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GOT TO GO TO GOTO RESTO....

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#1 TOM KIEHL

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Posted 18 December 2018 - 04:07 PM

This one is going to be a restoration thread . I might have to use your collective wisdom on this restoration . I have been putting this one off for some time due to the case woodwork , and some missing parts that will have to be worked around . The case.... I will start on first . The top and bottom both need replaced due to de laminating plywood  . I'll also have to keep on the look out for some EP's , An EP tray for the tripod , a diagonal , and a finder scope or make what I have work .

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#2 TOM KIEHL

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Posted 18 December 2018 - 04:10 PM

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#3 starman876

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Posted 18 December 2018 - 04:14 PM

Nice looking scopewaytogo.gif


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#4 G-Tower

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Posted 18 December 2018 - 05:48 PM

That one brings back back memories. Brought one back from Japan many years ago. I think it's still in Puerto Rico at a relative's house. 


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#5 deepwoods1

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Posted 18 December 2018 - 05:51 PM

I own it’s smaller brother, the 451. Nicely constructed. Looking forward to your restoration. 


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#6 Exnihilo

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Posted 18 December 2018 - 08:34 PM

Wow, F20. Impressive! Beautiful scope!
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#7 starman876

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Posted 18 December 2018 - 11:15 PM

Love them F20 scopes.


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#8 Compressorguy

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Posted 19 December 2018 - 07:00 AM

Beautiful scope! Looking forward to following this thread. Congrats. 


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#9 AaronM

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Posted 19 December 2018 - 07:28 AM

Very nice scope - enjoy it !

 

Kind regards from germany, Michael Aaron


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#10 Stew44

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Posted 19 December 2018 - 08:42 AM

Ooooo....   Please show us a pic of the lens.  Looking forward to your efforts.  Looks like one eyepiece and sun filter.  Which eyepieces are you missing?


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#11 Bomber Bob

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Posted 19 December 2018 - 09:14 AM

Love them F20 scopes.

Me, too!


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#12 terraclarke

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Posted 19 December 2018 - 09:58 AM

waytogo.gif waytogo.gif Great find Tom! Looking forward to watching you work your magic on it!


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#13 TOM KIEHL

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Posted 19 December 2018 - 11:20 AM

Ooooo....   Please show us a pic of the lens.  Looking forward to your efforts.  Looks like one eyepiece and sun filter.  Which eyepieces are you missing?

I'm so embarrassed bigblush.gif .....This objective is SO Dirty ! No fungus but one very small chip at 1 o'clock at the extreme cell edge  . Water smudging stains between the flint and crown . I'm in hopes that it will clean up nicely . 

 

I am missing the H 6 , H 9 , and the accessories to configure the H 25 EP's .....ALSO ...A GOTO diagonal , and the elusive Equipment Tray .

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#14 deepwoods1

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Posted 19 December 2018 - 02:08 PM

Wait, you're not done yet?


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#15 Kokatha man

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Posted 19 December 2018 - 06:13 PM

Is that a spiral galaxy imprinted onto the lens? Sorry for that weak joke Tom..., I'm in "astro down-time" atm but your thread & project has pricked up my ears & I look forward towards more developments! flowerred.gif


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#16 Dave Trott

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Posted 20 December 2018 - 11:37 PM

I recommend that you figure out that lens before you spend any time on anything else. 


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#17 shredder1656

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Posted 21 December 2018 - 04:45 AM

Really looking forward to the show!


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#18 TOM KIEHL

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Posted 21 December 2018 - 11:11 AM

I recommend that you figure out that lens before you spend any time on anything else. 

Working on it .........The outcome looks bleak . frown.gif  bawling.gif



#19 deepwoods1

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Posted 21 December 2018 - 04:04 PM

Nooooooooooooo.........That would be a shame. Recoat possibly?



#20 TOM KIEHL

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Posted 21 December 2018 - 04:35 PM

I removed the main lens today to Attempt to clean that dreaded  " Galactic Swirl  "   from it . Upon removal it was noted that the factory orientation mark had indeed moved . The swirl is on the skyward face of the lens only , all other surfaces look fine . The swirl doesn't look like a fungus etching that I have ever seen before . Rather it appears to be in my opinion a Mineralization  or calcium deposits . All attempts to clean this " Swirl " from the  lens surface have failed so far . Presently I have the crown soaking in a solution of some Micro 90 ( Laboratory glass cleaner ) . Hopeful but not convinced that this soak will work . The lens could have a permanent ETCH bawling.gif   

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#21 TOM KIEHL

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Posted 21 December 2018 - 05:19 PM

While the soak continues on the main lens . I will turn my attention to the case repairs to get my mind off that lens . To try to patch or replace missing veneer from a case makes it look just like that , a Patch Job ... So in an attempt to preserve the labels on the inside of the case lid . I tried to remove the exterior veneer and the center wafer of the 3 ply Luann plywood keeping the case interior veneer intact with labels  . With the intentions of replacing the removed 2/3 of the plywood with a new piece laminated ( glued ) to the old interior piece with the labels . This would of been Boss IF I could of pulled it off . That attempt FAILED miserably . SOoooo back up and Punt . I did save the original interior veneer and labels between the interior scope tube bucks . This will be carefully cut with a SHARP Exacto knife blade on the traced pencil mark and then glued to the interior side of the new Luann plywood case lid between the same bucks . I found some new Luann 5.0mm thickness  that has a grain pattern that matches the original Luann to a T...... I bought a 4'x8' sheet 16 bucks . Have never seen this kind of Luann Ply before . Types of Luann ply ,  changes like the weather . This is the best I've seen in some time .The last image shows the lid frame , less the old damaged Luann Ply , and the moth eaten white felt liners . I had to reglue the bucks and the veneers to them .   

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#22 deepwoods1

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Posted 21 December 2018 - 05:44 PM

Did the parts list label get wet? 


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#23 TOM KIEHL

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Posted 21 December 2018 - 05:55 PM

Did the parts list label get wet? 

Yes it did frown.gif ....... Like I said , " My first attempt failed miserably "..... I tried to Steam the lamination apart here and there . That is where the water stain came from on that label . It soaked through a crack in the veneer from the back side . After that happened I tried a different approach ..... It is what it is .... If I could only have a RE DO tongue2.gif   



#24 Kokatha man

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Posted 21 December 2018 - 06:52 PM

Gee, I hope you can revive that lens Tom...you say it looks like "mineralisation" or "calcium deposits" - is it possibly some bizarre reaction of the MgF2 coating, if indeed Goto used AR coatings. MgF2 looks white as a mineral, per se... confused1.gif

 

I know that here in Oz a fella does lens strips & AR recoats - the only person who does this or aluminising in actual fact in the whole darn country...but over your way I'd imagine there would be quite a few operators...


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#25 deepwoods1

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Posted 21 December 2018 - 07:10 PM

Ouch, sorry. I was going to ask how you delaminate. You are a braver man than I. Which is why I have sooooo much hanging around.


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