Hi Guys,

Thank you very much for your comments on my NGC-891 image.

About the artifacts, I don't know. My guiding was Great. on another image, I
don't have this case. Strange !!!!!!

Thanks again

Best Regards,

Florent

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CCD ALTAZ & AO web site : http://www.astrosurf.com/ccdaltazao

Pithiviers le Vieil/Jouy-En-Pithiverais-----------------FRANCE

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Losmandy HGM TITAN / Gemini Goto mount
Meade 12" UHTC SCT OTA
William Optics FLT-110 & Megrez 80 II Triplet APO OTAs
SBIG ST-10XME/CFW-8A/AO-7