|Ilford Mark V Motion Picture Film|
|Top: Ilford Mark V perforations. Bottom: HP5 Plus|
For a first test, I shot a roll of Mk V with successive exposures at 400, 200, 100, 50, and 25 EI, and then stand developed the film in Rodinal diluted 1:100 for an hour, to give me a rough guide to exposure to make further tests with.
|Contact sheet of Ilford Mk V test roll|
|Ilford Mk V, shot at 25 EI|
|Ilford Mk V, shot at 50 EI|
|Mk V film, 32 EI, developed 6m30s in Rodinal 1:25|
|Mk V film, 25 EI, developed 8m45s in Rodinal 1:25|
This film has fine grain and wide exposure latitude. These characteristics, together with its high speed, make the film suitable for the production of pictures of very high quality under a wide variety of lighting conditions. Newsreel photography in poor light, filming at night and television work generally are situations in which this film is particularly useful. In the studio the high speed of the film makes great depth of field possible without the need for exceptionally powerful lighting units.The information sheet provides the original speed ratings, two of which are given: a 'daylight average' of 250 ASA and a 'minimum' of 500 (ratings for tungsten lighting are given as 200 and 400 respectively). Under 'Special Development Techniques' it also mentions Microphen for push processing for speeds up to 1300, although it gives no development times.
Two speed ratings are quoted. The minimum exposure rating is recommended when it is necessary to achieve the maximum film speed and image quality, but this is only possible when the processing conditions are strictly related to the exposure conditions. The average exposure ensures image quality of a very high order in a wide range of exposure and processing conditions.
|Sensitometric curves when developed in ID11 at 20ºC (continuous agitation).|
From Technical Information Sheet A50.7
I wouldn't want to be prescriptive about appropriate uses of different types of film: the grain of Mark V is more pronounced than that of modern 400 speed films, and so the choice of subject matter is a consideration when using this film. The grain can appear disruptively prominent in the skies of landscape shots, but from the results of the rolls I've developed so far the subjects that work best with Mark V film, in the examples below, are those such as the dim station interior or the photograph of Dagenham Brook in fading light.
|Mk V film, 50 EI, stand developed in Rodinal 1:100 for 1 hour|
|Mk V film, rated 50 EI, stand developed in Rodinal 1:150 for 3 hours|
|Ilford Mk V, 50 EI, stand developed in Rodinal 1:150 for 3 hours|
|Ilford Mk V, 32 EI, developed in Rodinal 1:25 for 8m45s|
Silver by the Ton - A History of Ilford Limited 1879-1979, RJ Hercock and GA Jones
Ilford Technical Information Book Volume 1
Labeauratoire (with which I am in no way affiliated) is currently selling Mark V with an expiry date of 1979. Their recommendation is 400 or 200 ISO, which suggests their film was kept better than my stock.