Celestron Nature DX ED 10x42mm Roof Binoculars
Celestron
Torrance, California
Celestron Nature DX ED 10x42mm Roof Binoculars feature extra-low dispersion objective lenses and BaK-4 prisms, assuring proper color without fringing. All lenses are fully multicoated. The binoculars have a true field of view of 5.9° and can focus as close as 6.5 feet (2 meters). Weighing in at 24.9 ounces (705 grams), they’re waterproof and nitrogen-filled to prevent fogging.
$239.95
1-310-803-5955
www.celestron.com
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Martian Impact Craters: A Morphological Perspective
Cambridge University Press
Cambridge, England
Martian Impact Craters: A Morphological Perspective by Peter J. Mouginis-Mark and Joseph M. Boyce introduces readers to the science of cratering. Although most of the book’s 161 heavily illustrated pages relate to martian craters, Chapter 1 talks about impact crater formation in a general sense, and Chapter 2 looks at craters throughout the solar system.
$150 (hardcover or ebook)
+44 (0) 1223 326050
www.cambridge.org
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iOptron’s iEFW-15 Electronic Filter Wheel
iOptron
Woburn, Massachussetts
iOptron’s iEFW-15 Electronic Filter Wheel lets you automatically control up to five mounted 1¼-inch or unmounted 31mm filters. The unit is powered through a USB-C connection and weighs 7.8 ounces (220 grams). It measures 5 by 5¾ by 3¼ inches (127 by 146 by 83 mm) and is compatible with both ASCOM and INDI drivers.
$199
1-781-569-0200
www.ioptron.com
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