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Thanks for the replies! I am considering a 5' f/9.5 achromat. I have an 80 mm f/15 that is nice but doesn't show too much detail and isn't very bright on Saturn. Looking at Jupiter through it at around 75-100x I can make out 3-4 cloud bands and the Galilean moons, but the cloud bands run together and it seems kind of blurry, even in the best focus.
- Aperture This figure is the most straightforward – the aperture is the diameter of a telescope’s main lens or mirror, measured in millimetres and commonly converted into inches. This number describes how much ‘light grasp’ a telescope has, by which we mean how many photons it can collect.
- What is aperture in photography? Aperture refers to the opening of a lens's diaphragm through which light passes. It is calibrated in f/stops and is generally written as numbers such as 1.4, 2, 2.8, 4, 5.6, 8, 11 and 16.
- Aputure Cinematography Gear and Content By Filmmakers, For Filmmakers Join the A-Team: www.aputure.com Aputure was founded in 2005 by a team of inspired photographers and filmmakers who wanted to.