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Shutter speed is the duration that the camera's shutter is open, exposing light to the film or sensor. It influences motion blur and exposure.

ISO indicates the film's sensitivity to light. A higher ISO number means higher sensitivity but also more film grain.

Pull processing is the technique of underdeveloping film, which reduces the effective sensitivity and contrast of the film, possibly to compensate for overexposed shots.

A light meter is a device used to measure the amount of light. In photography, it helps determine the correct exposure, using aperture, shutter speed, and ISO.

Grain refers to the visible particles of metallic silver on film, which contribute to the texture and detail of a photographic print. More grain means a looser emulsion and generally higher sensitivity (ISO).

Push processing is a technique that involves developing film for longer times or at higher temperatures to increase the effective sensitivity of the film, useful in low-light conditions.

Film speed is the measure of a photographic film's sensitivity to light, denoted by ISO numbers such as ISO 100, 400, or 800.

Hypo, short for sodium thiosulfate, is a chemical used as a photographic fixer to dissolve unexposed silver halides from the film or paper, making the image permanent.

An enlarger is a photographic tool used in the darkroom to project the image from a negative onto photographic paper, enlarging the image in the process.

Dodging is a darkroom technique used to lighten an area of the print, involving reducing exposure for the area to be lightened during the printing process.

A developing tank is a lightproof container used in film processing. It allows the film to be developed in chemicals without exposure to light.

Aperture refers to the opening in the lens diaphragm that controls the amount of light entering the camera. It is measured in f-stops, and influences depth of field.

Contrast filters are used in black and white printing to adjust the contrast of the print. They work by varying the spectrum of light hitting the photographic paper.

An SLR camera uses a mirror and prism system to allow photographers to see through the lens and get an exact preview of the frame before taking the photo.

Stopping down means reducing the aperture size (increasing the f-stop number), which increases depth of field, reduces the amount of light entering the lens, and potentially increases sharpness.

A rangefinder is a type of camera that determines the distance to the subject and facilitates focusing. It uses a dual-image range finding device.

Emulsion refers to the light-sensitive layer of material, such as silver halide crystals, coated onto photographic film or paper.

Depth of field is the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image. It's controlled by aperture, focal length, and focus distance.

Burning is a darkroom technique used to darken an area of the print, by giving additional exposure to the area intended to be darkened during the printing process.