Sigma 90mm f/2.8 DG DN Contemporary (Sony E) vs Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount)
Sigma 90mm f/2.8 DG DN Contemporary (Sony E) vs Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount)
When comparing Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount) and Sigma 90mm f/2.8 DG DN Contemporary (Sony E), which one is better?
1. Lens Mount Comparison
These two lenses use the same lens mount, the Sony E. This means that both lenses are compatible with cameras that use this mount.
Winner: Tied
Regarding lens mount: Popular lens mounts are Canon RF and EF, Micro Four Thirds and Nikon Z. Different lens mounts lets you connect different lenses to camera bodies, but some might not be compatible. This can be helped by using an adapter, like a Canon EF to RF adapter.
2. Largest Aperture Comparison
Both lenses share the same aperture of 2.8 — this means that you may buy both Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) and Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) in this regard; they''re the same.
Winner: Tied
Regarding largest aperture: A lower aperture number means that the widest aperture on the lens is larger. This means that more light will hit the sensor and also that the depth of field will be shallower, better separating your subject from the background.
3. Anamorphic Comparison
Neither Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) or Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) are anamorphic lenses.
Winner: Tied — Neither have this feature
Regarding anamorphic: Anamorphic lenses are usually used on cinema cameras and squeezes the image when its recorded, which gives the final, stretched out, image oval bokeh and a different angle of view. The most common lenses, however, are not anamorphic but spherical, which gives a spherical bokeh and is a much cheaper lens design.
4. Focus Distance Comparison
Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) features a minimum focus distance of 20 cm while Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) has a minimum focus distance of 50 cm. Depending on your shooting style, the Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) might be a better choice.
Winner: Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount)
Regarding minimum focus distance: The minimum focus distance of a lens is the smallest distance from the lens to the subject you want to be in focus; subjects closer than the lens' minimum focus distance will not be in focus. Whether or not this is important to you is up for you to decide, but some want to take close photos and videos and in those cases it's important to have a lens with a low minimum focus distance.
5. Lens Type Comparison
Both lenses are Prime lenses, which means that you can choose both Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) or Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) if you're looking for that type of lens.
Winner: Tied
Regarding type: There are two types of lenses; zoom lenses and prime lenses. Prime lenses have a fixed focal length and cannot be zoomed, while zoom lenses have a focal length range and can be zoomed in to get closer to the subject. Prime lenses are usually lighter, cheaper and let in more light. Zoom lenses are more versatile but are more expensive since they require a more advanced lens design.
6. Stabilization Comparison
Neither Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) or Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) feature built-in image stabilization.
Winner: Tied — Neither have this feature
Regarding image stabilization: When a lens features built-in stabilization, it will actively help you hold the image steady by adjusting the optical elements inside the lens to compensate for movements. Do remember that lens stabilization is not required, but it may be suitable depending on your specific needs.
7. Autofocus Comparison
Both lenses have autofocus, which means that they're both great at focusing targets while taking photographs or filming video. Just remember, most cameras do not offer good autofocus while filming video.
Winner: Tied — both have this feature
Regarding autofocus: Lenses with autofocus help you focus when shooting pictures or video. If a lens only has manual focus it means that you have to focus manually by adjusting the focus wheel on the lens. Most cinema lenses do not use autofocus and are manual focus only.
8. Macro Comparison
Neither Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) or Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) are macro lenses.
Winner: Tied — Neither have this feature
Regarding macro: Macro lenses can focus much closer to your subjects and might be suitable when photographing flowers, insects, wildlife and nature.
9. Full Frame Comparison
Both Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) and Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) cover a full frame sensor and can be used on full frame cameras as well as cameras with smaller sensors.
Winner: Tied — both have this feature
Regarding full frame coverage: All lenses do not cover full frame sensors, but not all cameras are full frame cameras either. If a lens covers a full frame sensor it can be used on all cameras with a matching lens mount, both full frame and crop sensors, except for medium format cameras.
Specifications
Full specifications table of Sigma 90mm f/2.8 DG DN Contemporary (Sony E) and Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount):
| Sigma 90mm f/2.8 DG DN Contemporary - (Sony E) | Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) | |
 |  | |
| Brand | Sigma | Rokinon |
| Weight | 295 g | Missing |
| Lens Mount | Sony E | Sony E |
| Focal Length | 90 mm | 12 mm |
| Largest Aperture | 2.8 | 2.8 |
| Anamorphic | No | No |
| Minimum Focus Distance | 50 cm | 20 cm |
| Type | Prime | Prime |
| Aperture Range | 2.8 - 22 | 2.8 - 22 |
| Filter Thread Diameter | 55 | Missing |
| Lens Groups | 10 | 8 |
| Lens Elements | 11 | 12 |
| Image Stabilization | No | No |
| Autofocus | Evet | Evet |
| Macro | No | No |
| Weather Seal | Missing | No |
| Full Frame Coverage | Yes | Yes |
| Lens Hood Included | Yes | No |