Entries by liyun

Mehmet Ergün

Photographer: Mehmet Ergün Title: M31 Andromeda Galaxy Image Data: Equipment: Nikon D850 (CentralDS) ASA Astrograph 12″ Hutech IDAS D1 Baader 7NM H-Alpha ALT 7 Mount EXIF: 20 x 3min RGB 6 x 5min H-Alpha Software: PI, PS, LR

Alessandro Cipolat Bares

Photographer: Alessandro Cipolat Bares Title: M31 Andromeda Galaxy Image Data: Camera : CentralDS Astro 60D Cooled. Telescope: FSQ85 Site: Aosta Valley, Italy

Monochrome A7s CMOS Sensitivity Test

Debayered A7s CMOS Gold wirings on 4 sides of sensor ares was covered by epoxy to protect from chemical solution. CMOS sensor is  having several defected points in debayering process. And these made Horizontal rows and vertical columns in image.   Test condition: Astro A7s camera 1 set. Low pass filter was removed, Hoya clear […]

Vincent Cheng

    Photographer: Vincent Cheng Title: Comet 46P/Wirtanen, M35 & ic433 Image Data: Camera : CentralDS Astro A7s (cooled at-3C) Telescope/Lens : SIGHTRON D=70mm f/5 Lanthan Apochromat Flat Field Astrograph (350mm f/5) Filter : Color:none, Ha:Optolong 7nm Ha 2″ ISO : Color:3200, Ha:6400 Tracking Mount : Takahashi EM-10 Autoguide : none Total Exposure Time : […]

Vincent Cheng

    Photographer: Vincent Cheng Title: Antares and Rho Ophiuchus Region Image Data: Camera : CentralDS Astro60D (cooled at-4.5C) Telescope/Lens : f/2 @ Sigma Art 105mm f/1.4 Filter : Optolong L-pro EOS-C clip-on ISO : 1600 Tracking Mount : Kenko Skymemo S Autoguide : none Total Exposure Time : 30s X 139 frames w Dark Frames, […]

Vincent Cheng

Photographer: Vincent ChengTitle: NGC7822Image Data:Date 31,OCT,2016Place Cingjing, TaiwanCamera : CentralDS Astro A7s (cooled at -1C)Telescope/Lens : f/4 @ Canon 300mm f/4L non-ISFilter : Optolong 2″new 7nm NEW Ha, SII, OIIIISO : 3200Tracking Mount : Kenko Skymemo SAutoguide : noneTotal Exposure Time : Ha:3mins X 23frames, SII:3mins X 22frames, OIII:3mins X 32frmaesw Dark Frames, Bias Framesprocess […]