SH2-308 Dolphin-head Nebula

by Yungshih Lee

Objects in field: LBN 1047, LBN 1052, Sh2-303, Sh2-308, 16 CMa), 16 omi01 CMa, PK233-10.1, The star Udra (ο1 CMa

Equipment: William Optics RedCat 91 WIFD, ZWO ASI2600MM Pro

Integration: 11h 5m

The image was taken with William Optics' new scope Cat 91 WIFD (448mm/f4.9). The scope is said to support medium-format cameras, so it's a bit overkill for me with my APS-C sensor. But the optic quality is amazing and the stars are extremely tight and small. HFR during acquisition never exceeds 1.9 and were often around 1.7. I tried to shoot RGB for stars in the image but clouds rolled in and…