Film Technical
Exposure Latitude vs. Dynamic Range
A dynamic range of 13 stops will have exposure latitude of +/- 6.5 stops, is it true?
Film Technical
Graininess and Sharpness
The two characteristics of Image Structure are grain and sharpness. There are two ways of evaluating these characteristics –subjectively (by looking at them) and objectively (by measuring them with a suitable instrument). It’s rather like the way we look at the tones and contrast of an image, and measure them with a densitometer.
Film Technical
Color Reproduction in Color Negative Film
Problems in Color Reproduction Ideal dyes are required for high color fidelity Real dyes are not ideal – cross-talk Color correction is required Masking using colored couplers Interimage effects using image-modifying couplers In order to achieve high color fidelity we would like to have ideal dyes. Ideal dyes absorb only Read more…
Film Film Processing Technical
Image Formation and Film Processing
Let’s now discuss how the image is formed in a photographic emulsion.
Film Technical
Film Structure V – Exposure Latitude
Exposure latitude is the ability to continuously and faithfully discriminate differences in exposure intensity such that the full tonal range of the original scene may be reproduced Wide exposure latitude also provides greater safety factor for both deliberate and accidental over- and underexposure The use of multiple emulsion layers results Read more…
Film Technical
Film Structure IV – Sensitometry
The word “sensitometry” is derived from two Latin words meaning “sensitivity” and “measurement”. It is the science of measuring how photographic emulsions respond to exposure and processing.
