Disambiguation evidence for Barlow lenses via surface form

"Barlow lens"


As subject (48)

Triples where this entity appears as subject under the label "Barlow lens".

Predicate Object
alters light path before it reaches the eyepiece
canBePlaced in front of a camera adapter for astrophotography
canBeUsedWith double star observing
canBeUsedWith lunar imaging
canBeUsedWith planetary imaging
canBeUsedWith solar observing with proper solar filters
canBeUsedWith visual observing
compatibleWith catadioptric telescopes
compatibleWith reflecting telescopes
compatibleWith refracting telescopes
differsFrom telecompressor (focal reducer)
hasAdvantage can improve edge performance of some eyepieces
hasAdvantage reduces need to buy many short focal length eyepieces
hasComponent eyepiece holder
hasComponent lens barrel
hasComponent negative lens group at the front
hasComponent telescope-side barrel
hasDisadvantage adds more glass elements in the optical path
hasDisadvantage can introduce vignetting with some eyepieces
hasDisadvantage can magnify optical aberrations of the telescope or eyepiece
hasDisadvantage can reduce image brightness at high magnifications
hasEffect allows use of longer focal length eyepieces to achieve high magnification
hasEffect increases effective focal ratio (f-number) of the telescope
hasEffect increases eye relief for many eyepieces
hasEffect reduces field of view for a given eyepiece
hasEffect spreads light over a larger image scale
hasOpticalDesign negative (diverging) lens group
historicalPeriod 19th century origin
instanceOf diverging lens
instanceOf optical accessory
instanceOf telescope accessory
mayInclude compression ring eyepiece clamp
mayInclude filter threads
mayInclude removable lens cell
mountStandard 1.25-inch barrel
mountStandard 2-inch barrel
namedAfter Peter Barlow NERFINISHED
placed between telescope focuser and eyepiece
relatedTo telecentric amplifier
typicalMagnificationFactor 1.5x
typicalMagnificationFactor 2x
typicalMagnificationFactor 3x
typicalMagnificationFactor 5x
usedBy amateur astronomers
usedBy professional astronomers
usedFor increasing effective focal length of a telescope
usedFor increasing magnification of a telescope-eyepiece combination
usedIn telescope