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From your perspective, is the Celestron Silvertop progression from "Fully Coated" to "Multi Coated" correct?

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Yes. Don't think I've ever seen one saying fully multicoated. I don't think it was until the mid 80's that fully multicoated became the rage. Not sure who first started doing this.

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You've just gotta love marketing one-ups-man-ship. I'm not sure I can recall a Celestron eyepiece that carried the moniker of "Fully Multi-Coated". Can you?

Thanks!
Blake

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The entire Ultima line was advertised as Full multi-coating.

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Thanks, Steve.

I just checked my Celestron Ultima and Axiom eyepieces and they are indeed marked "Fully Multi-Coated". I never noticed that before! Thanks for pointing it out. I should probably spend more time looking at them in the daytime!!!


Cheers!
Blake

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I thought Jan at University Optics was the 1st in the industry to offer "multi-coated or fully multicoated eyepieces". I somewhat recall that in one of his early catalogs where the Konigs had a "mushroom top". My Celestron 26mm "silvertop" Plossl reads Multi Coated.

Jim

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Then after Full Multicoated we had Fully Broadband Multicoated which means nothing really since would hope the eyepiece coatings transmit across the visible spectrum (i.e., broadband)

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Yeah, and my Cemex Eyepieces are optimized for daytime solar viewing. Hmmm, is the sun a star? Don'tcha just love marketing hype?


Cheers!

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There's also a 15mm but the one I had was marked as multi coated.

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I am confused. I just remembered that in the past when I was looking at pictures of the 50mm silvertop eyepieces they all seem to have the black rim on top.

like in: http://www.astromart.com/classifieds/details.asp?classified_id=764420

Is there a 50mm that is all Silver on top?
What version is this then?

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Okay I picked up
- 22mm Multi Coated
- 36mm Multi Coated
- 45mm Multi Coated
- 2X Barlow Multi Coated

Sorry the 22mm was not Fully Coated.

So now I plan to sell
- 36mm Fully Coated
- 2X Barlow Fully Coated
since I have Multi Coated versions of these.

Not sure what price to ask. The 36mm doesn't come up often at all. And to me being Fully Coated isn't that much of a difference or rarity to ask a higher price right?

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Hi Blake,

Curious is the 50mm available without the black rim?

What focal lengths are available for the each generation?

Dave

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Hi Dave,

I've never seen an all satin / engraved orange lettered 50mm 2" silvertop plossl. It appears that Celestron retained the all-black 2" format when the silvertops were first introduced. The makeover didn't happen until the twilight of silvertops during the blacktop era.

Generation 1 (all silver with engraved orange lettering "Fully Coated"):
45mm, 36mm, 26mm, 17mm, 10mm and Deluxe 2x Barlow.

Generation 2 (all silver with engraved orange lettering "Multi-Coated"):
45mm, 36mm, 26mm, 17mm, 10mm, and Deluxe 2x Barlow, initially;
22mm, 15mm, and 7.5mm were released later;
30mm was released last.

Generation 3 (silver with black tops and silk screened red lettering):
36mm, 26mm, 17mm, 10mm, 7.5mm and Deluxe 2x Barlow;
50mm 2" was also released during this timeframe.

I'd be very interested in hearing from anyone that has an example that is not listed above. For example, how 'bout an all silver 50mm 2" Silvertop? Or, maybe a 45mm black-top silvertop? Any takers?



Cheers!
Blake

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I'd be very interested in hearing from anyone that has an example that is not listed above. For example, how 'bout an all silver 50mm 2" Silvertop? Or, maybe a 45mm black-top silvertop? Any takers?

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