Viewfinder Of Telescope, Viewfinder Of Refracting Device Instrument For Land Lunar Or Planetary Observation Of Distant Object, Mag. A Finderscope Is An Aiming Device Used In Astronomy, Typically A Small Auxiliary Telescope Mounted On The Main Astronomical Telescope Along The Same Line Of Sight.

KEYWORDS

aiming amateur architecture astronomer astronomical astronomy astrophysics auxiliary background binoculars black blue camera cctv class destination device digital discovery distant equipment execution finderscope focus helicopter instrument isolated land lens line lunar mag magnification main mounted nature object observation optical photography planetary professional refracting security sight sky small surveillance technology telescope television tripod typically used video view viewfinder white