| 1. | For an achromatic dispersive lens the converse must be adopted.
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| 2. | The'K'component absorbs all wavelengths and is therefore achromatic.
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| 3. | The Oschin Schmidt was given an achromatic corrector and provisions for autoguiding.
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| 4. | He was the first to enunciate errors in achromatic telescope.
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| 5. | It is available in two colors : Cranberry Red and Achromatic Black.
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| 6. | In practice, the lens will be an achromatic doublet.
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| 7. | In conditions of insufficient light, perception is achromatic and ultimately, black.
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| 8. | In 1765, he introduced an astronomical instrument fitted with two achromatic lenses.
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| 9. | This lens had the largest aperture of its day for an achromatic lens.
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| 10. | Most are classical Great refractors, which used achromatic doublets on an equatorial mount.
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