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




Advanced Members
  • Content count

  • Joined

  • Last visited

Community Reputation

723 Excellent

About Merlin66

  • Rank
    Bright Giant
  • Birthday December 9

Contact Methods

  • Website URL
  • Yahoo

Profile Information

  • Gender
  • Interests
    Spectroscopy, Solar observing,- and my wife!
  • Location
    St Leonards, Vic, Australia
  1. Vlad, Check out the SimSpec and TransSpec design spreadsheets available on the website: http://www.astronomicalspectroscopy.com/ I think you're trying to over complicate things........
  2. Piero, with SCT and Mak systems you need to consider the effects of the internal baffles and their positions. This can limit the the FOV obtainable with these scopes.
  3. DS imaging at very slow F ratios.

    90% of all the Astro imaging done in the 1970's and later were done by amateurs using f10 SCT's. with hypered film etc the results, at the time were far beyond any previously obtainable. Times, and equipment changes...... Fast systems are great for extended nebula, slow systems excel for stars.
  4. Astropixelprocessor or Astroart6

    +1 for AstroArt. It handles all my cameras, acquisition, guiding and meets all my processing needs.
  5. OK I should be able to access my computer later today. I'll verify all the settings I use in Eqmod, CDC and ASPS. can you confirm that the camera you are using definitely provides a workable image under your ASCOM settings. If you can upload an example I can run it through the process.
  6. M13 with planetary camera

    Hmmmm the FWHM doesn't change with exposure.
  7. The newer EU standard only applies to non optical viewing i.e. Naked eye.
  8. Amateurs-involvement in Solar Research????

    Using a spectroheliograph which many solar observers are now using, we can observe the sun in any wavelength and carry out Zeeman effect measurements as well as other magnetic movements. It's difficult to define what solar investigations are required by the professionals. we continue to gather data.....
  9. Hmmm, not with my computer at the moment, but a couple of things come to mind. you can give the file and location anything you want. unpark the mount to allow for re-syncing. Tick the ignore option to minimize any conflict and double check the focal length and pixel size. it should then work IF the camera with the same ASCOM settings shows a reasonable working image with the selected exposure I.e. Enough star images to be identified. try the camera independently first.......
  10. the stability of the wedge

    The Meade HD wedge, stripped and rebuilt ( filing and smoothing the joints, better stainless screws etc ) mounted on a cut down Meade HD tripod in an observatory worked very well with my LX200 12" I used it successfully for spectroscopy for a few years.
  11. Hmmmm which camera and scope were you using to obtain the reference images?? were you obtaining sufficient star images for identification? what error messages (if any) do you see???
  12. Beware of fake eclipse glasses!

    The ISO 12312 safety standard recently adopted for VISUAL filters (to further reduce the possible injury from UV light) means that some of the astronomical filters are no longer recognised as being "safe". Note, is ONLY applies to non-optical (naked eye) observations.
  13. Venus in UV 6.8.2017

    The UV transmission of the white glass SCT correctors isn't as bad as you may think. Bear in mind that the efficiency of the CCD cameras drops dramatically below 400nm also. I have successfully recorded the spectrum of Sirius down to 365nm with both my C11 and the ol' Genesis.
  14. Where do get custom size optical blanks cut?

    Peter, agreed.... but when just cutting circular blanks it's not as important. We used to mount the blank (with a dab of pitch) on a spare piece of glass. This allowed the cutter to finish below the rear of the blank giving a good (but slightly tapered) edge. We made around 50-60 blanks for the local astro society.....