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#1 clintwhitman

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Posted 23 June 2007 - 11:58 AM

Hi All I wanted to comment of something I have noticed about Glass and telescopes. I have been collecting old Japan made refractors mainly due to there optics and mechanics. Most of these are 80 and 60mm Towa and Carton 1960s. I have a Takahashi 130 F which is my main scope for photography and viewing it is and awesome instrument and worth every dime I paid for it! They retail for 7k that’s for the OTA. Looking at the glass from the front is like looking at nothing else I owned until I found this little tiny 5CM Kogaku.
The glass in these two telescopes looks strange compared to all the other scopes. It has a strange curly wispy look to it. Even the Unitron glass doesn’t have this look to it. It looks like normal. I want to say the light when shined in the front of the objective dances around kind of like looking at a big diamond. I just wanted to see if anyone else noticed this when working with old scopes and what other old scopes have this quality. :bow:

#2 mikey cee

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Posted 23 June 2007 - 12:17 PM

Clint...May be one of a kind. Probably a coating technique. If it were in the glass you'd think it would scatter light. Without seeing it first hand don't know if its "colorful" or pure clear diamond sparkly looking? Gotta' be light playing on your mind's perception or it would flaw the image throughput. :question: :question:Mike

#3 twhite

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Posted 23 June 2007 - 04:13 PM

Maybe it's magic.

#4 Glassthrower

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Posted 24 June 2007 - 09:05 AM

I second Tony's suggestion. Old Zeiss and Nikon scope OTA's are filled with fairy dust, it's best not to open them or question things. ;)

#5 davidmcgo

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Posted 24 June 2007 - 11:17 AM

Hi Clint,

I think what you are seeing is the higher degree of optical polishing on the higher end scopes. I noticed the same thing comparing my uncoated corrector plate on my old Celestron C10 made in 1965 to an uncoated C8 corrector plate from 10 years later. The C8 corrector looked like window glass. The C10 looks "wet" in comparison (and gives very high contrast even with just plain aluminum on the mirrors).

Dave

#6 clintwhitman

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Posted 24 June 2007 - 01:07 PM

Telvue eyepieces seem to hahe some fairy dust on some of them to

#7 Vesper818

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Posted 24 June 2007 - 01:11 PM

Stardust in your eyes!...

#8 twhite

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Posted 24 June 2007 - 01:37 PM

I second Tony's suggestion. Old Zeiss and Nikon scope OTA's are filled with fairy dust, it's best not to open them or question things. ;)


It's kind of like the magic smoke supply in electronics... it's never quite the same once the magic smoke supply is released. :p

#9 Vesper818

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Posted 24 June 2007 - 02:13 PM

Yah, neither was my oven after hubby spilled bbq in the bottom and we had to air out the house.....

#10 ngc2289

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Posted 24 June 2007 - 02:25 PM

Wait a minute here! I know for a fact it is pixie dust not fairy dust! Get your facts right!!!! :mad: :rant: :ohgeeze: :sumo: :smarty:


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