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Message: <blockquote data-quote="BF Hammer" data-source="post: 844601" data-attributes="member: 48483">Focal length is an absolute value and is not adjusted for sensor size. The answer you are looking for is no.The focal length describes the size of the image projected on the plane of the sensor or film. But the size of that sensor or film stock can range from tiny to huge. We have settled on crop factor to describe the slice of the image you will record. Full frame 35mm became the arbitrary reference size by historic popularity. In film large-format, a 100mm lens is actually close to a normal field of view.Edit: Don't take that to mean you could use a DX lens to shoot on a Hasselblad medium format. Lens construction means the light is projected in a narrow beam. Like looking through a straw versus peering through the middle of a donut.</blockquote>