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Geoff Barnes

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Posts posted by Geoff Barnes

  1. Just setting up again at 8.30pm as the sun is setting. A balmy 25 degrees and clear as a bell, something rather pleasant about observing in t-shirt and shorts!

    I'm determined to get my first ever view of Uranus tonight, narrow window of opportunity before it goes behind the trees following the crescent moon, but should get half an hour on it and will give it up to 300x and see what I can see. :)

    ------------------------------------------------------

    Edit: Did I see Uranus? Not sure to be honest, sky was still too bright at first and then got called in for dinner and by the time I got back out I could see a dim object but not really blue or green and then behind the trees it went.

    Hmm, will have to try again from a better position to see it later when the sky is darker.

    Consoled myself with a good look at 45 Tuc, surely the best globular cluster bar none. :) 

    • Like 2
  2. Hi @Marvin Jenkins I'm always on here having a look but haven't had the scope out for about 3 months what with summer light and of course a lot of smoke in the air from the fires. Much cleaner air now after lots of welcome rain recently and the viewing last night was as good as I've ever had from home.

    Astro advice for down here? Good grief, where to begin! Some of the truly great heavenly sights await you with highlights such as the Carina and Tarantula Nebulas, Omega Centauri and 37 Tucanae Globular Clusters, Crux the Southern Cross with its Jewel Box Cluster.

    Tassie is a wonderful place to visit, still full of remote and unspoilt wilderness areas where dark skies abound.

    Have fun! :) 

     

    • Like 1
  3.  

    Aaah, so good to be back in the game again!

    It's summer here of course so not fully dark until late, but signs now of the evenings starting to draw in and dark by 9pm at which time our old friend Orion is clearing the tree tops .

    Just an hour or so under the stars in perfect warm, still conditions, even Sirius wasn't twinkling at all.

    No point messing around, within the first 10 minutes I had bagged Sirius Pup, Rigel B, and Orion Trapezium E and F.

    Had a bit of fun splitting a few doubles and spotting a few globular clusters as well, the highlight being the 37 Cluster which was really showing well.

    Could have stayed out much longer but alas work beckons in the morning but at least my viewing sessions are under way again at last. :) 

    • Like 5
  4. I did a fair bit of research of filters for plantary viewing and read lots of reviews.

    I think it was after reading our fountain of knowledge @Stu's positive reviews that I plumped for the Baader Neodymium filter last year. The difference it made on Jupiter was very subtle to be honest, a marginal intensification of the equatorial and tropical bands, but it imparted no noticable false colour at all which pleased me.

    As a result, what I do now is leave it permanently on my Baader 8-24mm zoom  and use it just as you would use a UV filter permanently on a camera lens as much for protection as much as improved viewing  It seems to impart no colour cast on any subjects, be they planetary or deep space.

    • Like 1
  5. I'm pretty certain that it is the low altitude and poor seeing conditions that are causing the problems for all you poor folk up north.

    I wouldn't say it was easy, but I rarely failed to spot the pup whenever I tried last year with my 12 inch Dob, with Sirius being quite high in the sky down here. Apart from the glare of Sirius I found the diffraction spikes to be my main obstacle to overcome.

    • Like 3
  6. There's not been an awful lot of interesting things to see lately in my limited northerly view here, which is just as well, given we've been shrouded in terrible smoke from the bushfires in eastern Victoria.

    You look out the window and you'd be forgiven for thinking it is just thick mist and fog, but as soon as you step outside the smell of the smoke really hits you.

    At least we're getting good rains now and the forecast is for a major rain event early next week so fingers crossed things should improve dramatically soon, and Orion is gradually moving into prime position too! :) 

    • Like 1
  7. Agree @F15Rules  I'm one of the lucky ones and have avoided taking the long and expensive route.

    I don't have very deep pockets and have tended to buy the cheaper, well regarded eyepieces such as my SW Planteary 4mm and 5mm. They have been absolute bargains and have reassuringly held their own against my Vixen SLV 4mm, ES 4.7mm and my TV 3-6mm zoom, both of which I bought purely to compare with my SW's.

    My favorites are my Baader Morpheus 6.5mm and Hyperion 8-24mm zoom which I find so comfortable to use, and I won't consider spending more than the  Morpheus range again.

    I will sell my ES, TV and Vixen Ep's to recoup some funds, the Morpheus 4.5mm is the only one now that I really covet. :)

    • Like 4
  8. @bluesilver The Lumicon filters are mainly available from the USA suppliers, but many don't ship to Australia.

    You could try https://www.astroshop.eu/ as an alternative, they ship worldwide.

    16 hours ago, John said:

    I have a couple of less expensive UHC filters as well as the Lumicon O-III - a Meade 4000 Nebular (spelt like that !) in 1.25 inches and the Explore Scientific UHC in 2 inches. Both do make a difference and have quite generous band pass widths so the effect is much more subtle than the O-III. Most of the time though I'm wanting the filter to give a good "kick" to the contrast of the nebulosity and the O-III is by far the best for that.

    This illustration of the impact of a high quality O-III filter is not an exaggeration on a darkish night:

    image.png.aa6f27abcd3dd4631c9c9a6d6e82236f.png

     

    Alas, good though it is, my Astronomik 0lll filter shows the Veil fainter than your image on the left @John

    Too low on our light polluted horizon from here - very frustrating.

    • Sad 1
  9. 9 hours ago, blinky said:

    Right,cleaned primary and put it back in, 2hrs later how does this look? All 3 clips visible, shadow of secondary is round and the centre spot is centered

    I'd be happy with that.

    That's how mine looks and then I just finalise with a defocused star test to confirm and everything looks nice and sharp.

  10. I completely agree with the above, once I got my secondary mirror set perfectly with my Cheshire and locked it into place, I now only use a star test to finalise my collimation each time I set up as I know the secondary is right. It almost always needs a slight tweak of the primary screws each time to get that set perfectly, but it is a one or two minute job at most and away I go with everything looking sharp.  I check the secondary with the Cheshire maybe a couple of times a year but it rarely needs adjusting again. :) 

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