Garrett® 100mm F/6.1 90º Binocular Telescope & Case

Essentially a scaled-up version of our popular 70mm F/5.4 model, the Garrett® 100mm F/6.1 binocular telescope is designed with integrated 90º-angled 1.25-inch helical focusers, which makes it a great choice for amateur astronomy.

It weighs in at just 14.3 pounds - about half the weight of competing designs, and only one pound heavier than our GT100-45. Here's a binocular that will accept virtually all your 1.25" telescope eyepieces and still be light enough for quick and easy setup. The precision helical focusers are angled at 90º to make observing even at the zenith comfortable. This binocular offers the best features of a rich-field telescope – such as the ability to easily vary magnification – without sacrificing the three-dimensional viewing experience of a binocular.

The flat-field objective lenses operate at an F/6.1 focal ratio, which is slow enough to deliver high-contrast views of deep space objects and solar system targets alike. From quick looks at the moon and brighter planets to comet hunting, the Garrett® GT100-90 binocular telescope can take you wherever you want to go. The binocular includes a set of standard 1.25" oculars, 18.5mm (63° AFOV) focal length, yielding 33x magnification and a true field of view of 1.9°. Additionally, you always have the ability to expand your magnification range by inserting virtually any 1.25" telescope eyepiece from 40mm down to about 9mm. All air-to-glass surfaces in the air-spaced achromatic objective lenses and the prisms are broadband multi-coated, and the precisely-polished prisms are crafted from high-index BaK4 optical glass. The cast-aluminum binocular body features a durable and attractive glossy white finish and integrated retractable dewshields. Matching removable carrying handle included (not shown).

One special feature built into the 100mm F/6.1 binocular telescope is the unique twist-lock compression ring eyepiece holders - this is essentially a scaled-down version of the system used on our 150mm binocular telescope, and it makes switching and properly centering eyepieces a snap.

A dovetail base for our MRRF finder is now pre-installed on the left hand barrel of the binocular at no additional charge.

For those looking for an affordable mount the Garrett Series 5000 is hard to beat. What's more, the Series 5000 is available as a package with the GT100-90 for just $200 additional. You can also use many heavy-duty tripods or parallelogram mounts with the standard ¼-20 threaded mounting plate that's integrated into the design. Included with each binocular telescope is a high-quality aluminum-trimmed carrying case.

Each binocular telescope is individually tested for collimation as part of our 14-point inspection, and any necessary adjustments are performed by a highly-experienced technician. Collimation is adjustable by experienced users. It is also covered by our two-year warranty and 30-day return policy.

Tripod Package Available - Save up to $50:

100mm F/5.3 Binocular Telescope + Series 5000 Tripod / Head - $1249.95

Items must be ordered together to qualify for discount. Select your package with the check-box above, then click the "Add to Cart" button...

Click here for Technical Specs

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

Garrett® Binocular Telescope Specifications
MODEL	GT70-90 Binocular Telescope	GT100-45 Binocular Telescope	GT100-90 Binocular Telescope	GT150-45 Binocular Telescope
OBJECTIVE LENSES	70mm f/6.2; 2 Elements, 1 Group	100mm f/5.3; 2 Elements, 1 Group	100mm f/6.1; 2 Elements, 1 Group	150mm f/5.5; Triplet
ACCEPTS STANDARD EYEPIECES	Yes; 1.25" only	Yes; 1.25" only	Yes; 1.25" only	Yes; 1.25" & 2"
MAGNIFICATION WITH INCLUDED EYEPIECES	25x	23x, 41x (1.25")	33x (1.25")	25x, 30x, 35x (2")
EYE RELIEF OF INCLUDED EYEPIECES	15.5mm	20.5mm, 14.5mm	15.1mm	21.7mm, 20.5mm, 17.5mm
EXIT PUPIL WITH INCLUDED EYEPIECES	2.8mm	4.3mm 2.4mm	3mm	6mm, 5mm, 4.3mm
APPARENT FIELD OF VIEW OF INCLUDED EYEPIECES	63º	57º, 60º	63º	65°, 72°, 67°
TRUE FIELD OF VIEW WITH INCLUDED EYEPIECES	2.5° (131 ft./1000 yds.)	2.5º, 1.5º (131, 79 ft./1000 yds.)	1.9º (100 ft./1000 yds.)	2.6°, 2.4°, 1.9° (138, 126, 99 ft./1000 yds.)
WEIGHT (w/out eyepieces)	8 lbs., 15 oz.	13 lbs., 4 oz.	14 lbs., 4 oz.	46 lbs., 3 oz.
LENGTH (dewshields retracted)	12.2-in.	18.2-in.	15.2-in.	29.5-in.
CLOSE FOCUS	16m	25m	25m	100m
IPD RANGE	57-73mm	55-72.5mm	57-73mm	62-76mm
COATINGS	Fully Broadband Multi-Coated	Fully Broadband Multi-Coated	Fully Broadband Multi-Coated	Fully Broadband Multi-Coated
WARRANTY	2-year limited warranty	2-year limited warranty	2-year limited warranty	2-year limited warranty

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Astronomy Binoculars