Save $145 on an excellent computerized telescope that features a large 130mm aperture, a database of over 4,000 nebulas, stars and galaxies, two eyepieces, an accessory tray, a tripod and a ...

Save 32% on binoculars that we think are the best for moon views. The large aperture and objective lens allow lots of light in for a clear viewing experience while the 15x magnification makes ...

It has an integral field unit and a set of robots for multi-object spectroscopy at the telescope focal plane ... There are 73 optical elements of large aperture and high precision manufactured in ...

However, simultaneous achievement of a large aperture (near 1 inch) and wide field of view (greater than 60°) meta-optics based eyepiece is a difficult task that has not yet been demonstrated.