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Merlin66

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Everything posted by Merlin66

  1. Next to the magnifying glass Icon (top middle) "Position " icon click and then enter the RA/ Dec you want. Click apply. Then right click on the chart centre, telescope/ slew to cursor position. Works for me.
  2. OK, looking at John’s image it would be appear that the mounting socket is threaded into the base casting. It looks like the clutch assembly is not holding the base securely enough for the adaptor to be unscrewed... Is it possible to confirm this by looking into the “gap” between the mount and the adaptor while trying to unscrew the adaptor to see if the “base” is turning with it. If so, then the design seems to rely on the clutch assembly to hold the base solidly enough to release the adaptor screw. Bumma!
  3. An interesting problem. Just to be sure....the adaptor you show is screwed into the base of the mount. Does the base of the mount rotate during normal usage on this screw/ adaptor or is it fixed. Assuming it is fixed, you say rotating the adaptor, holding the base of the mount secure that the adaptor still stays attached to the base but can rotate. This infers to me: The socket in the base of the mount which screws onto the screw, is loose relative to the mount base. This socket should obviously not allow the adaptor to rotate without the screw tightening or loosening. I don’t know how this socket fits within the base, other examples I’ve seen have the threaded socket machined into the sold base of the mount. I your case it could be a threaded insert in the base which has come loose. You’d need to be able to access this socket from inside the base and at least hold it firmly enough to release the screw, then look at ways and means of re-securing it solidly to the base. This sounds like a manufacturing/ design fault. Have you contacted the supplier?
  4. James, I think it will depend on the effective open aperture close to the image plane. Baffles, focuser size, filter size can all cause vignetting and reduce the fully illuminated circle.
  5. I’ve been using an ADM dual saddle on the HEQ5 for the best part of ten years, no issues. I ended up fitting a GEOPTIC equivalent on the NEQ6PRO, no issues. when I upgraded my older TV Systems mount, I went for an ADM dual saddle. They are very well designed and well built. I would recommend either.
  6. Just a side comment....... The Baader Hyperion x2.25 barlow is a very useful piece of kit. The T thread connections allow it to be used with almost any camera. I use it for solar imaging (I also have and use the TV x2.5 PM ) I'd be interested to hear how it performs against the other Baader x2.25 barlow https://www.baader-planetarium.com/en/baader-q-barlow-2.25x--1.3x.html or the VIP barlow https://www.baader-planetarium.com/en/accessories/optical-accessories/barlow-lenses-coma-and-glaspathcorrectors/vip-2x-modular-barlow-lens-visual-and-photographic.html
  7. Valerio, The spectrograph is designed to use the blazed 1st order spectrum. (The angle of rotation for the 2nd order is twice as great....just use the bright 1st order.) If you want a higher resolution use a grating with more l/mm.
  8. Yeah, not all filters fit everything! As mentioned there's no real standard.......
  9. Valerio, I wouldn't worry too much about the "halo" - I have seen similar when high gain and very bright light sources are used. Will not impact on the usual target objects. (You should also flip your spectrum to bring the blue edge over to the left hand side. This is how all spectra are subsequently measured and calibrated. I've slant corrected and calibrated your spectrum using BASS Project. resolution, R=319)
  10. You could always plate solve your image to confirm......
  11. Valerio, On first glance that's how it appears, but it is only chrome coated on one surface. This surface is where the slit gaps are etched through the coating. This should face as Paul says towards the inside of the spectroscope. If you look carefully you'll see the difference. Ken
  12. The EQMod control screen shows how...just click unpark and click the star icon to get sidereal tracking.
  13. Peter, I use the SW/ Orion electronic motor on all my solar imaging ED80's. I drive the 10:1 focuser knob with a XML timing belt - gives very fine control.
  14. You may be interested to know that back in 1992 the very first digital spectroheliograph was conceived and built by Philippe Rousselle using a single line scanner (2048 x 1 array, 14 micron pixels) - almost identical to yours. He used an ATARI 1040 computer to interface and control the array.
