actions" to bring out DSO itself. I really am struggling with colour balance since getting my camera modified. :-(

Can't wait to go and stay with Olly and have some lessons in processing!

1. Why can I not bring out any colour in the nebulosity?

2. Why is there a red/brown hue across everything?

3. What should I do differently next time in either capturing or processing?

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the thing with the iris nebula is that its has a huge amount of faint "dark dust" around it which requires several hours worth of data to produce anything decent. theres not much colour in the actual nebula apart from the nice blue in the middle, so having a modded camera really doesn't do anything here. you never stated what iso setting you was using but I would stick to 300 sec subs with iso 800 to try and keep the sensor from heating up to much creating less noise. did you leave a gap in between subs to let the sensor go back to ambient temp?

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the thing with the iris nebula is that its has a huge amount of faint "dark dust" around it which requires several hours worth of data to produce anything decent. theres not much colour in the actual nebula apart from the nice blue in the middle, so having a modded camera really doesn't do anything here. you never stated what iso setting you was using but I would stick to 300 sec subs with iso 800 to try and keep the sensor from heating up to much creating less noise. did you leave a gap in between subs to let the sensor go back to ambient temp?

Thanks Daniel. I used ISO800. Left a gap of 30 seconds. More subs may well be the key!

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