All films behave differently depending on how much light they received during exposure.

Therefore, each film profile in Dehancer Film in fact consists of 3 separate profiles. Each profile is defined by its own sampling conditions:

Exposure correction during shooting is a creative tool that allows you to vary color-contrast look of each film.

In Dehancer Film exposure control is implemented with the Push/Pull (Ev) tool. This parameter allows one to set any exposure continuously between film states within -2 to +2 stops of exposure index (ie, within 5 stops total).

Changes in the Push/Pull setting result in darker or lighter image, changing color and contrast – just like with real film. Film type defines the character of changes.

Classic Push/Pull process initially originates exactly from black and white film behaviour.

Push/Pull was originally designed to control image contrast (rather than brightness, as it is often misunderstood). In order to obtain more contrast, film must be underexposed and overdeveloped. And contrary, in order to get less contrast – overexposure and underdevelopment is needed.

In this case, the image almost does not change its density (‘brightness’, if we talk about viewing the scan on the monitor). That’s because negative exposure index is taken into account when processing the film – so development or printing process is aimed to get normal density.

Color negative is the most commonly used film type.

Its behaviour is similar to that of black and white films, but with less impact to image contrast. Contrarily, color changes are usually more pronounced and therefore provide rich opportunities for different creative tasks.

Color negative photographic films often (but not always) produce more expressed colors when overexposed between 0 and +2 Ev stops.

Color negative movie films, primarily Kodak Vision family, often (but not always) produce more interesting colors when underexposed in range of 0 to -1 steps (sometimes more).

Depending on the scene and lighting conditions, color negatives may produce interesting results for both underexposure (negative Push/Pull values) and overexposure (positive Push/Pull values).

Usually slide film processing is incapable to compensate exposure errors (mistakes or intentional misuse). When printing from slide film (such technologies exist) it is even more difficult to compensate exposure shift, because we are dealing with a ready-to-view picture, that already has high contrast (and this is the meaning of slide film).

Therefore, depending on the exposure method and thus the Push/Pull parameter in the Dehancer Film, slide inevitably becomes darker or lighter.

Image color and contrast changes along with the brightness. As with analogue positive film, excessive slide underexposure usually leads to loss of detail in shadows and excessive overexposure results in flat (clipped) highlights.

In real life, when shooting on color reversible film, a small exposure correction is often made within -1/3 to -1 steps (sometimes more). This guarantees that no highlight details will be lost due to overexposure and additionally produces denser and richer colors.

Black and white slides behave similarly to color ones. Image becomes darker when underexposed and lighter when overexposed. Brightness changes along with contrast.

Similarly, underexposure may result in loss of detail in shadows and overexposure leads to highlights clipping.

Both positive and negative exposure correction is used sometimes as a creative tool, but rarely exceeds -1 / to +1 stops value.