Jump to content


Ha Solar Scopes/Solar Filters

  • Please log in to reply
28 replies to this topic

#26 Eddgie


    Voyager 1

  • *****
  • Posts: 12675
  • Joined: 01 Feb 2006

Posted 11 October 2014 - 08:12 AM

Out of the box, I had to adjust the pre-load on the two speed focuser, but this is pretty much the same as with my SV 110ED, which appears to use the same focuser, though it has the ability to rotate, and the Lunt one does not.


Anyway, I have not had any issues with using the focuser with the binoviewer, but the Maxbright is super-light, and Ionly use a single pair of eyepeices (Vixen NPL Plossls) for 100% of my Ha observing.  I find that this magnification gives the best balance between full disk, prominances, and surface detail (the Lunt 60 can't really resolve detail in the penumbra of sunspots when tuned off band, so going higher does not bring out any new detail in these features). 

With the 15mm Plossls, I get about 50x I think?  Something like this.


Anyway, the focuser has not given me any problems but again, I did have to slightly tighten the preload on the two speed unit, but mostly that was when I was trying out Baader Zoom eyepecies (heavy.. Did not like using them in this scope.. Could not use winged eyeguards).


Remember, you have to use a GPC.  I am using a 1.25x GPC mounted in front of the BF-1200.   I did a post about 7 or 8 months ago on the binoviewer forum on how to do this.


You can also use a bigger GPC in the normal location of course, and there are other ways to get there, but for me, the Maxbright is dedicated to this scope, and part of the reason I like this configuration is because it does indeed reduce the load on the focuser by having it directly mounted the same way that it would mount to a T2 diagonal.


The BF-1200 is of course T2 already, so the Maxbright just screws on.  But you need one adapter to mount the GPC in front of the BF the way I did it.  PM me if you have any questions.

Edited by Eddgie, 11 October 2014 - 08:25 AM.

#27 City Kid

City Kid


  • *****
  • Posts: 2339
  • Joined: 06 May 2009
  • Loc: Northern Indiana

Posted 11 October 2014 - 08:45 AM

 I'm not going to spend hours staring at it, day after day.....

You might be surprised. I recently got a Lunt Ha filter for my refractor and I spend way more time observing the sun than I ever thought I would. In fact I'm getting ready to set up my stuff in about 30 minutes or so and I'll probably leave it set up the rest of the day taking peeks here and there throughout the day. One of the things that makes it so cool is the view is constantly changing. The view I have an hour from now will be different than the view later in the day. I can't hardly get my wife to spend 5 minutes at the eyepiece in my scopes at night but she will spend long periods of time looking at the sun in Ha.

#28 WebFoot


    Viking 1

  • *****
  • Posts: 754
  • Joined: 02 Jun 2005
  • Loc: Redmond, WA, USA

Posted 21 October 2014 - 10:53 AM

So, I've been grazing in the classifieds here and on Astromart, and what I think is best for me hasn't come up.  And the discount from new isn't compelling for what has come up.


While I (like most of us) have aperture fever, and would love an 80, 90 or 100mm system, I'm not willing to pay for it (and the Coronado appears to have a horrible focuser).  I'm willing to pay for a 60mm Lunt, with all the trimmings.  But I have some questions:


1.  Will a 60mm scope allow for decent photos, either with an SBIG ST-8XE, or with a DSLR (either full frame or APS-C; I have both)?

2.  Does pressure tuning make a significant difference?

3.  Does double stacking make a significant difference?





#29 bandazar


    Vostok 1

  • *****
  • Posts: 159
  • Joined: 19 Oct 2005

Posted Yesterday, 04:56 PM

Kind of surprised nobody has responded yet.

1.  can't answer that

2. In terms of detail no, in terms of seeing the whole entire sun without a sweet spot issue, yes.  If you're going to be doing astrophotography I'd go with pressure tuning, probably..

3.  Depends on way too many factors.  You can do a search on this group to find out though.  IMO, in small apertures it is generally not worth it.  But I know other people will disagree with me on this.  It just comes down to personal preference.  In large/medium apertures it might be worth it depending on what you like to see on the sun and how good a "fit" the double stack is to the original scope.

Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics