http://www.dkimages.com …previews/975/40020174.JPG![]()
that's a good image of a 35mm camera (a rather old one) with film loaded. Describing a camera as "35mm" distinguishes it from a camera that uses other film formats, such as medium or large format (which use film that is typically 6cm x 4.5cm, 6cm x 6cm or 6cm x 7cm or some variation thereon for medium, and film that is 4" x 5 " for large format). The Kodak product number for 35mm film is 135, for medium format it's 120. These numbers are often used to indicate the size of the film you're looking for.
This relates to digital in several ways. A 35mm dSLR is a digital SLR based upon a 35mm camera system. It uses a sensor that is at the largest the size of a piece of 35mm film, and work with 35mm film lenses. (For example, the Canon EOS system compromises a collection of lenses as well as both film and digital 35mm based cameras. )
A medium format digital camera is a camera that uses a medium format system as a basis, using much larger sensors and lenses. (and allowing for much higher (up into the 30 megapixel and higher range) resolution.


