View Full Version here: : Binoviewers & H-alpha solar telescopes?
13-06-2012, 01:44 PM
I was wondering if there are any H-a scopes that people are using that they know for a fact work with binoviewers (specifically, preferably, the WO type).
Different people say it can't work, or that they've heard it can but haven't actually tried it themselves, so I was hoping to tap into the direct experience of someone here who might have successfully achieved this.
13-06-2012, 03:04 PM
There is a model of Seibert binoviewer with specific OCS made especially to work with the PST - there is a fair bit of amplification though .
My plan is to get hold of another PST a make a true binocular with it- which will be the only way to use it at a relatively low magnification for a satisfyingly bright image. Howie Glator makes a bino platform for mounting two PST's on.
To use an Ha scope at unity magnification takes a larger blocking filter and lots of back focus. The best view I've ever seen of the Sun in Ha was with a Lunt Ha scope with large blocking filter and a Baader maxbright binoviewer. This was a $5000 rig but the view left you weak at the knees !
13-06-2012, 04:17 PM
I used my WO binoviewer with a 60mm Lunt to watch the transit of Venus & got great views. The WO binos come with a small screw-on barlow which slips into the eyepiece holder. I have a BF1200 blocking filter attached to the lunt & move it in & out till I find rough focus then use the fine focus knob. You do lose some brightness as the light coming through the scope is split. The sweet spot for the sun thru the lunt is around 13mm so I bought two 25mm Vixen LVs for the binos. I also bought a pair of eyeshields for the EPs to block out stray daylight. Sirius Optics sell the Field Optics Birding Eyeshields. It's so much easier to watch the sun with two eyes!
13-06-2012, 11:00 PM
Thanks for your responses. Food for thought there.
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