Altair 250mm f/5.3 RC
Camera: ZWO ASI 1600MM Pro
Mount: iOptron CEM 120EC
Filters: Baader 35mn Ha
Exposure: 411 x 1min Lights. Dark subtract and flat fielded.
By Nick Tonkin
M13. 90x300s or 12.5 hours total exposure to get those fainter stars at the periphery. Taken in 2022, using a Celestron 9.25 SCT, QHY268C and an Optolong L-Pro filter. by Dean Ashton