Road Train !!!!!!!!!!

by Russell McMahon

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It depends on what you mean by equal quality. A smaller sensor requires less light to be focused on the sensor as the sensor is much smaller, so much smaller lenses can be used while maintaining a roughly equivalent level of resolution on the sensor, but they also gathered far less light, and thus less information as well. The sensor itself is more ...


If you mean cheaper to produce, then yes. But maybe only slightly so as there are many things besides material cost that contribute to the production cost of a lens. A lens designed to throw a smaller image circle has a few advantages: It needs to collect less total light to create the same field density of light on a smaller sensor. This allows a smaller ...


This part of my answer is under the assumption that you mean a 'cheaper' price to the customer. See the bottom for my response developed under the assumption that you mean 'cheaper' to build. Price of any product, including a camera lens, is based on what the market can bear. The cost to produce a product is merely one element that determines a price. ...


It's only the image circle that changes, really. Everything else either remains the same or becomes a bigger problem (for instance, the need for even wider apertures for the same depth of field at the same angle of view and subject distance means that greater degrees of correction will be required for things like coma, spherical and chromatic aberration). (A ...


Lifting the relevant section from another answer of mine: Basically, the larger the aperture is, the larger the angle of light rays on the outside of the lens has to change: Look at the image and imagine that D increases while f stays the same - it should be clear that the light rays then need to "bend" more. And making optics that refract light rays at ...

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