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omega3

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Everything posted by omega3

  1. There is an Energizer headband version, with white or red led light. The light is tiltable. Sells for around £10 upwards. Just saw Wilkinson doing an almost identical one for £3.99. Unfortunately I had already got one at over £10. Those wanting a red led headband, checkout Wilko. Alan
  2. I have the Skywatcher low profile focuser, and last night, initially I had difficulty getting focus with Canon 1000d + T ring + 1.25" fitting T-adapter. Then I noticed the T adapter was not sitting fully in. When in sat in a further approx half inch, I was able to focus. I just looked at my T adapter and it allows the T-ring to be very close to the focusser. I notice that other T adapters have a greater gap between the focuser and the T-ring. So it appears to me that to get focus with my 10" dob, without eyepieces, I need to get the camera as close to the focusser as possible. Hope that helps to solve your problem. I did managed to get pictures of the moon last night but it was not as sharp as some of the other efforts using other imaging techniques on this forum. Alan
  3. The moon was very clear tonight. The seeing must have been very good. I was able to use 5mm BST Explorer, barlowed (Orion Shorty plus) 10mm Celestron plossl, barlowed 8mm Hyperion zoom - all gave very clear views with . I was surprised at how good the view was with barlowed 10mm Celestron. Even barlowed 5mm was possible but imaged moved too quickly across field of view. However, should one be able to resolve the craterlets along the western limb of Hyginus rille? I was barely able to see the biggest of the craterlets. Alan
  4. Nice shots. I was out and it was the view I had tonight. Well done. Alan
  5. Thank you all for your helpful comments. Alan
  6. Last night was very cold. When I brought my scopes indoors, there was condensation on the refractor objective and the dob mirror. For the refractor, I left the cover off, and for the dob, I put the OTA horizontal with the cover off overnight. The eyepieces also had condensation. What is the best way to cope with this problem, for those who do not want to put their scopes in the garage? Alan
  7. If 240x is too much for the 10" dob on Jupiter, would it also be too much on the moon? Alan
  8. The Skyliner 10" has FL of 1200, so 5mm will give 240x, whilst the Celestron 102 has FL of 500, so that would be 100X. I think the dob is collimated, defocussed stars are perfectly circular. Looks like I will have to try it on many more nights to see if there are occassions when I can get sharp bright stars, to know the cause of the blurry Castor last night. Alan
  9. Hi, Last night, I tried using a 5mm BST Explorer with my F5 scopes. Jupiter was fairly low early in the evening and I was just able to make out one band. The image wasn't crisp, maybe the scopes were not sufficiently cooled, last evening was quite cold. When they were cooled I looked at Castor, though I could split the double the stars were fairly spread out. Are 5mm eyepieces generally too much for F5 scopes for our skies? Will I have more joy using them on the moon? Alan
  10. From the discussion, I presume the Triplet is difficult where there is light pollution. I tried last night with my 10" dob from my back garden with the lights of Slough in the same direction about 5 miles away. I presume the Triplet would be difficult from my location. I thought I saw one very small fuzzy patch when I agitated the scope. How dark must the site be in sky magnitude before one can easily see one or more of the galaxies with a 10" dob? Alan
  11. Hi, I wonder if the WO erecting diagonal for £40 from FLO would be a significant improvement over the stock diagonal that came with my Celestron wideview? Alan
  12. The TMB planetary eyepieces have 20mm eye relief, there are also other options that have adequate eye relief. Alan
  13. Hi, The Celestron 102 has FL 500mm, and its theoretical max magnification is around 200x, so would a 4mm eyepiece giving 125x magnification be as high I could go in south Bucks or could I in good seeing use a 3mm. Alan
  14. Hi, I have the Skywatcher dual speed low profile crayford focuser for my dob. The 2" to 1.25" adapter that comes with the focuser is not easy to use as it is very tight and difficult to insert and remove 1.25" eyepieces. I see on the astronomica site that they have low profile and long profile adaptors. What is the advantage of the long profile adaptor? Alan
  15. Thanks all, I think we notice the rattle when you pick up the eyepiece quickly. Once you notice it, one then shakes it. Now that it seems to be a common experience, I will not fret about it. Alan
  16. Hi, I have the Hyperion zoom MKII and been using it regularly for nearly a year. It has become more noticeable that there is a rattle when I shake it. Sounds like something is loose inside. Is this normal? I have not noticed any particular problems using it, except that when I compared the view with another eyepiece at the same focal length, the view is shifted to one side (can't remember if it is left or right). Alan
  17. Welldone! That's a lot of objects for one night. How many hours it all take? Which book or star map were you using to help with locating the objects? Were these the objects you planned to see before beginning the observing session? Alan
  18. Got myself 3 colour filters and a ND 96 filter for a bargain £16. Also got an Astronomy Now subscription, paid cash and did not get a proper receipt, so I hope the mags do turn up. Alan
  19. I am using my Celestron 102 on my Horizon 8115 tripod. I wonder if it would be much better to replace the tripod head with a ballhead with friction control eg Benro B0 or Phottix KB-0, both rated at 8kg capacity. The 102 would not be more than 3kg even with heavy eyepieces. The set up would allow one to reposition the telescope without unlocking and locking any locks or levers. Has anyone experience with such a set up? Alan
  20. Apparently, you do not need to lock it when in position as scope can be balanced and with adjusting the right amount of friction on the pan and tilt, it should stay in position wherever you point it. I have seen it in use with a bird watching scope, but just wondered how well it would work for visual astro. Thanks for the suggestion of the Manfrotto head, will look at that. Alan
  21. Hi, Just got the Celestron 102 wideview and using my Horizon 8115 as the mount. I am considering the Gitzo G2180 fluid head to replace the Horizon head. I understand that with the Gitzo head properly adjusted, you point to the object and the the scope will stay in position without need to lock pan and tilt. I wonder if anyone can share their experience using it for astronomy. The Gitzo is primarily used by bird watchers. Alan
  22. Yes Jupiter is a great sight. But I find that it is so bright through the 15x70 that there is some flaring and I don't see a clean disk. Do you have that problem. Alan
  23. Sorry, have not seen one of these mounts. Do you track by nudging them like you do with dobsonian mounts. Alan
  24. Sorry to join in the tread so late. I managed to find M81 and M82 following the instructions in Star Watch by Harrington. Going from Phecda to Dubhe, you pass an arc of stars, continue for the same distance again till you reach a triangle of stars (with apex towards Dubhe), and the galaxies are to the south east of the triangle of stars. There is another obvious triangle of stars nearby with the apex pointing away from Dubhe, but that's not the one you want. Alan
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