IC396 - Elephant Trunk nebula

Elephant Trunk (IC1396)
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Stacking mode: Intersection
Alignment method: Automatic
Stacking step 1 ->313 frames (Gain: 200) - total exposure: 52 mn 10 s
RGB Channels Background Calibration: No
Per Channel Background Calibration: No
Method: Median Kappa-Sigma (Kappa = 2.00, Iterations = 5)
-> No Offset -> Dark: 1 frames (Gain : 200) exposure: 10 s
-> No Flat
Stacking step 2 ->948 frames (Gain: 200) - total exposure: 2 hr 38 mn 0 s
RGB Channels Background Calibration: No
Per Channel Background Calibration: No
Method: Median Kappa-Sigma (Kappa = 2.00, Iterations = 5)
-> No Offset -> Dark: 1 frames (Gain : 200) exposure: 10 s
-> No Flat
Stacking step 3 ->702 frames (Gain: 200) - total exposure: 1 hr 57 mn 0 s
RGB Channels Background Calibration: No
Per Channel Background Calibration: No
Method: Median Kappa-Sigma (Kappa = 2.00, Iterations = 5)
-> No Offset -> Dark: 1 frames (Gain : 200) exposure: 10 s
-> No Flat
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Mirror X
Crop (x=22, y=20, w=1973, h=1466)
Background neutralization
Asinh Transformation: (stretch=1000.0, bp=0.00200)
Histogram Transf. (mid=0.155, lo=0.130, hi=1.000)