Sand Island Observatory

Millers Ferry, Alabama

Calibration Data

Orion 80mm x 400mm f/5.0 CT80 Refractor
Model Adapter FOV Focus Notes
SBIG ST-i Monochrome (2) 1.25″ Extensions 41′ x 23′ ?? 3.82 arcsec/pixel
Orion All-In-One Color (2) 1.25″ Extensions 48′ x 36′ ?? 1.93 arcsec/pixel
ZWO ASI 290mm Mini (2) 1.25″ Extensions 48′ x 28′ ?? 1.50 arcsec/pixel
Esprit 120mm x 840mm f/7.0 ED Triplet APO Refractor
Model Adapter FOV Focus Notes
Cannon Rebel T3 Pyxis LE, (1) Field Flatener 90′ x 60′ ?? 1.28 arcsec/pixel
Nightscape 8300C Pyxis LE, (1) 2″ Extension 79′ x 55′ 67.0 1.33 arcsec/pixel
QSI 683 Pyxis LE, (1) 2″ Extension 79′ x 55′ ?? 1.33 arcsec/pixel
Sony A7S: 4654:3520 3.8um Pyxis LE, (1) 2″ Extension 146′ x 98′ ?? 2.06 arcsec/pixel
ZWO ASI 1600 Pyxis LE, (1) 2″ Extension 73′ x 78′ ?? 0.93 arcsec/pixel
Tele Vue Nagler 31mm 2″ Diagonal 182′ ?? Magnification 27.1
Baader Hyperion 17mm 2″ Diagonal 83′ ?? Magnification 49.4
Tele Vue Nagler 12mm 2″ Diagonal 70′ ?? Magnification 70.0
Tele Vue Nagler 9mm 2″ Diagonal 53′ ?? Magnification 93.3
Orion Rectile 12.5mm 2″ Diagonal 62′ ?? Magnification 67.2
Celestron 280mm x 2800mm f/10.0 EdgeHD 11″ SCT
Model Adapter FOV Focus Notes
Cannon Rebel T3 Pyxis LE, (1) Field Flatener 27′ x 18′ ?? 1.28 arcsec/pixel
Nightscape 8300C Pyxis LE, (1) 2″ Extension 22′ x 17′ 67.0 1.33 arcsec/pixel
QSI 683 Pyxis LE, (1) 2″ Extension 22′ x 17′ ?? 1.33 arcsec/pixel
Sony A7S: 4654:3520 3.8um Pyxis LE, (1) 2″ Extension 44′ x 29′ ?? 2.06 arcsec/pixel
ZWO ASI 1600 Pyxis LE, (1) 2″ Extension 22′ x 16′ ?? 0.93 arcsec/pixel
Tele Vue Nagler 31mm 2″ Diagonal 55′ ?? Magnification 90.3
Baader Hyperion 17mm 2″ Diagonal 25′ ?? Magnification 164.7
Tele Vue Nagler 12mm 2″ Diagonal 21′ ?? Magnification 233.3
Tele Vue Nagler 9mm 2″ Diagonal 16′ ?? Magnification 311.1
Orion Rectile 12.5mm 2″ Diagonal 19′ ?? Magnification 224.0