setting circle

setting circle

[′sed·iŋ ‚sər·kəl]
(engineering)
A coordinate scale on an optical pointing instrument, such as a telescope or surveyor's transit.
References in periodicals archive ?
95), a digital setting circle computer for your telescope.
As such, I can initialize the setting circle at the beginning of an observing session and then point the scope to any object by dialing in the object's right ascension directly on the circle.
Digital setting circles, too, were on display at RTMC in 1978, long before they (and Go To) took over the amateur world.
A distributor will still spend hundreds of thousands of dollars to have one of their vodka brands advertised at a leading rooftop club to gain attention locally, also knowing the broader impact of Beirut's jet setting circles.
In fact an easy way to find the cluster for those using binoculars or telescopes without setting circles or GOTO is to sweep down from epsilon and delta Cas (the left hand side of the W shape of Cassiopeia) and continue for just under half the distance between these two stars.
Most small mounts offered commercially can be fitted with digital setting circles, which will help you locate faint targets.
Caption: Top: The telescope's new mount includes a motor drive, brass fittings, and digital setting circles.
For the majority of observers therefore setting circles or a Go To telescope will be necessary to find it.
It comes with a German equatorial mount, setting circles, slow-motion controls, an aluminum tripod, an accessory tray, and a red-dot (reflex) finder.
Aided by] setting circles, I swung the telescope in the direction of the open star cluster M67 deep in the western twilight.
Most people these days locate it using go-to systems or setting circles, but for star-hoppers wanting a challenge the best starting point is probably mag 3.