What does logos of Sigma lens stand for?

1, APO: refers to the use of ultra-low dispersion (SLD) lenses and ultra-low dispersion (ELD) lenses.

2. This lens belongs to Sima's professional lens series.

3.DG: It refers to a series of reflectors compatible with digital and traditional SLR cameras, that is, both Quan Huafu and APS-C bodies can be used.

4.DC: refers to the digital SLR camera in APS-C format.

5, OS: it is the horse's anti-shake.

6. Macro: It means macro.

7.HSM: It's Yima's ultrasonic motor.

Extended data

Types of SLR lenses

The first is a wide-angle lens. A wide-angle lens in this sense refers to a lens with a focal length below 35mm, such as a lens with a focal length of 28mm, 24mm or even 16mm. Generally speaking, a lens below 24mm is called a super wide-angle lens. The focal length of the lens should be multiplied by 1.5 or 1.6, so for this kind of SLR, 16mm can be considered as a super wide-angle lens.

The second is the standard lens. Generally speaking, the focal length is 50mm or 85 mm, and the lens angle of 50mm is the closest to the human eye, but only because of this, it is difficult to use the pan/tilt well, because it can't take photos that the human eye can't feel like a super wide-angle or macro lens. 85mm lens is generally a portrait lens.

The third type is a medium telephoto lens, generally 100mm or 135 mm, in which 100mm lens is generally a macro lens, and 135mm lens is also a portrait lens, only focusing on the bust, while 85mm is more focused on the portrait of the whole body.

Sigma Official Website-Frequently Asked Questions