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Posts Made By: Jim Miller

November 7, 2004 05:59 PM Forum: Binoviewers

New Siebert binos?

Posted By Jim Miller

There's a link on Harry Siebert's site for "Handcrafted"
1.25 inch binoviewers, no glass traveled through, 24mm
CA (I think), 50-80% brighter at the eyepieces than
comparable binos (comparable in size and pathlength, I
believe it said)

It said these units were going to be shipped to testers
by late July. Is there any more info on them? They sound

And, how does on get to be a tester for this sort of thing?
Trying out new astro equipment would be my dream come true.
grin smile 8) wink

P.S. Harry, I know you're active here, so I hope you'll have
some info to give.

November 21, 2004 02:11 PM Forum: Binoviewers

Homemade Binoviewer

Posted By Jim Miller

I have the opportunity to get my hands on a Nikon stereo
microscope head for essentially free, and I'd like to try
converting it to a binoviewer for my scope.

However, I've not been able to turn up anything on the net
about this. Does anyone here know of any resources online,
or have any advice or instructions? I know it can't be as
simple as putting a nosepiece on it, and adding 1.25"
eyepiece holders.

Any help is appreiated.

(P.S., I know that this will probably not turn out to be
as good as what I can get commercially, but it sounds like
a neat project I'd like to try)

November 30, 2004 06:26 PM Forum: Binoviewers

Is the forum down?

Posted By Jim Miller

No new posts in 36 hours. It all came to a screeching

December 13, 2004 06:27 PM Forum: Binoviewers

Nikon Microscope head arrived

Posted By Jim Miller

Any advice/help for converting this to a binoviewer would
be greatly appreciated.

See the attached pic to see it.

December 18, 2004 05:51 AM Forum: Binoviewers

Eyepiece holder ideas needed...

Posted By Jim Miller

Rather than machining 1.25" eyepiece holders from scratch,
since my dad's schedule is kind of full these days, I
thought I might save him some time, and template cut the
eyepiece end of a couple of cheap 1.25" diagonals. Does
this sound reasonable?

Any other ideas or experiences would be greatly appreciated.

To sum up, my plan is to attach a 2" to 1.25" eyepiece
adapter to the one end of the bino head, since it's outer
diameter pretty closely matches the outer diameter of the
ring on the bino. Then, I'll remove the existing eyepiece
holders, and use their bases as a template to cut the
eyepiece tube from a matched pair of 1.25" diagonals. Drill
holes to match the bino body holes, and screw them on in place.

The 2-1.25" adapter on one end will give me an already black
annodized input, with threads for 2" filters. I like this
idea, but the eyepiece holders I'm less sure of.

March 16, 2005 06:10 PM Forum: Binoviewers

Eyepiece confusion

Posted By Jim Miller

Celestron Nexstar11GPS f/10 SCT, with a homemade binoviewer,
to be almost exclusively used for planetary observing. I'm
torn between getting a couple of 15mm OWL superwides, or
spending more for a pair of 18mm UO HD orthos. FOV is not an
issue. I've never looked through either. (I've only looked
through a 25mm UO abbe once before, through a sidewalk
astronomer's 8" Meade SCT - at Jupiter. Even under
Baltimore's light polluted skies, it was nice!

My only concern is the added magnification introduced by the
binoviewer adding path length may be a bit much for the 15.
I might have to actually go with the 20s. (My Radian 14mm
is about the limit of how high I can go most nights in

March 23, 2005 08:41 AM Forum: Eyepieces

Apogee orthos

Posted By Jim Miller

Anyone tried Apogee's line of orthos? They're on clearance
right now, and they claim full multicoatings on all air to
glass surfaces. Isn't that the only improvement to the UO]
HDs over their standard abbe ortho? (i.e. same design, but
now FMC on all surfaces. The older orthos are only coated
on the outside surfaces)

I'm thinking of a pair for a binoviewer for planetary
viewing, but I've never heard anyone speak of them.

April 19, 2005 04:37 PM Forum: Binoviewers

Tonight's the big night!

Posted By Jim Miller

I'm finally finished the home built binoviewer. (Many
thanks to my Dad, who is a machinist, and did the
machine work for me.)

My Nexstar11GPS is outside right now acclimating. Once it
gets dark, the big test begins. I'll be trying it on
Jupiter, Saturn and the Moon.

Attached is a pic of it with a pair of 20mm GSO Superviews.
(BTW, I tried these in mono last night. I'm pretty
impressed, especially for the price ($50 shipped for the
pair here on Astromart - Thanks Mark!)

Wish me luck that I did it right, and it works! I'll post
later tonight or tomorrow with results.

May 2, 2005 05:27 PM Forum: Binoviewers

DIY bino question-Roland, Harry, etc...

Posted By Jim Miller

I'm contnuing work on my homemade bino, and now
that I know it works (i.e. images merge, focus
together, etc...), I want to tweak it for best

Is it recommended that I blacken the edges of
the prisms? Or, if I line the inside of the unit
with the darkest black velvet, will that be good
enough? Or just leave it as is?

What about cleaning the prism surfaces? I've already
cleaned them with a Nikon lens pen. Good enough?

Any other advice, from anyone, would be appreciated.

November 23, 2005 03:55 PM Forum: Binoviewers

New generic binoviewer on the market

Posted By Jim Miller

Saw it on Ebay, from Owl Services. It's the same unit
as all the others, with FC Bak-4 prisms. It also comes with
TWO OCAs, two eyepieces w/ bolt cases, and aluminum case
and a carry bag.

Downside? Well, the ad never said anything about individual
focusing, and there's only one setscrew per holder in the

They also don't mention CA. Might be the older 18mm.