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Goto Hy-Score Model 451, 60mm-900mm f/15 Alt Az

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#1 Stew44

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Posted 04 August 2017 - 06:37 AM

Wanted to share with you this Lazlo offering from Goto.  I would call this a Model 201 in the Goto lineup, but it is obviously later than the 56-59 printed literature which show a much simpler Alt Az configuration for both the 1XX series and the 2XX series scopes.  It has the porro prism erector and a molded Goto logo on the side plate of the diagonal.  The fact that there are spacers between the lens elements and the f/15 ratio makes it a Fraunhaufer design IMHO.  It also has one of the convertible 10mm-20mm eyepieces with only a HM6mm added for fairly spartan range of magnification.  The mount is Unitron-esque, and Goto may have felt that this was a viable way to go in evolution (and maybe a Nihon Seiko patent had run out).  In any event there does appear to actually be a serial number here (391) besides the Laslo model number (451).  Note the tapered focuser tube with a short .965 draw tube with split friction eyepiece holder.  Looks like cost saving move to me.   Looking forward to getting it out under the stars.

 

P8040556.JPG

P8040557.JPG

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P8040559.JPG

P8040552.JPG

P8040555.JPG

 


Edited by Stew44, 04 August 2017 - 06:44 AM.

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#2 rolo

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Posted 04 August 2017 - 06:48 AM

 They certainly don't make em like that anymore. Quick release finder? Collimateable cell?



#3 Stew44

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Posted 04 August 2017 - 07:12 AM

The finder is quick release. grin.gif   The cell is not collimatible. frown.gif



#4 Chuck Hards

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Posted 04 August 2017 - 07:56 AM

Terrific find, Stew!  Can we get more pics in daylight?


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#5 leveye

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Posted 04 August 2017 - 08:53 AM

A classic beauty. Love the mount. Enjoy!



#6 Chuck Hards

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Posted 04 August 2017 - 10:06 AM

With foil spacers, it looks like the objective is a classic Fraunhofer, not the odd configuration of the 105 & 106.


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#7 Stew44

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Posted 04 August 2017 - 10:20 AM

I think we should call it what it is, a Cooke doublet, although a variation.  The 100 series scopes are all Cooke doublets.  The 200 series scopes are Fraunhaufers.  No doubt in my mind at all.


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#8 Bomber Bob

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Posted 04 August 2017 - 10:20 AM

Very Nice!  I remember this one eBay, and noted the excellent condition & completeness in the Registry.  Congratulations!

 

My GHS 452 is missing the JTII badge and serial number paperwork - dang it!

 

The lens on my 452 is collimatible:  Goto put 3 arcs of paper on one of the inner cell sides to tilt it (about 0.3mm).  And, I can loosen the 3 screws on the outer cell casing and slide / tilt the lens to square it with the focuser.

 

From the photos, I assume the 451's focuser can rotate as on the 452?


Edited by Bomber Bob, 04 August 2017 - 10:30 AM.


#9 Stew44

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Posted 04 August 2017 - 11:38 AM

Yes, the focuser does rotate.



#10 Stargoat

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Posted 04 August 2017 - 01:53 PM

The scope pictured sure looks like the 4151one pictured in the S E Laszlo 1957 catalogs.

 

See S E Laszlo 1957 catalog

 

Is scope the one that had a Parts List Dated Feb 27th, 1958?

 

Wanted to share with you this Lazlo offering from Goto.  I would call this a Model 201 in the Goto lineup, but it is obviously later than the 56-59 printed literature which show a much simpler Alt Az configuration for both the 1XX series and the 2XX series scopes.  It has the porro prism erector and a molded Goto logo on the side plate of the diagonal.  The fact that there are spacers between the lens elements and the f/15 ratio makes it a Fraunhaufer design IMHO.  It also has one of the convertible 10mm-20mm eyepieces with only a HM6mm added for fairly spartan range of magnification.  The mount is Unitron-esque, and Goto may have felt that this was a viable way to go in evolution (and maybe a Nihon Seiko patent had run out).  In any event there does appear to actually be a serial number here (391) besides the Laslo model number (451).  Note the tapered focuser tube with a short .965 draw tube with split friction eyepiece holder.  Looks like cost saving move to me.   Looking forward to getting it out under the stars.

 

attachicon.gifP8040556.JPG

attachicon.gifP8040557.JPG

attachicon.gifP8040558.JPG

attachicon.gifP8040559.JPG

attachicon.gifP8040552.JPG

attachicon.gifP8040555.JPG


Edited by Stargoat, 04 August 2017 - 01:58 PM.


#11 deepwoods1

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Posted 04 August 2017 - 03:11 PM

Look at my gallery images at my 451. Perhaps they will help with questions. 



#12 Stew44

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Posted 04 August 2017 - 03:41 PM

Thanks, forgot the inventory/inspection tag on box lid.  Won't show the eyepiece instructions.  So later mod in my case is only a year later or less.  blush.gif

 

P8040551.JPG


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#13 Stew44

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Posted 04 August 2017 - 04:56 PM

In the catalog Stargoat provided, the 451 is the Fraunhaufer 201.  Yet the 452 is the Cooke 105 in Goto's model numbers.  Lazlo kind of lined them up the way he wanted to I guess.



#14 JonTeets

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Posted 04 August 2017 - 05:28 PM

In the catalog Stargoat provided, the 451 is the Fraunhaufer 201.  Yet the 452 is the Cooke 105 in Goto's model numbers.  Lazlo kind of lined them up the way he wanted to I guess.

 

Congrats on the 451!  It's a wonderful little scope, pleasing both optically and mechanically.  It also holds its own aesthetically alongside my Questar in the dining room.

 

I bought mine from Terra last year and couldn't be happier with it:

https://www.cloudyni...t-from-mr-moto/

 


Edited by JonTeets, 04 August 2017 - 05:29 PM.

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#15 Terra Nova

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Posted 04 August 2017 - 06:13 PM

I'm glad you are enjoying it Jon! :)


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#16 Stew44

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Posted 05 August 2017 - 07:15 AM

Bench tested this morning.  Really nice image on both sides.  Clouds preclude observing anything in the heavens (of course).  At the scope mount mating, the red felt appears to be Goto standard?  And like deepwoods1 the scope in more or less permanently mounted with hex head bolts.  Do any others have knobbed mounting bolts?  Case is very tall and meant to store scope with mount removed from yoke and left attached to tube.


Edited by Stew44, 05 August 2017 - 07:19 AM.


#17 Stew44

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Posted 07 August 2017 - 06:30 PM

Here is a Goto brochure from Sept 1957 (in Japanese) that just happened to be in the papers accompanying my Model 105.

Goto 201 pg1.jpg

Goto 201 pg2.jpg

Goto 201 pg3.jpg

Goto 201 pg4.jpg


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