Astronomy Binoculars
National Geographic 20X70 Rubber-armoured Porro Prism
$209.54Last catalog price, July 2008
Catalog description
National Geographic 20X70 Rubber-armoured Porro Prism, part number CII007, is a discontinued product from the 2007–2011 catalog. It was last listed at $209.54, down from a high of $261.93.
High power binoculars with extra-large 70mm diameter objective lenses for extraordinary brightness. Excellent for astronomical sky watching and very low light observing. Unique jewel green phase shifting multi-coatings enhance sharpness & color response. Body is fully rubber armored for protection and provides a good gripping surface. Features BaK-4 Porro prisms providing superb even edge-to-edge illumination & sharpness. Focuses as close as 39 feet. Viewing angle is 3.3 (Viewing area is 174 feet across at a distance of 1000 yards). Weight: 46 oz. Includes protective compression molded dual compartment case with zipper pocket and strap plus FREE NATIONAL GEOGRAPHIC Bird Migration in the Americas wall map.
Catalog price history
| Observed | Listed price | Change |
|---|---|---|
| September 2007 | $261.93 | |
| November 2007 | $209.54 | −$52.39 |
| January 2008 | $123.00 | −$86.54 |
| March 2008 | $209.54 | +$86.54 |
| April 2008 | $128.00 | −$81.54 |
| June 2008 | $118.00 | −$10.00 |
| July 2008 | $209.54 | +$91.54 |
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