My instrument was an 11-cm f/8 Newtonian reflector
on an alt-azimuth mount.
The Newtonian reflector
, named after its inventor Isaac Newton, was first built around 1670 and is a common type still used today.
Alim Abdulmuhmin Mujahid, executive director of the Regional Dharul Ifta (House of Opinion) in the Autonomous Region in Muslim Mindanao (RDI-ARMM) said his office has provided a set of Newtonian reflector
telescope to each of their five provincial offices in the region, as well as to the Dharul Ifta of ulama (scholars) in Zamboanga Peninsula to aid in the moon sighting.
He started with a very simple 76-mm Newtonian reflector
Drawing inspiration from classic Newtonian reflector
telescope designs, both Cometron telescopes combine Celestron's legendary optics with easy-to-use mounts that beginners will have set up and pointing to objects in no time:
At the observatory we were set up with a 100mm refractor with a solar filter, a 150mm Newtonian reflector
and a small Coronado PST solar telescope.
The Centre has two telescopes--an 11-inch Dobsonian donated by Dudley Field and a 13-inch equatorially fork mounted Newtonian reflector
built and donated by club member Steve Kleyn.
Peering through a black, cannon-like telescope called a Newtonian Reflector
, Edward Sanchez, 10, and Mark Laporte, 11, observed Jupiter and three of its moons.
Couched in the Solstice Peak Observatory, which he built himself, high in the Santa Monica mountains, he spends hours gazing into space through a ten-inch f/8 Newtonian reflector
telescope and sketching what he sees.
and told him his own telescope was a15 inch Newtonian reflector
The real dilemma came when I installed the camera on my 12 1/2-inch f/4 Newtonian reflector