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About Merlin66

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  • Interests
    Spectroscopy, Solar observing,- and my wife!
  • Location
    St Leonards, Vic, Australia
  1. I was using a FULL spectrum modded 1000D. I’ll find the image.....
  2. Chris, Notwithstanding I found the prism easily pick Ha emission, I have some images, I’ll upload later.
  3. Rodd, interesting..... I use the ASI 174 and the ASI 1600 for solar imaging. Obviously the solar disk is magnitudes (!) brighter than your stars.... Your results would indicate that the contrast with the ASI 1600 should be compromised due the micro lenses. If, so I've never seen or been aware of it.
  4. Chris, Not exactly the same, but I have manged to record down to 3700A with a ATiK314L+ with the slit spectroscope. Without a UV cut it really depends on the optics and camera response. I'm interested to hear about your objective prism....I have a 20 deg f2 prism which can be mounted in front of my ED80.... early results with a FULL modded DSLR were very promising ( especially in the NIR) Ken
  5. Changing over to groups.IO now attract a ransom fee of $110/ year, they say this is the cost of procrastination.....change over prior to April 2019 would have been free......
  6. Yeah, a real bumma!! Google.groups doesn't look to well itself.... no recent updates and doesn't seem to accept transfer of data from an existing Yahoo group.
  7. Lots of features of Yahoo groups will cease on the 21st October 2019 including deleting attachments, message digests etc, etc. See https://in.help.yahoo.com/kb/SLN3101...pressions=true What are the options available to support a similar group?? I'm already aware of groups.IO (but at an annual cost to the owner of $110)
  8. Possibly not the best solution..... but I’ve use a C11 at f10 for spectroscopy mounted on a NEQ6PRO for the past ten years, no issues no drama.
  9. Nigella, I'd recommend Andrew's Tutorial ( see p 36) https://britastro.org/sites/default/files/BAA_BASS_Tutorial_0.pdf I usually crop the profile from say 3800 to 7000A, to make things easier. (The Astronomical spectroscopy website has recently been updated - worth checking out.... http://www.astronomicalspectroscopy.com/ )
  10. All the manufactures of the four element Petzval designed scopes (WO, Tak and TV) have put it in writing that their scopes are 100% safe to use with a Herschel wedge.
  11. Ok, but could the top plate be removed and redrilled/ modified to give more Az adjustment......
  12. I ‘ve been using TeamViewer for the past ten years between the laptop in the observatory and the office PC. what else can I say....works well for me, no issues, no drama.
  13. RonL, He states but doesn’t explain. As mentioned above the FOV brightness will diminish due to the higher magnifcation being achieved - for the same eyepiece used without the barlow. You would see the same effect using an eyepiece with half the focal length without the Barlow.
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