Aperture is fundamental for telescopes. The bigger the light-collecting lens or mirror, the fainter the objects you can see. Double the aperture from 50mm diameter to 100mm diameter, and the light ...
With a 660mm focal length and 100mm aperture, this setup provides ... The tripod legs are extendable to double the overall length. This allows for the telescope to be set to a range of heights ...
González-Payo, J and Caballero, J A 2024. Discovery of double stars by Giovanni Battista Hodierna in 1654. Monthly Notices of the Royal Astronomical Society, Vol. 533, Issue. 3, p. 3379. Modern ...