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Coulter CT-100 4.5", I call it my "laptop" scope

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#1 Littlegreenman

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Posted 25 April 2007 - 04:18 PM

I just acquired this as part of a deal. I haven't take it out yet, but the seller told me he often used it hand-held or sitting on his lap. Focusing is by sliding your eyepiece in-and-and then tightening down. Maybe I should look for a Moonlight focuser! :roflmao:

It collapses into two the upper and lower halves which fit in a small leather case. The bar betwixt (betwixt :question:) the two sections is stored on the stap! Neat.
(The pic shows considerable foreshortening, the two sections are about same size.)

Littlegreenman

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#2 Littlegreenman

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Posted 25 April 2007 - 04:21 PM

and another to follow. I wish I had a Panoptic 24 to try with it!

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#3 Littlegreenman

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Posted 25 April 2007 - 04:25 PM

Here's an action shot.

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#4 Littlegreenman

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Posted 25 April 2007 - 04:28 PM

I said it was small! It's about 7.5" x 7.5 x 5.25".

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#5 BHunt

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Posted 25 April 2007 - 04:42 PM

Thats a interesting looking scope never seen one of those before.
Bill

#6 Bob W6PU

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Posted 25 April 2007 - 04:50 PM

That's amazing, I wasn't aware that Coulter made such a design!

A friend of mine has an early 80s, red sonotube 13.1" Coulter which has a really excellent mirror.

It's a shame that the original company is no longer in business producing these fine old Dob. Newts!

Bob
10" F/5 Treckerscope, circa 1956

#7 trainsktg

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Posted 25 April 2007 - 05:36 PM

If I remember right, one sold on eBay over a year ago for a surprising amount of money. Its a cute scope that was decades ahead of its time i.e. it meets airline carry-on requirementrs.

Keith

#8 Littlegreenman

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Posted 26 April 2007 - 12:34 AM

I checked it out first with a Televue 15mm Panoptic, then a Televue 25mm Plossl. Not seen well in the pictures is the connecting rod. It is a dovetail with thumbscrews that thread through the dovetail and can hold each section in place. In the center of each section is a short threaded hole that the thumbscrews can thread into...but. The focus point with the eyepieces I had required that the sections be further apart by a few inches than aligning the dovetail thumbscrews into the threaded holes on each section. Fortunately, the assemblage holds together with the thumbscrews aligned outside the hole, just using pressure to clamp it tight.

I didn't have high expectation for this little unit, given the fast design. But, during a quick check out it was pretty good. I was holding by hand, kind of like one would hold a tuba. If mounted, I'm sure I could give a better description of the visual capabilities. Maybe soon.

About 5 of these show up on the Astromart Classifieds going back to 2001. I'm guessing that this may only represent 3 or 4 different scopes. Asking prices range from $90 for one missing the dovetail bar to $500. The others were $295, $350, & $375. One had a helical focuser, which would probably be a nice upgrade. Any focuser would!

I may turn this into double duty as a finderscope!

Littlegreenman

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#9 Da Bear

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Posted 26 April 2007 - 09:22 AM

A very definite 10 on the coolness scale.

The Swiss Army had a folding scope like this during the '50's, and it still remains hugely collectable (rare) by the militeria folks.

Da Bear

#10 Littlegreenman

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Posted 26 April 2007 - 02:52 PM

I decided to put it up for sale. It will be on the swap and shop forum first.

#11 Glassthrower

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Posted 26 April 2007 - 05:08 PM

Hi Steve,

That's a very cool little Coulter. I have seen one of these before somewhere on the web, it may have been your's. I bet if the optics were cleaned and the scope was properly mounted, it should be a good performer.

It would make an interesting Micro-Truss-Dob!

Regards and clear skies,

MikeG

#12 Littlegreenman

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Posted 26 April 2007 - 10:29 PM

A better focuser, heck any focuser would be a nice addition!

Other than that it's a nice little scope.

Steven...un, Littlegreenman

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