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Altair 100mm 45° Giant Observation Binoculars w/18mm UF EPs


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Altair 100mm 45° Giant Observation Binoculars w/18mm UF EPs
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Altair 100mm 45° Giant Observation Binoculars w/18mm UF EPs

An excellent choice for those looking for large observation binoculars for both Astronomical and terrestrial observation. Featuring 100mm achromatic objectives and supplied with 2x18mm Ultraflat field 1.25" eyepieces (giving 30x magnification), these large binoculars can take many commercially available 1.25" gauge eyepieces - giving the user flexibility in terms of the powers you can usefully use - and also allowing the use of many 1.25" filters, including light pollution and narrowband filtration to enhance deep sky observations.

Main features:

Very bright image and large field of view, well suited for observation of bright deepsky objects.
Independent helical focusers with self-centering compression eypiece holders.
Enables use of 1.25" Light Pollution filters, such as the Altair Premium 1.25" CLS filters.
Extra large 28mm prisms with top quality broadband multi-coatings on all optical surfaces.
High quality independently focusing 1.25" eyepiece holders - compression-fit with self centring brass inserts.
Tough, light magnesium alloy casing.
Includes a carry handle with sight.
Extensible dew shields. Dew shield ID thread: M 116 x 1-6H, 6 mm depth.
Includes front dustcaps and rear dust plugs. Both eyepieces have dust caps.
The base has a standard 3/8" Photo tripod thread and 1/4" Photo tripod adapter so you can use your giant binoculars with a standard tripod. An additional pair of in-line threaded holes allow mounting on a Vixen-format dovetail bar, or the new Single-Arm Binocular mount (code: BINOMOUNT1).
Included in delivery:

100mm binoculars with carry handle and tripod adapter
4 Dust Caps
Set 18mm UF 65 degrees = 30 x magnification
Double Carton Packing, rigid foam insert.
Technical specifications:

Dimensions 550 X 270 X 200mm
Weight 7.1kg
Interpupillary distance 54-75mm
Eyepiece Adapter: 31,7 mm / 1.25" Astro eyepiece compatible
Dewshield Dia. 116mm
Focal Length 550mm
Objective Lens Diameter 100mm
Objective angle of view: max. 2.8 Degree
100mm F5.5 Proprietary CDGM dual element objective lens with improved colour correction.
28mm Oversized K9 Prism Clear Aperture (field stop diameter: 25 mm).
Prism glass type: K9 equivalent to BAK4.
Broadband Hardcoat Multi-layer coatings on all surfaces.
Photo tripod thread: 1/4-20 and 3/8"
Performance with included 18mm Ultraflat Eyepieces:

Minimum Focusing Distance 25m
Eyepiece Lens Structure(#Elements/# Groups) 8/5 Ultra-flat design
Eyepiece Focal Length 18.45mm
Magnification with 18mm Eyepieces 30x
Real Field of View 65-66° Apparent Field of View 2.2°
Field of View at 1000m = 38.4m
Exit Pupil φ3.3mm
Relative Brightness 10.9
Twilight Factor 54.8
Eye Relief 20mm
Eyepiece Weight 200g
Eyepieces Waterproof: Yes

Altair Astro reserves the right to change the price and/or specification without notice.

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