16 pages matching Sky & Telescope in this book
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Atmosphere seeing magnification and eyepieces
Telescope hardware and adjustments
15 other sections not shown
aberration accurate adjustment allow antenna aperture apparent field appear arcseconds asteroids astrophotography atmosphere Barlow lens brightness British Astronomical Association camera lens Cassegrain Cassegrain reflector celestial centre Chapter Collimating colour comet comparison stars crosswires dark diagram diameter diffraction diffraction grating disc distance double stars drawing drawtube effective focal electrons emulsion equation equipment eyepiece field of view film filter focal length focal plane focal ratio focus focusing given image scale Jupiter Kodak latitude lenses light lines longitude lunar magnification magnitude measured meteors micrometer millimetre minute exposure Moon mounted nebulae negative Newtonian reflector nova object glass observation Observatory optical axis photocathode photographs photometer planet planetary primary mirror prism produce radio rays record refractor resolution ring rotation secondary mirror seen shows Sky & Telescope slit solar spectra spectrum star images Sun's sunspot surface telescope tube telescope's usually variable star visible visual wavelength