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Equipment Discussions >> Binoculars

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GlennLeDrew
Pooh-Bah
*****

Reged: 06/18/08
Posts: 1304
Loc: Ottawa, Ontario, Canada
Re: Orion 90-degree BT 100 "Premium" Binos new [Re: RobertPL]
      #3318817 - 09/06/09 04:36 PM

These binos which can accept standard 1.25" eyepieces should have specified where the focal surface lies with respect to the fully-racked-in focuser barrel's top surface. This would allow the possibility to determine *in advance* just what eyepieces one could use.

If the focal surface lies a bit too far down the barrel (i.e., not far behind the prism/optical window), this would limit the user to only those eyepieces having their field stops located relatively close to the bottom of their own barrels. In other words, shorter f.l. eyepieces, as well as some of those employing optics ahead of the field stop, may not be useable because they can't be racked inward far enough to get their field stops to the focal surface.

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Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces

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Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.


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mtb54703
sage
*****

Reged: 11/12/08
Posts: 205
Loc: Eau Claire, WI
Re: Orion 90-degree BT 100 "Premium" Binos new [Re: RobertPL]
      #3332958 - 09/14/09 09:15 AM

For those who can't get to the image on the website, here's a link that appeared in the email announcement.

http://site.starrynightstore.com/OrionEmails/09_01_09_Countdown_4/09_01_09_Top_10_no4_09.jpg


Orion's website uses flash player, so if you don't have the plugin installed and/or enabled, you won't get an image for any of the products.

http://www.telescope.com/control/product/~product_id=09566

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18" F/4.11 AstroSystems Telekit under construction
Meade 12" Lightbridge
Garrett 100mm F/5.3 45º Binocular Telescope
Vixen Foresta 7x50
Chippewa Valley Astronomical Society


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Prof M
member


Reged: 07/26/09
Posts: 49
Loc: Southwest Utah
Re: Orion 90-degree BT 100 "Premium" Binos new [Re: Mike Rapchak]
      #3338563 - 09/17/09 01:20 AM

I just got an e-mail ad from Orion pricing the BT 100 at $1199. Weren't these only $699 a year ago? I may be crazy, but...

Keith


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Jay_Bird
scholastic sledgehammer
*****

Reged: 01/04/06
Posts: 959
Loc: Nevada 36N 115W
Re: Orion 90-degree BT 100 "Premium" Binos [Re: Prof M]
      #3338574 - 09/17/09 01:33 AM

You may not be crazy, but you are thinking of pricing for the 70mm version.

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