Cygnus region
Just a quick trial of the canon macro 100/2.8-L, on the 5d mark II. 69*3min exposure@1600 iso. Bias, dark and flat corrections applied.
Conclusions:
a) very weak on the corners, but quite ok at the center.
b) strong coma-shaped reflection on the brightest stars.
-->Definitely not for an astro use in theses conditions :-)
Pre-treatment and treatment in Siril.
Location: Nord-Vaudois (CH)
Cygnus region
Just a quick trial of the canon macro 100/2.8-L, on the 5d mark II. 69*3min exposure@1600 iso. Bias, dark and flat corrections applied.
Conclusions:
a) very weak on the corners, but quite ok at the center.
b) strong coma-shaped reflection on the brightest stars.
-->Definitely not for an astro use in theses conditions :-)
Pre-treatment and treatment in Siril.
Location: Nord-Vaudois (CH)