In amateur and professional astronomy, refers to a high level of magnification (power) used in telescopes.
The 457X is a rare export-market radio designed by the pioneering American industrial designer in 1936 . Teague is famous for creating the iconic "Bluebird" and "Nocturne" glass radios, but the 457X is often considered his most aggressive and sophisticated "Streamline Moderne" work. Key Design Features
Depending on the context, "457x" can also refer to specific technical or scientific markers: 1. Astronomy Magnification In amateur and professional astronomy, refers to a
: The "Euro-Sled" nickname comes from its low, sleek profile and the horizontal lines that resemble a sled or a high-speed locomotive from the period.
: An observer using a 16-inch telescope might "bump the mag up to 457x" to view fine planetary details or resolve tight double stars. Key Design Features Depending on the context, "457x"
: This specific model was produced by the Sparks-Worthington Company of Jackson, Michigan, primarily for the European market, making it significantly rarer than domestic Sparton models. 🔭 Secondary Technical Meanings
: It is characterized by high-quality grey mirrors set against a contrasting ebony (black) lacquer finish. : This specific model was produced by the
: Some academic journals use these digits in their serial numbers. For example, the online version of the journal Food Science and Technology (Campinas) uses ISSN 1678-457X . 3. Finance and Markets