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Equipment Discussions >> Classic Telescopes

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: CharlieB]
      #5772553 - 04/02/13 10:37 AM Attachment (15 downloads)

Erecting prism - the only piece that has been broken.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: CharlieB]
      #5772554 - 04/02/13 10:38 AM Attachment (14 downloads)

Diagonal - bakelite and nice chrome.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: CharlieB]
      #5772555 - 04/02/13 10:39 AM Attachment (21 downloads)

The whole enchilada. There appears to be no provision for a safety chain, but it doesn't really need it.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: CharlieB]
      #5772561 - 04/02/13 10:43 AM Attachment (14 downloads)

Original instruction sheet. I would welcome any insight as to the manufacturer of this scope. I haven't found a similar scope in any of the available online catalogs. I don't think it's a Royal Astro product, as I have a 500 RA from around the same time (late 50's). I don't think Tasco imported scopes before 1955 as they started the business in 1954 importing fishing gear. So this scope probably dates between 1955 and 1958. The original owner had it as a boy and he was born in 1945.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: Rich (RLTYS)]
      #5772565 - 04/02/13 10:47 AM

Yes, it's very smooth and has the fine focus mechanism just like the Unitron 750. My 105 has the coarse focus tube pull out and the fine focuser stays connected to the tube.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: terraclarke]
      #5772576 - 04/02/13 10:50 AM Attachment (16 downloads)

Yes. 50/700. It's a later scope from the early 80's, I think. The finder doesn't swing like the older 50mm.

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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Very unusual Tasco 50/600 new [Re: CharlieB]
      #5772731 - 04/02/13 11:55 AM

I love small, well made scopes. They are so cool. You got a beauty there Charlie.

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gelkin
Pooh-Bah
*****

Reged: 09/22/10

Loc: Western, MD.
Re: Very unusual Tasco 50/600 new [Re: CharlieB]
      #5772919 - 04/02/13 01:13 PM

Very interesting little scope Charlie. Congrats on a wonderful buy.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco 50/600 new [Re: gelkin]
      #5772979 - 04/02/13 01:32 PM

Thanks. I hope I can find out more about it, but information is very thin.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re: Very unusual Tasco Terrastro 50/600 new [Re: CharlieB]
      #5784050 - 04/07/13 03:21 PM

Well, I had a chance to test our the optics of the Terrastro cemented doublet. With the rest of the scope so well made, one would expect a good objective, but this one was awful. No sharpness as all, regardless of which side was facing the sky. Couldn't even do a decent star test. Fortunately, I had a spare Tasco 50/600 objective that is very good, and the cell screwed right onto the tube. You have to wonder why so much attention was lavished on the scope mechanics and so little on the objective.

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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re:Very unusual Tasco Terrastro 50/600 new [Re: CharlieB]
      #6009498 - 08/06/13 01:31 PM

One last small chapter on this little Tasco. The objective had some major optical flaw and was worthless, so I decided to experiment with it just in case it had been cemented together incorrectly. I put it into a pot of water and heated it up slowly. After about ten minutes, I was able to slide the two elements apart. I cleaned off all the Canadian balsam with some alcohol and the flint & crown were clean as could be. I tried flipping the crown, but it was very obvious the surfaces didn't mate. I then tried the old rotating lens process and just stuck three very thin pieces of foil as spacers in lieu of glue. I stuck it back into its cell and screwed it back onto the tube. I was greeted with a sharp, contrasty image! I then rotated the two halves back into their original alignment and the image was even better. It had to have been the balsam that was causing the problem, or perhaps there was a bit of wedge between the glued halves. In any case, I am very happy with the end result. Has anyone else experienced this kind of problem before?

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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re:Very unusual Tasco Terrastro 50/600 new [Re: CharlieB]
      #6009581 - 08/06/13 02:19 PM

Great news Charlie. I'm glad it was a happy ending (and a happy beginning) for such a wonderful little scope.

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mikey cee
Postmaster
*****

Reged: 01/18/07

Loc: bellevue ne.
Re:Very unusual Tasco Terrastro 50/600 new [Re: terraclarke]
      #6009849 - 08/06/13 04:32 PM

Too bad the folks who put the instruction sheet together couldn't get it mounted properly for a photo. Oh well live and never learn. Mike

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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re:Very unusual Tasco Terrastro 50/600 new [Re: mikey cee]
      #6009881 - 08/06/13 04:47 PM

Quote:

Too bad the folks who put the instruction sheet together couldn't get it mounted properly for a photo. Oh well live and never learn. Mike




Same people must have assembled the objective as well.


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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re:Very unusual Tasco Terrastro 50/600 new [Re: terraclarke]
      #6009920 - 08/06/13 05:06 PM

That's actually the model designed for below-the-horizon viewing.

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strdst
Post Laureate
*****

Reged: 03/23/08

Loc: Oregon Territory
Re:Very unusual Tasco Terrastro 50/600 new [Re: CharlieB]
      #6041129 - 08/23/13 01:41 AM Attachment (6 downloads)

Hi Charlie,

Mine arrived yesterday (eBay high bid) With it came thunder and lightning, clouds and rain. Always a good sign!

Here she is with my recently stripped of bad coatings Swift 839 on a Tasco 7te-5 mount... clouds and rain, lightning and thunder...


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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re:Very unusual Tasco Terrastro 50/600 new [Re: strdst]
      #6041351 - 08/23/13 07:43 AM

Those a good looking pair of scopes you have there. That Terrastro sure is a solidly built scope, isn't it? And it packs up into as small, easily transportable case. Perfect grab & go. Let me know how the optics are. Was there any indication of the age of the scope?

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Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re:Very unusual Tasco Terrastro 50/600 new [Re: CharlieB]
      #6045427 - 08/25/13 03:47 PM

Nice find. This is a late 1950's, early 1960's Tasco scope. I think the maker is early Mizar, although they weren't called Mizar then. I had one similar to this several years back and it was built like a tank compared to later Tasco offerings. Optically it was very sharp. It's a keeper.

I later used mine as a piggyback guidescope on a larger 3" refractor. It served well and was eventually replaced by a 50mm early Asahi-Pentax refractor - one of the few small scopes of that period that could beat the little Tasco's optics.

Best regards and clear dark skies,

MikeG


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CharlieB
Carpal Tunnel
*****

Reged: 12/11/07

Loc: Southern NH
Re:Very unusual Tasco Terrastro 50/600 [Re: Glassthrower]
      #6045499 - 08/25/13 04:41 PM

Thanks for the great information. I thought it might be from around that vintage, but wasn't sure. Not only are they well built, but they are very portable in that little box. I would love to find one of the Asahi scopes (as well as a couple of other 50mm scopes).

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Glassthrower
Vendor - Galactic Stone & Ironworks
*****

Reged: 04/07/05

Loc: Oort Cloud 9
Re: Very unusual Tasco 50/600 new [Re: Rich (RLTYS)]
      #6053084 - 08/29/13 06:09 PM Attachment (5 downloads)

Hi Charlie,

Here are a couple of pics of my old Tasco of similar vintage.

I haven't looked at these in many years, so this will be a trip down memory lane. New relevant information might be revealed.

...

Ok, new info already. Scratch what I said about Mizar. I was completely wrong!

It was Towa, not Mizar that I was thinking of.


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