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CRICO Eyepieces

Eyepieces
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#1 The_Vagabond

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Posted 20 January 2025 - 05:17 PM

Greetings, Star Hustlers!

Does anyone know the barrel diameter of the original CRICO eyepieces?

Much Obliged!



#2 strdst

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Posted 20 January 2025 - 07:45 PM

These came with a 1958 Criterion Dynascope and are 1.25" diameter.

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#3 The_Vagabond

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Posted 20 January 2025 - 09:03 PM

These came with a 1958 Criterion Dynascope and are 1.25" diameter.

Thanks for the reply.
I'm wondering if they may have had a smaller size for the really early Dynascopes, which I think in addition to being a smaller aperture also used weird eyepieces. 
It's possible I might be getting them and later SkyScopes (3" f/12) confused.



#4 strdst

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Posted 20 January 2025 - 09:10 PM

I had a skyscope that I sold with a few eyepieces which weren't a standard telescope barrel diameter. IIRC smaller that .965. Microscope eyepiece size perhaps?
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#5 The_Vagabond

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Posted 20 January 2025 - 09:38 PM

I had a skyscope that I sold with a few eyepieces which weren't a standard telescope barrel diameter. IIRC smaller that .965. Microscope eyepiece size perhaps?

There is a brass fitting inside the draw tube that, if you could remove it without breaking the delicate old Zymac casting would bring it up to 0.965". I mean, it's just barely there.

Amazingly, my SkyScope actually survived my disastrous move. I need to stiffen up the draw tube, but it is still usable.

IMG 20250120 212951

 


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#6 John Rose

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Posted 21 January 2025 - 06:05 PM

I just measured an old Criterion 16.3mm Erfle.  0.945". I expect the old Crico are the same. 


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#7 The_Vagabond

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Posted 21 January 2025 - 06:33 PM

I just measured an old Criterion 16.3mm Erfle.  0.945". I expect the old Crico are the same. 

Ah, thank you!



#8 The_Vagabond

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Posted 30 January 2025 - 11:59 AM

Going to bump this up.

I purchased the CRICO eyepieces, a 9mm AR and 18mm H, and they worked perfectly in the old SkyScope. The 9mm has a small clam chip, but is still amazingly clear. Also, a number of small eyepiece parts arrived with them.


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