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Horwig

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Horwig last won the day on October 16 2015

Horwig had the most liked content!

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About Horwig

  • Rank
    Sub Dwarf

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  • Location
    Caernarfon, Gwynedd
  1. Horwig

    Astrokev's ROR - The Build

    Following the above discussion, I was reminded of the mug a friend drinks tea from at work (hope it at least raises a smile):
  2. Horwig

    Electrical layout for ROR observatory

    I'll add my twopence worth. My dome is built next to a stone outbuilding/shed, so no trad warmroom. The consumer unit for both is in the shed, and has an RCD, it's fed from the house via SWA, a fused spur from the shed then feeds the dome. The data cable from the dome to the house is SWA cat 5. I used to run on ethernet over mains, but the adaptors used to blow if they were switched off, became damp, then powered back up. In the dome I have two Maplins linear 12V supplies, one 'dirty' supply does mount, dome and dew heaters, basically everything that would cause spikes, the other 'clean' supply is for USB hubs and cameras. Both supplies are in a warm cupboard in the dome, where the pc etc lives (and acts as a background heater). The mount/scope then has 2 heavy gauge 12v and an USB cables going to it. A Startech industrial 12volt powered USB hub lives on the scope. Lighting is provided by a pair of LED 20watt floods, they work, but they are far too directional. Mains sockets in the dome are external types to comply with safety regs, for some reason my mate who has done his sparking exams was happy that everything was ligit, even if the equipment fed from the sockets could become soaked if it rained whilst the roof was open... I'm not saying it's in any way a perfect solution, but it works. Huw
  3. Horwig

    A medium format lens on a Canon full frame

    Pentax 67 lenses are the way to go for widefield astro and mono camera because if the long back focus and the sharp optics, especially since we only use the centers, I have a selection that I use with a full frame astro CCD: 50mm f4: 300 mm f4 Huw
  4. Horwig

    Sitech tracking drift

    Patchy cloud here tonight, so can't get any sensible results to measure properly, but it looks like I'm running slow by about 3 seconds of arc per minute, so to correct I need to REDUCE my Ticks count do I? Huw
  5. Horwig

    Sitech tracking drift

    Now that is interesting. I've played with the ticks setting but not yet found the sweet spot, I hoped that there was something I'd done wrong as opposed to having to tweek the mount, more work needed. Huw
  6. Horwig

    Sitech tracking drift

    Now I'm getting to fine tune this self built Sitech controlled mount of mine, I've noticed that it's not tracking at true siderial rate. Ticks per revolution in RA have been checked and double checked, but it's tracking slow by about 0.3%. I've started a conversation on the Sitech yahoo group, but has anybody here seen anything similar? Guiding corrects for it, but it would be nice to get it right in the first place **EDIT** Sorry, was going to post in MOUNTS, mods, if you think it would be better there, would you move it, thanks. Huw
  7. Horwig

    JamesF's observatory build

    Oh come on, why so negative, 20 inch Newtonian maybe, nothing like another challenge. After this obsy nothing will seem impossible Huw
  8. Horwig

    My new Rapidor Manchester Donkey Saw.

    Wow, used to have a similar saw when I did metalwork in school many many many years ago
  9. Oh, me to, used to use them some time ago, just been on their site, not at all bad, and free postage over £30+vat, not bad at all.
  10. Hi , anybody recommend a good (cheap) electronics supplier that sells a wide range of components? (eg, semiconductors passives and hardware). I'm fed up trawling the bay, and of waiting for stuff I order to arrive in many different envelopes on many different days. I know I can go to CPC and get it all, but that comes at a price.
  11. Horwig

    Cat's Eye Nebula with Billy Harris.

    Now that is a good demo of Drizzle, must give it a go Huw
  12. Horwig

    Cat's Eye Nebula with Billy Harris.

    WOW And I'm not usually lost for words. Huw
  13. Hope you don't my my playing, and to be honest I've taken this too far, but this is what's lurking in the data, working from a jpeg doesn't show it well, but there's real data in the dust and gas surrounding the central nebula.
  14. Nice one, version 2 is very much an improvement. I've been played with it in PS, increasing the saturation and using curves to push it a bit more, there's still a lot more in there. Huw
  15. Question; does it still count as first light if it comes more than seven years after I started building the telescope? This is the first colour image (that I'm fairly happy with) taken with my 40cm f3.5 Newtonian. I've been doing a lot of work on the scope and mount in the last year, and things are finally coming together, so this is really a test of the system. Technical details: 40cm f3.5 scope on Sitech controlled fork mount. QSI 6120WSG camera with Astrodon filters and lodestar guider. Subs: 10x5minutes L, 5x5 minutes each RGB, processed in PI and PS. Technical excuses: for pixel peepers, if you look at the stars, they are not round, guiding was not good in RA, RMS was 0.94" but peak to peak was 4.1", and imaging at 0.4" per pixel it shows. Also this scope is FAST, 5 minute subs are probably a bit on the long side, star cores are quite bloated. Huw
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