A second lens that Sony showed at PMA has a more ordinary 28-75mm zoom range, but like the supertelephoto, is designed for full-frame cameras such as Sony's Alpha A900. Such lenses are larger and heavier because they have to produce an image circle big enough to cover a 36x24mm sensor, not just the smaller ones used in mainstream SLRs from Sony and its competitors. The model has a relatively fast f2.8 aperture suitable for low-light shooting, a feature that also increases lens size, weight, and expense.
To the right is the model of a 30mm f2.8 macro lens for close-up shooting. It's designed for smaller-sensor cameras only, Sony said.
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