Newtonian telescope

URI: https://gptkb.org/entity/Newtonian_telescope

GPTKB entity

AI-created image

Statements (52)

Predicate	Object
gptkbp:instanceOf	gptkb:astronomer
gptkbp:advantage	eliminates chromatic aberration
gptkbp:alternativeTo	gptkb:astronomer
gptkbp:commonIn	amateur astronomy
gptkbp:commonMountType	gptkb:Dobsonian_mount gptkb:alt-azimuth_mount equatorial mount
gptkbp:component	gptkb:eye primary mirror secondary mirror focuser optical tube assembly spider (mirror support)
gptkbp:establishedIn	1668
gptkbp:eyepiecePosition	side of the telescope tube
gptkbp:fieldOfView	wide
gptkbp:focalRatioRange	f/4 to f/8
gptkbp:historicalSignificance	first successful reflecting telescope
gptkbp:influenced	gptkb:Dobsonian_telescope modern amateur telescopes
gptkbp:introducedIn	1668
gptkbp:inventedBy	gptkb:Isaac_Newton
gptkbp:lightPath	reflected 90 degrees to the side
gptkbp:limitation	coma aberration at wide fields diffraction spikes from spider vanes open tube design susceptible to dust
gptkbp:maintenance	requires collimation
gptkbp:mirrorAlignment	collimation required
gptkbp:mirrorCoating	aluminum
gptkbp:mirrorMaterial	gptkb:glass
gptkbp:namedAfter	gptkb:Isaac_Newton
gptkbp:notableExample	gptkb:Isaac_Newton's_original_telescope_(Royal_Society,_London)
gptkbp:opticalDesign	reflector
gptkbp:popularApertureRange	4 to 16 inches
gptkbp:primaryMirrorDiameter	parabolic parabolic mirror
gptkbp:purpose	gptkb:astronomer
gptkbp:secondaryMirrorShape	flat
gptkbp:tubeMaterial	gptkb:metal gptkb:plastic gptkb:carbon_fiber
gptkbp:usedFor	astrophotography (with modifications) deep sky observation lunar observation planetary observation
gptkbp:usedIn	observatories backyard astronomy
gptkbp:usesSecondaryMirror	flat diagonal mirror
gptkbp:bfsParent	gptkb:Schmidt–Cassegrain_telescope gptkb:Gregorian_telescopes
gptkbp:bfsLayer	7
https://www.w3.org/2000/01/rdf-schema#label	Newtonian telescope