48
49
Telescope Focal Length Angular Field of View Image Scale of the Moon Image Scale of M42
1000mm 83.3’ X 54.4’
1250mm 66.6’ X 43.5’
1800mm 46.3’ X 30.2’
2032mm 41’ X 26.8’
2540mm 32.8’ X 21.4’
2800mm 29.7’ X 19.4’