Another cloudless night and I decided to test the IDAS NB1 filter again This time on Crescent Nebula, located in constellation Cygnus. The nebulosity was captured well and it’s comparable to the narrowband image I captured a long time ago. However, the bright stars are surrounded by ugly reflections. I am not sure it’s due to the MaxField coma corrector or the filter. Next time I will try with ExploreScientific coma corrector and we will see.
|Telescope||Newton 254/1000 mm|
|Focal length||950 mm|
|Autoguiding||ZWO 174MM, TS 60/240 mm|
|Camera||ZWO 071 Pro @-5°C|
|Corrector||MaxField coma corrector|
|Filters||IDAS NB1 Nebula Filter
|Exposure||103x180s, Gain 95, bin 1x1,|