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100mm and Larger Binoculars

Notes on Fujinon 25x150 binoculars

Mar 14 2005 01:20 PM | Mr. Bill in 100mm and Larger Binoculars

Color is what one would expect from a f/5 achromat with air spaced doublet objective; definitely there but not objectionable. During daytime observing, it is noticeable as a thin yellow or violet band defining sharp changes in contrast such as the edge of a barn's metal roof against the background of shadow. If daytime observing was the primary use of these binoculars, then maybe the ED glass option would be worth consideration. The moon shows a small amount of color along the limb, but the surface detail and subtle gradations of color are remarkable. For deep sky use, however, the color is of little concern.

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Celestron SkyMaster 25x100 Binoculars

Mar 14 2005 11:36 AM | Guest in 100mm and Larger Binoculars

I was introduced to astronomy at 13 with a 60mm TASCO telescope on a terrible Alt-Az mount. I used that scope consistently and frequently until I discovered girls. Thirty years later, I acquired a nearly identical scope as part of an estate. I cleaned it up and carried it outside into the ice and snow of a New Hampshire winter and was instantly hooked again. Now, 7 years later and living in Tucson, AZ I have three scopes and get out twice or more per week (at least as far as the back yard). I have a superb sample of the Celestron CR-150 (f/8) achromatic refractor on an Orion Atlas mount. I use it with a violet blocking filter for the moon, planets, and doubles. I also have a reasonably good and heavily modified Meade SF-16 dob for deep sky. Finally, I have a wonderful Celestron Ultima 2000 (8 inch) and CCD camera for deep sky photos, comet chasing, and asteroid tracking. What was missing was a low power wide-field grab and go scope for the 5 nights of the week when I have only an hour or so to observe. I bought an ST-80 (80mm f/5) to fill that gap, but it sprouted guide rings and attached itself to the SF-16 as a finder scope.

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Astromeccanica/Hutech Borg 100ED Binoscope

Mar 14 2005 11:15 AM | Guest in 100mm and Larger Binoculars

This instrument is a hybrid 100mm binocular made up of a light-gathering front end using Borg 100ED objectives and a viewing back end using an Astromeccanica multi-mirror assembly in place of conventional prisms. I have no connection whatsoever with Borg, Astromeccanica or Hutech from whom I purchased this binoscope, nor did they know I would be writing this review. All photos are by the author.

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Mar 14 2005 11:13 AM | Guest in 100mm and Larger Binoculars

I have been searching for an outstanding pair of medium aperture (4-6") binoculars to cruise the galaxy for several years. Thanks to a brilliant designer named Tatsuro Matsumoto in Japan and a great amateur telescope maker named Joe Castoro in New York I believe my search is finally over.

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Apogee 25x100 versus BT-80

Mar 14 2005 11:08 AM | michiel in 100mm and Larger Binoculars

Hello, it’s me again. The wonderful thing about owning more various telescopes is that the amount of comparison reports that you can write goes up fast. I always like to compare so here we go. To introduce myself, I am living near the north sea coast in the suburbs of a large town in the Netherlands, I have a background in physics and astronomy. I have written some reviews for CN about an ETX70, a BT 80 binoscope, and a TAL 200K klevtsov with a Baader Binoviewer. At the moment I also own a 150mm F10 refractor and a 12 inch F4 newton light bucket and a 102mmf6 triplet achromat. Well, the word “ also” is rather misplaced because at this moment the TAL and the BT have been sold to what I heard very happy owners, I sold them not because I was not satisfied with them but because the quest for other scopes goes on and I cannot keep them all. (This is where my wife does not follow me anymore, once she asked me if amateur astronomy is only about buying and selling scopes, well…. It is part of the fun)

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Apogee 25x100 Binoculars

Mar 14 2005 11:02 AM | Guest in 100mm and Larger Binoculars

I have been enjoying astronomy for over forty years. I own a 10” f/4.5 dob, a 80mm f/5 refractor on a GEM, a twin 8” Newtonian binocular scope that I just finished making (I call it Dyno Bino), a pair of Binolux 7x35 binoculars as well as a pair of 12x60 Visioneer binoculars that I use on a home made parallelogram mount. I have always preferred two eyed viewing and lately I have been on a quest of sorts to explore the various ways to use both eyes in astronomical observing. Hence my “Dyno-Bino” project. Wonderful viewing, comfortable, less eye strain, etc, but the drawback (isn’t there always something) is ease of portability. Just as I purchased my 80mm f/5 for a quick ‘grab and go’ scope, I needed something as an alternative to the binoscope for quicker setups. And the other day I received delivery of my new Apogee 25x100 binos! Introductory cost of $299 plus $ 20 S&H.

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Oberwerk 100mm BT's

Mar 14 2005 10:18 AM | Guest in 100mm and Larger Binoculars

I have always wanted to spend the night slowly scanning the skies with a large pair of binoculars. Well, for the last five weeks I finally got that chance. I received a pair of the Oberwerk 100 BT's from Kevin Busarow at BigBinoculars.com in mid December. If you are not familiar with these, they are a highly modified version of the well known "100mm Chinese Border Binoculars" which have been adapted to use standard 1.25 eyepieces and have non-rotating helical focusers for astronomical use. They are a "straight through" design, which boast broadband multi-coatings on all glass to air surfaces.

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