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briantilley

Paignton, UK
29761 posts

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"RE: Standard f-Stops"

briantilley Moderator Deep knowledge of bodies and lens; high level photography skills Donor Ribbon awarded for his support to the Fundraising Campaign 2014 Nikonian since 26th Jan 2003
Sun 10-Mar-13 08:42 AM

Welcome to Nikonians

Successive f/stop values do indeed represent a halving (or doubling) of the area of the lens' diaphragm opening, and therefore a corresponding difference in the amount of light transmitted. That's assuming that the lens is correctly adjusted, of course

The standard numbering sequence is:

1 - 1.4 - 2 - 2.8 - 4 - 5.6 - 8 - 11 - 16 - 22 - 32 - 45

The "odd" numbers in the sequence (1.4, 2.8...) have always been rounded for convenience.

Brian
Welsh Nikonian

A general, generic topic Standard f-Stops [View all] , dperry23 , Sun 10-Mar-13 04:24 AM
Subject Author Message Date ID
Reply message RE: Standard f-Stops briantilley Moderator Deep knowledge of bodies and lens; high level photography skills Donor Ribbon awarded for his support to the Fundraising Campaign 2014
10th Mar 2013
1
Reply message RE: Standard f-Stops dperry23
10th Mar 2013
2
     Reply message RE: Standard f-Stops briantilley Moderator Deep knowledge of bodies and lens; high level photography skills Donor Ribbon awarded for his support to the Fundraising Campaign 2014
10th Mar 2013
3
Reply message RE: Standard f-Stops jrp Administrator JRP is one of the co-founders, has in-depth knowledge in various areas. Awarded for his contributions for the Resources
10th Mar 2013
4
Reply message RE: Standard f-Stops Digital_Reality
20th Mar 2013
5
     Reply message RE: Standard f-Stops JosephK Silver Member Fellow Ribbon awarded for his excellent and frequent contributions and sharing his in-depth knowledge and experience with the community in the Nikonians spirit.
20th Mar 2013
6
          Reply message RE: Standard f-Stops Broadway Bob Gold Member Donor Ribbon awarded for his generous support to the Fundraising Campaign 2014warded for
21st Mar 2013
7