Articles liés à Unit Photography (Classic Reprint)
Synopsis
The digital edition of all books may be viewed on our website before purchase. Excerpt from Unit Photography (Classic Reprint)
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Forgotten Books publishes hundreds of thousands of rare and classic books.
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value.The digital edition of all books may be viewed on our website before purchase.
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Unit Photography (Classic Reprint)
impression à la demandeVendeur : Forgotten Books, London, Royaume-Uni
Évaluation du vendeur 5 sur 5 étoiles
Paperback. Etat : New. Print on Demand. This book introduces a new physical quantity called actinism, a scientific term for the chemical change induced by radiation at a point. It is a unit of measurement for the strength of light from any source, whether the sun, sky, flame, or any other visible surface in nature. It refers to this quality as 'photographic intensity' and explains that each surface has an actinic value that can be measured in simple numbers. Understanding this property is fundamental to comprehending the practice of photography. The book also discusses the 'element of time' in photographic exposure, explaining the importance of counting time correctly when shooting. It introduces a new method for counting seconds accurately and emphasizes the need for reliable photographic shutters. The author presents a 'unit diaphragm scale' for evaluating and using lenses and shutters. This scale simplifies exposure problems by using a geometric series of cone values starting with that of f/64 as unity. It also introduces the concept of the 'unit actinometer,' a box-like arrangement used to measure the actinic value of light sources. The book delves into 'unit actinometry,' a system for measuring the photographic intensity of light and lighted surfaces. It defines the 'least visible tint' and the 'first appearance time,' which are crucial for determining exposure times. It also explains the concept of the absolute actinic unit and the use of standard tinting mediums for actinic measurements. Overall, this book provides a structured and scientific approach to photography, focusing on understanding the relationship between actinism, time, and diaphragm systems. It aims to establish a rational foundation for photographic practice and make the medium accessible to practitioners of all levels. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. N° de réf. du vendeur 9781331951919_0
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EUR 18,43
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Expédition depuis Royaume-Uni vers Etats-Unis
Expédition depuis Royaume-Uni vers Etats-Unis
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Unit Photography Classic Reprint
Vendeur : PBShop.store US, Wood Dale, IL, Etats-Unis
Évaluation du vendeur 5 sur 5 étoiles
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781331951919
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EUR 28,91
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Expédition nationale : Etats-Unis
Expédition nationale : Etats-Unis
Quantité disponible : 15 disponible(s)
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Unit Photography Classic Reprint
Vendeur : PBShop.store UK, Fairford, GLOS, Royaume-Uni
Évaluation du vendeur 5 sur 5 étoiles
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781331951919
Acheter neuf
EUR 27,65
Expédition à EUR 4,86
Expédition depuis Royaume-Uni vers Etats-Unis
Expédition depuis Royaume-Uni vers Etats-Unis
Quantité disponible : 15 disponible(s)