A table has been prepared to describe log exposure times a constant directly from transmittance values. This expression of exposure may be used to prepare working curves or corrected to relative log exposure by first determining the γ of the photographic emulsion. A method for determining γ from the table is also described.
Get full access to this article
View all access options for this article.
References
1.
HughesH. K.MurphyR. W. —J. Opt. Soc. Am., 39, 501 (1949).
2.
VerkerkB. —J. Opt. Soc. Am., 41, 1017 (1951).
3.
FeldmanC. — ASTM,E-2,II report on Photographic Photometry, Oct. 26, 1950.