Jump to content

sgl_imaging_challenge_2021_annual.thumb.jpg.3fc34f695a81b16210333189a3162ac7.jpg

Recommended Posts

Hello, your barlow goes between the diagonal and the eyepiece you intend on using, when you want to use your barlow on any particular eyepiece just remove the eyepiece from the diagonal and in its place put in the barlow then the eyepiece in the barlow.

voila!

Link to post
Share on other sites
6 hours ago, Claggy said:

Hi I have a Meade sct and I’m a complete novice and was wonder where to install my 2x Barlow lens. Thanks in advance for help

Others above have described how to use the Barlow. Just be aware that (depending on the quality of the Barlow and your lenses) you may not get as good a view as you might expect due to the extra glass you add to the setup - especially at higher magnifications (and therefore likelier dimmer image). That’s my experience with Barlows anyway - I don’t use one. Hope that helps. ?

Link to post
Share on other sites

And for higher magnification, you can put it ahead of your diagonal assuming your don't have a reducer/corrector installed at the back of your SCT.  Some newer SCTs have built-in correctors (like the EdgeHD series), so be careful to check what's inside your visual back and/or baffle tube.

Speaking of reducer/correctors, remove them before adding a barlow.  It's self-defeating to reduce by 0.6x and then increase by 2x to 3x.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By DiZZyViZiON
      Hi. Complete newbie to the hobby here. Just purchased a Meade Lightbridge 130 for my daughter as an upgrade to her Skywatcher Infinity 76. I'd like for her to see the rings of Saturn sometime with her new scope. Would getting a better lens improve her chances of a good view of the rings of Saturn? And if so, what lens would you recommend. Thank you
    • By Corpze
      Hi, i have made a video where i show a coople of eyepieces that i use and like, and also show how a barlow works, compared to the "Powermate" from Televue. And how is the FOV affected when changing the magnification with different eyepieces?

      Feel free to comment and give me feedback - I hope you like the video!
      /Daniel
       
       
    • By Zermelo
      I picked up a Celestron Omni last year quite cheaply and had originally been using that with stock eyepieces, which was fine.
      Since then I've bought a couple of BST Starguiders and a Hyperflex zoom, and I'm now wondering if I'd notice any difference with a better barlow (this is now being used on an F/5 150mm Newtonian). Otherwise, the pennies can be directed elsewhere.
      I'd not considered it before as the next rung up seemed to be around the £90-£100 mark, which seemed out of line with the rest of the spend. But I've seen some positive reviews of 3-element models in the region of £35-£40.
      In particular, I've read good things about the Revelation/GSO Astro 2.5x (though apparently closer to 2.2x) and the Baader Classic Q 2.25x.
      - does anyone have experience with both of these, and have a preference?
      - would I notice any significant difference with either, compared with the Omni?
      - I read somewhere that the Baader in particular required focussing the tube into the OTA to an extent that caused some image degradation. Obviously I'd want to avoid this if true, so is this a feature of the Baader, or of both, or of all (shorter?) barlows? (to be honest, I'd not thought to see whether this was happening with the Omni, I'll try to remember to check, if this weather ever breaks).
      Thanks in advance.
    • By kaslonpro
      I am excited to join this big star gazing community! I realize I am abusing of your kindness, so that you in advance for any help you can give.
      I have an old telescope, what appears to be a Meade ETX 90 from the early 2000s. I cleaned it pretty well after many Youtube videos and online research. I found full blown spider webs and dead spiders!
      I have encountered a few of issues as I'm putting it back together and I wonder if anyone might be able to help.
      1. I took off the screws of the back of my OTA (I know I shouldn't have!) and now I'm not sure how to put them back on (see attachments). When I try it seems to push the primary mirror instead of fastening to anything. 
      2. My secondary mirror flip is broken, the plastic piece part fell off. Is it possible to fix? The mirror itself is also very dirty (see attachments) and I don't think it can be cleaned further. Any tips on how to replace it and where to buy the parts? Or is it possible to not use the 90 eye piece viewport and instead use the front one so I don't need to fix the flip or the mirror?
      4. My secondary baffle is sliding off. I've read that this is a problem w/older models. I tried pushing it to the right place and it requires some force, but after 1 minute it slides back to its original place. What should I do? Does this matter?
      5. The plastic attachment to hold the smaller lens (finderscope?) wobbles no matter how tightly I screw it on. I don't know if it has anything to do with the front plastic part being a little broken.
      Thank you for your help in advance, and I am still learning terminology so be easy on me
       
       






    • By LondonSi72
      Hi SGL,
      My lovely wife bought me a SW Explorer 130 with the basic RA drive for my 40th birthday 8 years ago, and I've enjoyed using it on and off ever since.  I've started getting more into it - it's a great beginner scope, but I'm - like lots of others on this forum - looking at upgrading.  One of the things I found tricky with the scope was getting the focus just right at high magnification (I'm sure that's kind of obvious!).  It does wobble quite a bit on the EQ2 mount when focusing.  I get pretty good - if small - views of Jupiter, Saturn, (the Moon, of course) and have had hints of seeing some DSOs.
      I bought a 8mm BST Starguider, and it's a great improvement on the standard 10mm that comes with the scope, but if I push the scope by adding the 2x Barlow and the 8mm it's a blur and the focus seems to keep missing the sweet spot.  I saw a post elsewhere on this forum by MakTheNight, (looks like they've left now - last post was 2 years ago) who added a Baader Helical Focuser that attached directly to the T-thread on the focusing apparatus on the SW. Link to that post is below. I got one and it is indeed a great improvement on fine tuning - the problem is I can't use it with the Barlow as the helical focuser is about an inch long and the focuser can't move far enough into the scope to focus with the Barlow and any of my eyepieces (the 8mm BST, or the 10 or 25mm standard eyepieces)
      .
      Clearly MakTheNight managed to get their setup to work with some specific eyepieces (a Luminos 10mm and 32mm Plossl) and a specific Barlow, so I tried looking up how I could work out what combination of eyepieces and Barlow would work, rather than randomly buying kit and having to return it because it won't work with my scope, but I haven't found anything useful yet.  So I thought I'd take the plunge and ask here

      Can anyone help me figure out how I can calculate what combinations of eyepiece and Barlow would work with this setup?  I'm also looking at upgrading the OTA and mount to a 200P and EQ5 at some point, so ideally would have a combination that could work with that too - the focal length and mirror is quite different - 1000mm on the 200P parabolic vs 900mm spherical on the 130.
       
      Many thanks!
      Simon
       
       
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.