  15. Interesting. I have a spreadsheet which may be of interest to others considering a SHG. SimSpec SHG.xls
  16. H-K, Thanks for the correction! I found FireCapture V2.6 has a setting for x2, x3, x4 binning. I just tried the Time lapse with both the ASI 1600 and the ASI 174 - worked for me.
  17. Barv, Which version of FireCapture? V2.7? I'd post your problem on the FireCapture group, Torsten is very supportive and I'm sure can help. https://groups.io/g/firecapture/topics I did see a message that some Mac users are having issues with the ASI 462..... (I use FC with the ASI 174 and ASI 1600 - no issues)
  18. Michael, That's what they were like in the early 1900s. With the introduction of the webcam in the 1990s we were able to simplify the design and using digital scanning to assemble the solar image. The current digital spectroheliograph (SHG) is very capable, and the grating in the spectrograph section can be tuned to any central wavelength allow us to image in CaK, Mg, He, Na, H beta, H alpha etc etc. The software used to "reconstitute" the solar image has also improved over the years. Wah-Heung Yuen's "Spectra Line Merge" and John's "BASS Project" are among the freeware favourites. My recent book "Imaging Sunlight - Using a digital Spectroheliograph" covers the subject, and describes many current SHG's and how to make and use them.
  19. Well done! More info please..... (your focus looks good!)
  20. Dexter, Sorry mate, I disagree. There are many products today which are much better than those produced in the past. We have good quality product available today which we could only dream of when I started back in the 1960’s
  21. I have most of the available catalogues installed.... The "Lookup" Search function gives all the hits. Let me know if you need more help.
  22. I use Firecapture/ AS3!/ Imppg/ PIPP for solar imaging with the ASI 174 and ASI 1600. The only program I've found that does CMOS software binning is PIPP. Run the initial SER video through PIPP with the binning settings required (2x2, 3x3, 4x4) and save the output as a SER file. This can then be imported to AS3! etc for subsequent processing.
  23. First day without cloud or gale force winds for a while..... Not much in the way of surface activity..faint small filaments. One pretty large and interesting prom down in the south west. (I'm happy that I also managed to pick it up in CaK)
  24. Fabio has released his latest update to Astroart. His continued support of the amateur community is appreciated. Hello everybody, a new minor version of Astroart is available: http://www.msb-astroart.com/ Version 7.0 SP5 - September 3, 2020 ------------------------------- * New feature. Full-frame autoguide for spectrographs. * New feature. Several options for active optics. * New feature. Airmass can be saved in the FITS header. * New feature. Option for "software binning" 2x2 for all cameras. * Improved. Star atlas icons are arranged on three rows when needed. * Improved. Script commands for selected points. * Improved. Script commands for rectangles and masks. * Bug fix. Script command PasteText did not work. * Bug fix. GIF animations did not loop in browsers. * Bug fix. Star atlas showed a wrong telescope position if JNow enabled. * Bug fix. Full-frame autoguide on multiple stars failed if bad polar alignment. * Bug fix. Option "Copy missing borders" did not work with rotated images. * Bug fix. Windows of telescope and focuser misplaced if multiple monitors. The multi-star autoguide is now available for "guiding on slit", for spectrographs. About the AOs, there are new features
  25. Vlaiv, I'll try to get a scan of the E&V pages for you. My interest is solar images (Ha, CaK and white light) we normally use Firecapture to record a SER video of up to 2000 frames. The focal ratio used is roughly based on the Nyquist but tempered by local seeing conditions. AS3! is used to "quality sort" and select say the "best" 30% of the frames (lucky imaging) which are then stacked as a 16bit TIFF file. Subsequent processing (Registax6 or ImPPG) to tweak the image using wavelets/ L-R convolution. I can't see, at the moment, how to include the CMOS software binning in our workflow. I have some raw SER files, which I can look at in PIPP......... (Measuring a recent image, taken in H alpha, with the SM60DS/ ED80/ x1.65 barlow (efr = 12.4) gave 0.79 arcsec/ pixel on the ASI 1600MM (3.8 micron pixel))
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