Aperture 3.4 5


Aperture 1.0


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Aperture 3.4

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 3.6

  1. 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.
  2. 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.
  3. 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.