Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

Welcome to Stargazers Lounge

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customise your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

  • Announcements

    sgl_imaging_challenge_banner_jupiter.jpg

     

Stu

Moderators
  • Content count

    15,124
  • Joined

  • Last visited

Community Reputation

12,038 Excellent

About Stu

  • Rank
    Hyper Giant
  • Birthday 05/12/69

Profile Information

  • Gender
    Male
  • Location
    Surrey

Recent Profile Visitors

9,782 profile views
  1. Great point Gerry. How exactly do you go about finding that position, assuming the same rational applies to a Mak?
  2. Struggling to read that on my phone Shane, looks black on a black/dark background?
  3. Nice report Chris. Sounds like conditions were excellent for you. I was messing around with Binoviewers at low power last night, just checking if I could reach focus but when I had a look at Jupiter it did look very steady.
  4. Very nice Pete, some interesting activity going on today. Looks like your seeing was up and down like mine!
  5. Nicely done Dave. Seeing was pretty variable here, average at best really but still got some reasonable views which your images confirm. Great to see some activity at last!
  6. Interesting article. Wonder if @jetstream has seen this at all? Aurora photographers find new night sky lights and call them Steve http://www.bbc.co.uk/news/world-us-canada-39686055
  7. Sloemoe, can you repost this link? 'bet you didn't even take the time to read the article I linked, oh well'
  8. SloMoe, I really don't know what you are getting het up about. I have simply said, from experience, that you can use eyepieces with a larger field stop than the baffle tube diameter of your scope and that your eye is not particularly sensitive to this vignetting. My experience was backed up by a number of members who had experimented in the same way and found similar results. I did not ask for any advice in this thread, I posted some of my experiences. Lastly l, please don't worry about the blank post. One of the joys of being a moderator is being able to see the full edit history of any post........
  9. Slomoe, I only generally comment on things I have tried. I was surprised that the vignetting on the 30mm eyepiece was not noticeable in my Mak, which is why I posted a thread on it. The general consensus backed up my experience, and confirmed that your eye is not so sensiitive to vignetting within certain limits. Ultimately it is for each person to make up their mind what is acceptable and what is not. That is what I suggested buying used, and starting at the 20mm to reduce any risk of being caught out.
  10. Good stuff. Perhaps start at 20mm 100 Degree and work up. If you buy used you have little risk if you decide to sell on.
  11. This is where I think SkySafari excels because it is dynamic. You can choose your field of view, plus the magnitude of stars and galaxies that you are seeing and away you go. I galaxy hopped down Markarian's chain, plus a large number of other galaxies using my 16" and SkySafari/Nexus Push to and it was so amazing being able to clearly identify what I was looking at.
  12. Your eye is just not that sensitive to vignetting so in my experience you will be fine. I will dig out a post I made a little while ago and link to it here.
  13. I've found that you can exceed the baffle tube size in terms of eyepiece size without vignetting becoming immediately obvious. Eyes are not that sensitive to it (unlike cameras) so you can bend the rules to some extent. I forget the exact number, but the 30mm 82 degree ES field stop will be in the order of 40mm and it did not show noticeable vignetting. With the 40mm TMB it was there but not horrible.
  14. 'Tother way I should think Jules, the 2" diagonal will have a longer light path so moving the mirror forward will shorten it up to compensate. In terms of eyepieces, I used a 30mm 82 degree quite happily in my OMC140 (5.5" Mak), and even a 40mm 68 degree with a small amount of vignetting.