Photocracy
(The Great Pretender)
02/07/2008 01:48
Miniaturised 4/3rds lenses.

The miniaturised nature of 4/3rds photography is not generally appreciated. Perhaps it would be illuminating to start a 4/3rds lens facts discussion. There are various issues which deserve more attention and here's a few to start. Add more.

4/3rds pictures are not 'cropped' as is so often implied disparagingly. The term cropping implies oversized lenses are used with much of the image being wasted in a larger than sensor image circle. In fact, the image circle of 4/3rds lenses is purposely designed to cover only the sensor and no more.

Enjoy affordable and publishable quality 21.4 x magnification. The standard 14mm-42mm provides a 35mm equivalent of a 28mm lens on a 4/3rds camera. Attaching the 70-300mm lens provides a 35mm (or 'full frame') equivalent of a 600mm lens. From the 14mm starting point, this provides a 21.4 x magnification factor in a size which fits in a very small bag and can easily be carried up hill and down dale.

As a miniaturised format, the same light admitting power or aperture (f number), meaning for the same lens speed, the image produced by the 4/3rds camera lens will have an appreciably greater depth of of field.

(let's get the 82% of jokes out of the way now so they need not divert any discussion).



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