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|Objective diameter:||33 mm|
|Field of view:||477 ft / 159 m @ 1000 m (9.1 degrees)|
|Eye relief:||15 mm (0.59 in)|
|Exit pupil:||4.7 mm (.19 in)|
|Near focus:||6.5ft ft (1.98 m)|
|Interpupillary distance:||56-73 mm (2.2-2.87 in)|
|Lens coatings:||Fully multi-coated|
|Body:||Open hinged magnesium alloy|
|Prism type:||BaK-4 Roof|
|Size:||5.5 x 4.9 x 2.1 in (140 x 125 x 55 mm)|
|Weight:||21.2 oz (601 g)|
|Included accessories:||Neck strap, harness strap, objective lens caps, rainguard, carrying case, lens cloth, instruction manual|
The Celestron Granite 7x33 binocular is the smallest and most compact of the Celestron Granite binocular family, weighing just 22 ounces. This is achieved by way of a mangesium alloy body, which provides the light weight without sacrificing strength and durability. A rubber armor coating protects the Celestron Granite 7x33 from impact and abrasion. We are generally fans of the open bridge designs of the latest crop of ED binoculars ,and the Celestron Granite 7x33 is very comfortable for its size.
The hinge on the open bridge is the perfect tightness. Not so loose that it can be accidentally moved from optimal interpupillary distance, and not so tight that it has to be manhandled to be adjusted. Most 7x33 binoculars aren't commonly used on tripods, but there's certainly nothing preventing it with the Granite 7x33, because there is a tripod adapter thread hiding behind the front hinge cap. Diopter adjustment is buttery smooth. The focus knob is also very smooth, no excess play and certainly not too tight, and goes from close focus to infinity in about 1.25 turns. This quick focus is, in our opinion, just right. Fast enough to quickly focus, but not so fast as to overshoot focusing on a target. The eye cups are three position rubber, and have a wiggle of about a millimeter when in the middle and extended positions, maybe a little less in the lowest position. Like the rest of the Celestron Granite binocular family, the Granite 7x33 has a set of objective lens covers that attaches to a rubber clip on the bottom of each side of the body. The caps are nice because they are harder to lose than the slip-on type, but because they are smaller, there's not enough weight to hold them down - they sort of hang in an upward fashion, which can get in the way during viewing. Over time, they should get used to being opened and closed, and hang below the field of view.
Since the Celestron Granite 7x33 has ED glass, there's some really good clarity and sharpness to the view. We see a little bit of warmth in the color seen through the binocular when compared to true color. The 9.1 degree field of view is great, but the tradeoff is some softness to the edges. On the plus side, the field of vew is mostly flat, and chromatic aberration is completely nonexistent.
Included with the Celestron Granite 7x33 ED binocular is a fabric/rubber carrying case, padded neck strap, Celestron binocular harness, cleaning cloth, and owner's manual.
Being the smallest and lightest of the Celestron Granite binoculars, the 7x33 ED is about as close to compact as we're wiling to get. They compare very favorably with the array of Asian manufactured open-bridge ED binoculars, and should be a nice addition to the birder or hunter looking for a wide field of view in a lightweight package.
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Celestron Granite Series Roof Prism Binoculars are the pinnacle of optical and mechanical design. Granite offers all the features you’d expect from a top-of-the-line binocular, including ED (Extra Low Dispersion) glass. The ED objective lenses and fully multi-coated optics provide excellent sharpness and color correction, while virtually eliminating chromatic aberration. Granite also features BaK-4 prisms with phase and dielectric coatings to increase light transmission and overall image quality.
As the name implies, Granite binoculars are made to withstand the test of time. They are constructed from magnesium alloy, which is tougher and lighter than aluminum. Granite also features metal—not plastic—twist-up eyecups.
Joining the beloved Granite series is the 7x33 model. This new model provides an excellent balance between performance and comfort, weighing just 21 ounces. The 7x33 provides a wider field of view compared to 42mm binoculars, making them an excellent choice for travel, sports and outdoor activities.