Messier 57 in narrowband
Narrowband SII-Ha-OIII with 4x5min subs, no flats, no bias.
The first almost dark night since early April was lit up with a full moon and occasional Perseids. The mount head attachment to the pier was altered (still not perfect) and a good deal of the short darkness was spent polar aligning the mount. After reaching a reasonable accuracy I still had about an hour of tolerable darkness for narrowband work, so M57 was chosen as the start of season target.
Messier 57 in narrowband
Narrowband SII-Ha-OIII with 4x5min subs, no flats, no bias.
The first almost dark night since early April was lit up with a full moon and occasional Perseids. The mount head attachment to the pier was altered (still not perfect) and a good deal of the short darkness was spent polar aligning the mount. After reaching a reasonable accuracy I still had about an hour of tolerable darkness for narrowband work, so M57 was chosen as the start of season target.