Search
×
FR

Placeholder headline

This is just a placeholder headline

API MPMS CH 10.8, 3rd Edition: Standard Test Method for Sediment in Crude Oil by Membrane Filtration

$

114

BUY NOW

Placeholder headline

This is just a placeholder headline

ISO/TR 42505:2026 Sharing economy — Shared manufacturing — Concepts and models

$

192

BUY NOW

Placeholder headline

This is just a placeholder headline

ISO 4306-1:2026 Cranes — Vocabulary — Part 1: General

$

436

BUY NOW

ISO 517:2008

ISO 517:2008 Photography – Apertures and related properties pertaining to photographic lenses – Designations and measurements

CDN $131.00

SKU: 3de0146c94d6 Categories: ,

Description

ISO 517:2008 pertains to apertures and related properties of photographic lenses affecting the illuminance at the centre of the image.

ISO 517:2008 specifies aperture markings for all types of lenses used in still cameras, and gives tolerances for the stop numbers. It also defines aperture stop, entrance pupil, focal length, relative aperture and stop numbers, and gives methods for their measurement or determination.

ISO 517:2008 applies only to lenses focused on objects at infinity; that is, at least 50 times the focal length of the lens.

Edition

3

Published Date

2008-03-10

Status

PUBLISHED

Pages

8

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

ISO 517:2008 pertains to apertures and related properties of photographic lenses affecting the illuminance at the centre of the image.

ISO 517:2008 specifies aperture markings for all types of lenses used in still cameras, and gives tolerances for the stop numbers. It also defines aperture stop, entrance pupil, focal length, relative aperture and stop numbers, and gives methods for their measurement or determination.

ISO 517:2008 applies only to lenses focused on objects at infinity; that is, at least 50 times the focal length of the lens.

Previous Editions

Can’t find what you are looking for?

Please contact us at: