Comparatif Halos

Focal Length = 980 mm. TEC 140

With Field Flattner TEC and Ring STL by TEC

Raw picture : 600 sec in bining 2x2

Picture took with red filter Coating Run #2101-08386/08401

Raw picture : 600 sec in bining 2x2

Picture took with Green filter Coating Run #2101-08394/08402

Raw picture : 600 sec in bining 2x2

Picture took with Blue filter Coating Run #2101-08399/08418

  Without Field Flattner TEC

Raw picture : 600 sec in bining 2x2

Picture took with Blue filter Coating Run #2101-08399/08418

Raw picture : 600 sec in bining 2x2

Picture took with Green filter Coating Run #2101-08394/08402

Raw picture : 600 sec in bining 2x2

Picture took with red filter Coating Run #2101-08386/08401

With Field Flattner TEC and Astrophysics Ring ADA 671

Raw picture : 600 sec in bining 2x2

Picture took with Blue filter Coating Run #2101-08399/08418

Raw picture : 600 sec in bining 1x1

Picture took without filter