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First ever 660 second exposures


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I've been playing with longer exposures lately, and have had a couple of fruitless nights. I am a lot smarter, and a bit confused.

Even just 4 frames looks a lot better than last year... Good to see progress! :-)

My learing so far. Please comment!

1) My canon 10D is fried after 660 seconds. Amp glow fills about 20% of the right hand side of the image.

2) It seems very important to pick a guide star close to the object. I think that is the cuase of problems I had with star trailing and "perfect" guiding in PHD at the same time? Anyone?

3) Even with good guiding, star shapes are not 100% in 11 minute exposures. Stacking does a good job of evening things out a bit.

I've updated my blog with more details

This is 4x11 minute subs with flats extracted. No darks (I've applied a brightness/contrast adjustment layer in CS3 for a "quick fix")

I have 2 more 11 minute frames and 7x11 minute darks waiting @ home to add to this.

Dimmer things are coming into reach... New enthusiasm is building up... :-)


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