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new scope 75mm f15

Started by MER , Mar 25 2021 09:05 PM

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9 replies to this topic

#1 MER

Vostok 1

topic starter

Posts: 187
Joined: 09 Nov 2020
Loc: Central, Ohio

Posted 25 March 2021 - 09:05 PM

Seems this scope has a markers mark that might be uncommon. Vintage 1960 It is a Sears model 6339 75mm The mark looks a lot like Royal Astro mark but with half of it not there

In a thread here on "The Comprehensive List of Japanese Symbols"

There it is identified as "And the Tasco Royal prior to changing to TOWA"

So, my question how does this OTA rank (optics wise) against the other circle marks. Near the near top or the bottom.

Many thanks

Edited by MER, 25 March 2021 - 09:07 PM.

photiost, astro140, Terra Nova and 1 other like this

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#2 CharlieB

Fly Me to the Moon

Posts: 5,599
Joined: 11 Dec 2007
Loc: Southern NH

Posted 25 March 2021 - 09:06 PM

Should be a superb scope.

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#3 Garyth64

Fly Me to the Moon

Posts: 6,485
Joined: 07 May 2015
Loc: SE Michigan

Posted 25 March 2021 - 09:30 PM

It has the RAO mark. The RAO lenses are excellent.

Can you show more pictures of the scope?

GreyDay likes this

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#4 Terra Nova

ISS

Posts: 27,275
Joined: 29 May 2012
Loc: 39.07°N, 229m AMSL, USA

Posted 25 March 2021 - 09:33 PM

You got a great scope there. Enjoy!

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#5 MER

Vostok 1

topic starter

Posts: 187
Joined: 09 Nov 2020
Loc: Central, Ohio

Posted 25 March 2021 - 10:33 PM

It has the RAO mark. The RAO lenses are excellent.

Can you show more pictures of the scope?

I would be happy to over the week end. A this point I do not have a mount for it or at least a vintage mount. I am looking for one. Thanks

Bomber Bob and GreyDay like this

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#6 apfever

Fly Me to the Moon

Posts: 6,957
Joined: 13 May 2008
Loc: Colorado

Posted 25 March 2021 - 11:10 PM

The symbol is a lighter stamping that didn't get the full die imprint. It is a normal RAO identifier that represents well above normal optical consistency and quality.

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#7 GreyDay

Viking 1

Posts: 604
Joined: 28 Nov 2013
Loc: Southport UK

Posted 26 March 2021 - 10:01 AM

So jealous! 3" R.A.O's just never come up for sale this side of the pond. great find

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#8 JIMZ7

Vanguard

Posts: 2,325
Joined: 22 Oct 2005
Loc: NE flight path of DTW

Posted 27 March 2021 - 06:48 PM

Had a Edmund Scientific mid 60s...75mm

F/15 equatorial refractor. The white scope was flocked black inside completely. Came that way. Images were superb. Rumors were the objective lens was Nikon. Don't remember seeing any CA on Venus or Vega?

Jim

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#9 rweisberg

Explorer 1

Posts: 94
Joined: 30 Dec 2009
Loc: Gold Canyon, Arizona

Posted 18 June 2022 - 09:21 AM

I got the same scope a month ago. The 6339 is RAO and has amazing optics. Looked this morning at Saturn and the moon. Amazing views for a 75mm, and view of the moon is the best I have seen with no CA. My serial number is 570080 (#80 made) and like yours, the makers mark is only about half there, but looks just like yours. It is a beautiful scope and one of my favorites. I also have the 90mm Sears RAO 6345. But it is heavy and more work to move out of my office into the yard. The 6339 is so much easier to set up.