NGC 6946 - Filter B

Seeing (arcsec)	Airmass 1.0	Airmass 1.5	Airmass 2.0
0.6	3*180s	3*180s	3*240s
1.0	3*180s	3*180s	3*240s
1.5	3*180s	3*180s	3*240s
2.0	3*240s	3*240s	3*300s