Geography is a mostly fixed lens, a constant that lets you trace seamless stories across time.

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Additional lenses can be attached via the Lenscaster to create a wider field of view or bring telephoto capabilities to the iPad's fixed lens.

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He used a DSLR camera and a 300mm fixed lens.

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This upgraded, high-resolution, compact digital camera with a fixed lens is named in honor of Richard "Dick" Merrill, the co-creator of the Foveon X3 Direct Image Sensor technology that powers Sigma's unique lineup of cameras.

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Framing with a fixed lens is incredibly challenging, and while I was up to the task, as a casual photographer, I can't say it enriched my experience enough to warrant unloading an extra two grand of hard-earned cash.

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Accommodating a 35mm sensor, the same chip that ships in Sony's a99 DSLR, in such a small housing meant going with a fixed 35mm lens.

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In addition to daily use as a "pan-focus" lens featuring a wide angle, fixed f8 aperture and shallow depth of field, it is compatible with manual focusing using a lever and capable of close-up shooting as close as 30 cm.

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Offering a fixed 50mm focal length and extra-bright F1.4 aperture, the premium lens is an ideal choice for quality-critical portraiture and low-light shooting.

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