Résultant d'essais du canon F200 2.8...

2011Aug04
Canon F200mm f2.8
Front filter LPS-P1
Canon 40Da (IR Cut removed)
Astrotrac, no guiding

Maxim DL:
Stack of:
6x240s @f2.8, 7 darks, 21 flat, taken from an other session (2011Jul28), SD-Mask
12x240s @f4.0, 7 darks, 21 flat, taken from an other session (2011Jul28), SD-Mask
18x240s @f5.6, 7 darks, 21 flat, taken from the captures taken at f4.0 during an other session (2011Jul28), SD-Mask

From all above stacks: Stack by SUM

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Slight denoising under neatimage

Alexandre