NGC 6992, The Eastern Veil nebula

I took these images on three separate evenings capturing five minute sub frames with matching dark frames , combined with flat field frames to reduce the effect of vignetting in the final image .The total of exposure times for each filter was sixty minutes using SII, OIII and H-alpha filters . I used for the colour data SII for green , OIII for blue and H Alpha for the red . I also had light pollution and moonlight to contend with , on one evening stars was only visible down to magnitude four . The telescope I was using was my ten inch F4.8 reflector , a Vixen Atlux mount with P H D auto guiding . The total exposure time in the final combined image was nine hours .