Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

  • Announcements

    sgl_imaging_challenge_banner_nb_dso.jpg.eb6cd158659331fd13e71470af6da381.jpg

alan4908

Advanced Members
  • Content count

    642
  • Joined

  • Last visited

Community Reputation

877 Excellent

2 Followers

About alan4908

  • Rank
    Proto Star

Contact Methods

  • Yahoo
    alanmarsh4908@yahoo.com

Profile Information

  • Gender
    Male
  • Interests
    Astrophotography ! ....at the moment I'm concentrating on deep space imaging
  • Location
    East Sussex
  1. Cresent Nebula (NGC6888)

    Thanks - yes, I also like this - it is a bit like the Crescent has been wrapped in blue bubble wrap ! Alan
  2. Wizard Nebula

    From the album Deep Sky III

    A bi-colour (HOO) image of the Wizard Nebula. 13.5hours integration time.
  3. Deep Sky III

    Images taken with a Trius 814 and a Esprit 150
  4. Cresent Nebula (NGC6888)

    Thanks for the comment. In answer to your question: the image is bicolour with Ha mapped to RED and OIII mapped to Green and Blue. No Lum data was used. Since my narrowband filters have only a very small bandpass (3nm), they let through only a limited amount of light compared to wider bandwidth filters, this helps control the apparent star size. I've also found that the filters tend to highlight contrast which is particular good for some targets. Alan
  5. Wizard Nebula

    Thanks Graem -yes, it is interesting the types of colours that you can obtain in narrowband processing. Having tried virtually all combinations (), I finally settled on the scheme shown which I have to admit was partially driven by the resultant star colours, which I quite like. Thanks for the comment Chris. Alan
  6. Wizard Nebula

    Thanks Sara - my choice of colour scheme was primarily driven by my desire to make the image appear "natural" looking. I do like the star colours that also result. Alan
  7. Wizard Nebula

    Thanks ! Thanks, yes, I think most of the detail came from the Ha which was very strong in comparison to the OIII. Thanks for the comment Rodd. I think any softness is likely to come from the processing rather than the focusing. The OIII signal was quite weak and hence I needed to apply quite a bit of noise suppression to this part of the image. However, I found that I could recover sharpness by applying the strong Ha signal as a Lum layer. Thanks jazza
  8. Wizard Nebula

    To further improve my narrowband processing skills, I thought I could do with some more practice, so here's my attempt at the Wizard nebula. The image represents 13.5 hours integration time and was taken with my Esprit 150. Comments and criticism appreciated ! Alan LIGHTS: 16 Ha, 11 OIII x 1800s. DARKS: 30, FLATS:40, BIAS:100 all at -20C.
  9. Lunar V and X (reprocessed)

    Thanks Tim - glad you liked it
  10. Lunar

    Lunar images taken with my Trius 814 and SW 80ED DS Pro or Esprit 150
  11. Lunar V and X (reprocessed)

    From the album Lunar

    A reprocess of the data from 1st June 2017 to highlight the V and X optical effects, colour and crater detail.
  12. Lunar V and X (reprocessed)

    Thanks John. Yes on the intense comment- I attempted to increase the colour and sharpening for maximum impact without introducing processing artifacts. Alan
  13. Lunar V and X (reprocessed)

    Thanks Neil Alan
  14. Lunar V and X (reprocessed)

    A reprocess of an image that I acquired on 1st June 2017 which was taken with my Esprit 150 and SX Trius 814 at prime focus. Although it was unplanned, I later discovered that I had also captured the so called X and V effects. I've attempted to boost the visibility of the V and X, along with the crater details and colours. The background sky level has also been raised. Again, I decided to process the image using my normal DSO processing routine. I'd appreciate any comments and criticism. Alan
  15. Cresent Nebula (NGC6888)

    Thanks Tim !. It was taken with my Starlight Xpress Trius 814. Alan
×