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Hino Optical Company 80mm f/15 Refractor - Monolux

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#1 Preston Smith

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Posted 24 September 2010 - 10:05 PM

Hi Folks!

Our good friend Bill Hunt is quite a noble gent and is opening his house to a relative in need. But as many of us know, that means clearing out the guest room (aka) the telescope storage area so some of his scopes had to go. I responded to the call and now have less room in my former garage.

When I first looked at this old Monolux there were a couple of things that stood out different from most other scopes. Finally, I took a second look at the focuser label and realized it wasn't a Towa, Astro Optical or APL. It was was a H.O.C. Hino Optical Company. My first one! :jump:

Caveman has one. Here's the link to his earlier thread:

Caveman's HOC refractor

My newly acquired scope is pretty much the same as his. Except mine bears the Monolux name and I don't have the japanese writing under the finderscope - just numbers.

Well here's some pictures!

First the 4 foot long box makes it's initial entry into the living room!

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#2 Preston Smith

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Posted 24 September 2010 - 10:08 PM

Let's see what's in the box!

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#3 Preston Smith

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Posted 24 September 2010 - 10:11 PM

OK, Everyone wants to see the assembled scope, so here it is:

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#4 Preston Smith

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Posted 24 September 2010 - 10:14 PM

Sorry Caveman! No Japanese writings. Just the #7 on the OTA and the #62 on the finder base.

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#5 Preston Smith

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Posted 24 September 2010 - 10:16 PM

Same heavy lens cell but with the Monolux moniker

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#6 Preston Smith

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Posted 24 September 2010 - 10:19 PM

In fact, the Monolux moniker is on EVERYTHING!

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#7 Preston Smith

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Posted 24 September 2010 - 10:22 PM

And of course, the focuser label!

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#8 Preston Smith

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Posted 24 September 2010 - 10:24 PM

That's enough for now - gotta go to the store to get milk...

More to report on later. :jump:

#9 Datapanic

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Posted 24 September 2010 - 10:27 PM

Link to the Hino/Mizar Catalog: http://geogdata.csun...ar/MizarUSA.pdf

#10 albert1

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Posted 24 September 2010 - 10:45 PM

Very nice Preston. Looks in super condition too.

#11 Preston Smith

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Posted 25 September 2010 - 10:26 PM

Well, sky conditions were less than ideal but I did manage to get the Hino/Monolux out onto my driveway. Jupiter looked great - as you would expect from this scope. No transits or GRS tonight but plenty of bands beside the NEB. Very good contrast despite the nearly full moon. The planet and the four Galilean moons looked spherical - I love how long focus achromats seem to bring out more of a 3D image. Sky conditions kept me from going over 150X.

Then off to Altair for a star test. Airy disk, rings are concentric and evenly bright in and out of focus, and no comma. This is a very good thing as this scope does not have the adjustable objective cell like the 76mm Astro Optical scopes have so re-alignment would have to be done with shims - not my favorite pasttime.

I noticed a trace of CA during out-focus but experience has taught me that this is mostly due to the poor transparency tonight. So I will have to retest when conditions are better. Still, no problems with CA when at or near focus.

Then off to the moon. A lot of "boiling" tonight but I was very pleased with the sharpness and contrast along the terminator - especially at higher powers.

What I really like about this scope is that the focuser has a single tube that accepts a 1.25" visual back adapter and the tube is far more rigid the the two tube focuser found on the Tasco 10TE. This difference makes the OTA tube on the Monolux a lot longer than the Tasco. Harder to store but far more accuate with no slop from a second tube that is held in place by felt (Tasco).

Well, time to put the scope away - clouds have rolled in.

#12 Doug76

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Posted 25 September 2010 - 10:37 PM

Excellent acquisition sir!

#13 sgorton99

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Posted 25 September 2010 - 10:41 PM

Very nice!

#14 strdst

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Posted 25 September 2010 - 10:49 PM

Hi Preston,

I have an Atco 60 X 910 (HOC) scope and a Mizar (Hino Optical) 60 X 900 which both have awesome optics. I can only imagine how great this new 80 mm scope is. Now if we could just do something about that boiling atmosphere ...

I also really appreciate not having those ridiculously long, strange and wiggly draw tubes potentially affecting the collimation.

other keith






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