Crop Factor

Technology / Digital Cameras / Crop Factor: If you own a digital SLR camera, you may have heard of crop factor, or focal length multiplier. Basically, crop factor determines how telephoto or wide angle your lenses appears to be when they're mounted to a digital SLR camera, as opposed to a traditional 35mm film camera. That's because the image sensor on most dSLRs is smaller than a full frame of 35mm film, and when you look through the viewfinder of a DSLR camera you see what your image sensor sees. To find the effective focal length of a lens mounted to an SLR, you multiply its actual focal length by your cam's crop factor. For example, a 70-300mm lens, x 1.5 crop factor, will seem like a 105-450mm lens on your DSLR. Most digital SLRs have a crop factor of 1.5 or 1.6, but different camera brands and models have different-sized sensors, and that will affect each camera's exact crop factor. Full-frame digital SLRs use image sensors that are the same size as a frame of 35mm film, and therefore have no crop factor.

Other Words for Factor

Factor Adjective Synonyms: constituent, ingredient, element, part, particular, piece, component, circumstance, consideration, aspect, fact, influence, determinant, cause

Oilseed Crops

Business / Agriculture / Oilseed Crops: Primarily soybeans, sunflower seed, canola, rapeseed, safflower, flaxseed, mustard seed, peanuts and cottonseed, used for the production of cooking oils, protein meals for livestock, and industrial us MORE

Old Crop

Life Style / Coffee / Old Crop: Coffee that has been held in warehouses before shipping. Old crop differs from aged or vintage and mature coffees in two ways: First, it has not been held for as long a period, and second, it may not MORE

Obliquity Factor

Science / Tides and Currents / Obliquity Factor: A factor in an expression for a constituent tide (or tidal current) involving the angle of the inclination of the Moon's orbit to the plane of the Earth's Equator. MORE