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About Ohmless

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    retired disabled osteopathic physician specialized in pain management.
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    Eastern Michigan

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  1. for years I had an f/10 achromat and used three eyepieces(at the most). I used a 25mm sterling plossl, a 12mm BST, and an 8mm BST when I stopped using that scope. I recently moved up to a 6" reflector and use a 5mm BST instead of the 8mm BST I used in the refractor. Three eyepieces is probably all you need.
  2. very nice. is it turned or did you buy cylinder?
  3. I have the 5mm BST and have used it for about half a year in my f/10 achromat. At the 200x that it produces, there is a ton of CA even with using a yellow #8. This is mainly from the scope and not the eyepiece. The CA gives it a soft focus. So not tack sharp but not trash either. Go with the radian if possible.
  4. I have the 12mm dual ED eyepiece and compared recently to an 11mm TV plossl. The plossl might have had an edge early on, but the oils from my eyelashes quickly spoiled the view. Therefore, if I plan on observing for longer than five minutes, the 12mm is superior. I have had this eyepiece for about a year now and haven't had to even touch the lens once. Great eye relief.
  5. It is good to have a variety of different focal lengths as images get blurry when the atmosphere doesn't cooperate. Baader classic ortho 10mm is another option for you. I am simply tickled by my 12mm and 8mm BST explorer eyepieces. The 12mm is great also for medium/high power deep sky also along with planetary/solar/lunar.
  6. I have it as an ebook and print out the pages I need for a specific night of observing. I agree that it is a great read overall. The only critical thing I can say about the book is that I wish the lunar maps were a bit more detailed.
  7. I wouldn't recommend a plossl below 12mm as they eye relief is too small. I get smudges on them and it ruins the eyepiece for the rest of the observing session. the sterling plossls are a great value. I love my 25mm one after owning it for over a year. Definitely better than a Meade or Celestron plossl. http://store.smartastronomy.com/stsepley12.html I also like the BST starguider/explorer eyepieces. I own and am delighted by the 5mm, 8mm and 12mm ones. They are very comfortable and have a wider field of view than a plossl. http://stores.ebay.com/Skys-the-Limit-Astro-and-Optical/BST-Sta
  8. if you prefer video: https://www.youtube.com/user/eyesontheskyDOTcom?feature=watch
  9. I agaree with above poster that mentioned that CA is more of a nuisance than a major flaw. I only have issues with CA at higher powers(under 1mm exit pupil) and when it might interfere with a double star that has a very bright primary. I use an inexpensive yellow #8 to reduce the CA to about half. Definitely worth experimenting with prior to spending nearly a 100$ on a minus violet filter. Or if someone wanted a stronger violet cut they could try a yellow #12
  10. IME with a cg4, I wouldn't go over a 4" refractor or a 6" f/5 reflector.
  11. I would go up a couple inches at least if you want a significantly better resolution and light increase
  12. I know the OP is in the UK, but for those living in the western hemisphere can get these less expensively by buying the Astro Tech Paradigm eyepieces. I love my 12mm!
  13. pay attention to the stellar appearing objects that are within 5 ring widths as they are often moons.
  14. patience and experience. It also helps to look through bigger scopes and at images as it makes it easier to see the details. I also recommend going to the BAA saturn project to learn the proper names for the features.
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