What does DC mean in a Sigma lens?

Since 1961, Sigma has designed and manufactured lenses, flashes, cameras and other accessories for the photographic market. Recent lens designs include the DG series, DC series and the hypersonic motor series. The DC series is designed by Sigma specifically for today’s APS-C sized image sensors, found in digital SLR cameras. From the moment of publication, the DC line consists of 19 lenses that vary in focal length from 4.5 to 250 mm. Five of these lenses are no longer manufactured.

Since 1961, Sigma has designed and manufactured lenses, flashes, cameras and other accessories for the photographic market. Recent lens designs include the DG series, DC series and the hypersonic motor series. The DC series is designed by Sigma specifically for today’s APS-C sized image sensors, found in digital SLR cameras. From the moment of publication, the DC line consists of 19 lenses that vary in focal length from 4.5 to 250 mm. Five of these lenses are no longer manufactured.

Fixed focal length DC

Fixed focal length lenses are often used by work professionals who require higher image quality and resolution than what is found in magnifying lenses. Fixed lenses are often referred to as the main lenses, although the cousins ​​actually represent the normal lens of the focal length for a given film format. For the APS-C format camera, Sigma manufactures three models – the Fisheye circular 4.5 mm f / 2.8 EX DC HSM, the Fisheye 10 mm f / 2.8 EX DC HSM and the 30 mm f / 1.4 EX DC HSM.

Compatibility of the DC lens

DC Sigma lenses are compatible with most digital SLR cameras. Not all lenses are fully compatible with each brand and model. The DCs are with Sigma, Canon, Nikon, Konica / Minolta, Sony, Pentax, Kodak, Fujifilm, Olympus, Panasonic and Leica cameras. These are not compatible with 35 mm films or with full frame digital SLR cameras.

The lens DC vs. DG

While both lens lines are compatible with digital cameras, the DG lens line offers wide aperture, and wide angles with minimal focal distance. Unlike DC lenses, DGs are also compatible with DSLR full frame cameras and 35mm film cameras.

The APS-C vs the full frames

The APS-C sensors, which are used in many digital SLR cameras, are compact or those without full frames. A full frame sensor measures the same size as a full frame of 35mm film, or 36mm wide and 24mm high. The compact or APS-C size are smaller than one full frame of 35 mm film. When using a camera with a compact sensor, the focal length of the lens is multiplied by something called the clipping factor. For example, when you use the Sigma 30mm f / 1.4 EX DC HSM lens in a camera with an APS-C sensor that has a clipping factor of 1.6x, the focal length of 30mm has an equivalent field of view of a 48 mm lens in a standard full frame camera.

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