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Stardust Blue SV90TBV fluorite arrives!

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#26 Scott in NC

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Posted 31 January 2013 - 04:35 PM

Don't let the small difference in aperture make you want to give either one up someday. You'll end up kicking yourself. Both are superb instruments and a real joy to own.


Thanks for the advice, Robert. I think both the SV80S and SV90TBV are here to stay! :grin:

#27 Scott in NC

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Posted 02 February 2013 - 03:01 PM

I finally got a chance to snap some pics of the SV90TBV. Enjoy!

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#28 Scott in NC

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Posted 02 February 2013 - 03:02 PM

#2 (Note that the white-colored "blotches" on the bottom of the dewshield and forward part of the OTA are just reflections off the mount/tripod and pavement, and not scratches.)

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#29 Scott in NC

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Posted 02 February 2013 - 03:04 PM

#3

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#30 Scott in NC

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Posted 02 February 2013 - 03:05 PM

#4

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#31 Scott in NC

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Posted 02 February 2013 - 03:05 PM

#5

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#32 Scott in NC

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Posted 02 February 2013 - 03:07 PM

#6 (and now the important part, the fluorite lens!) :jump:

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#33 Scott in NC

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Posted 02 February 2013 - 03:08 PM

Sorry that I couldn't resist posting so many pics, but this scope is truly as beautiful to look *at* as it is to look *through*! :grin:

#34 SteveG

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Posted 02 February 2013 - 03:45 PM

Beautiful scope!

#35 Widespread

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Posted 02 February 2013 - 05:17 PM

Congrats again! That is one easy-on-the-eyes instrument. A comparison with a 90 Raptor would be great, if you ever get a chance.

Clear skies,
David

#36 m9x18

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Posted 02 February 2013 - 09:11 PM

...this scope is truly as beautiful to look *at* as it is to look *through*! :grin:


So true! Thanks for the pix! :bow:

#37 Scott in NC

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Posted 02 February 2013 - 10:00 PM

Thanks everyone for the nice comments! :)

#38 Scott Beith

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Posted 02 February 2013 - 11:10 PM

Your pics increased my drooling! :drool5:

#39 Scott in NC

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Posted 03 February 2013 - 05:48 AM

Your pics increased my drooling! :drool5:


Uh oh...am I going to have to buy you a new keyboard now? I'll try to find you a waterproof one next time. :roflmao:

#40 jrbarnett

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Posted 03 February 2013 - 11:18 AM

Looking good, Scott. It looks like a good match in size for the mount. I'd say a 90mm has more in common performance-wise to a 4" than a 3". The venerable Amtares "Vixen Spec" 105s are actually stopped down to about 94mm due to cell design. I've not noticed much difference in brightness between 100s, 102s and the 94. I bet 90mm will be much the same.

It also looks like your dew shade is clear-coated just like the OTA. My recent (used) SV80S has a different hue of blue on the shade than on the tube due to missing or failed clearcoat on the shade. Looks like that is a fluke.

I really like the way yours looks. Is it really fluorite (as in the crystal) or low dispersion (ED) glass that happens to have some amount of fluorite in it (FPL-53, etc.)?

Regards,

Jim

#41 Scott in NC

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Posted 03 February 2013 - 02:06 PM

Hi Jim, this will be the third Stardust Blue scope that I've owned over the past several years (but I've seen several others owned by other people as well). In all of them the color and finish of the main OTA matched up with the color and finish of the dewshield. What I don't know is whether or not SV may have changed the Stardust Blue color or finish slightly over the years. Since you bought your SV80S used, I wonder if the main OTA and dewshield were originally parts of two different scopes? :shrug: Just a guess.

Re: the lens material of my SV90TBV, the ED element is true fluorite crystal, i.e., CaF2, and not a "fluorite-like" type of glass. But SV does produce a version of this scope using FPL-53 as the ED element. The lens cell is slightly different in the two versions, but other than the inscription on the lens cell, the scopes otherwise look pretty much the same, and are said by SV to be optically identical. I've only looked through one other fluorite SV90T though, and have never looked through a non-fluorite SV90T before.

#42 Rich V.

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Posted 03 February 2013 - 02:09 PM

Is it really fluorite (as in the crystal) or low dispersion (ED) glass that happens to have some amount of fluorite in it (FPL-53, etc.)?


SV made a lot of these 90mm fluorite scopes over the last five years or so; back in 2007 I considered one but bought an 80S instead.

They only sell the FPL53 version now, though.

SV90TF info page

Rich






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