NGC6960. On this particular evening stars were visible down to magnitude 4.7. The total exposure times were 40 minutes for each narrow band filter S11, O11 and HA . I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The telescope I was using was a 4 inch f/6.3 refractor, a Vixen Atlux mount, PHD auto guiding , a set of Astronomik narrowband filters and an Atik 383L mono CCD camera.
RGB
NGC1805 the Heart nebula. These images were taken under bright moon light with stars only visible down to magnitude 3.5. I was using a 4 inch f/6.3 refractor, a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik narrowband filters HA , S11 and O111 . I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The two images had total exposure times of 60 minutes using a H Alpha filter, 30 minutes using an O111 filter and 30 minutes using an S11 filter .
Combined images
