Images from the forest of Dean.
M8 and M20.
The sky conditions were good on this particular evening with stars visible down to magnitude 5.5. I was using a Vixen DX mount, with a 4 inch f/6.3 refractor, an Atik 383L mono CCD camera and a set of Asttronomik narrowband filters.
I captured 60 second sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image with the camera set on X2 bin mode.
The total exposure time was 20 minutes using a H Alpha filter, 5 minutes using an O111 filter and 4 minutes using a blue filter.
Click on an image to get a closer view
Lagoon nebula
Unsharp masked
M8 M20 mosaic
M8 M20 narrowband mosaic
M20
