Atlas Orion 21mm T2 2x vs Sigma 200mm f/2 DG OS Sony E
Atlas Orion 21mm T2 2x vs Sigma 200mm f/2 DG OS Sony E
When comparing Sigma 200mm f/2 DG OS Sony E and Atlas Orion 21mm T2 2x, which one is better?
1. Lens Mount Comparison
The lenses each feature different lens mounts — the Atlas Orion 21mm T2 2x features a Arri PL Mount while the Sigma 200mm f/2 DG OS - Sony E features a Sony E — and because of this the preference varies. If you have a compatible camera, then of course that lens will be a better choice for you.
Winner: Tied — It depends on your gear
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 — this means that you may buy both Atlas Orion 21mm T2 2x and Sigma 200mm f/2 DG OS - Sony E 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
Winner: Atlas Orion 21mm T2 2x
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. Lens Type Comparison
Both lenses are Prime lenses, which means that you can choose both Atlas Orion 21mm T2 2x or Sigma 200mm f/2 DG OS - Sony E 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.
5. Stabilization Comparison
Sigma 200mm f/2 DG OS - Sony E features built-in image stabilization and Atlas Orion 21mm T2 2x does not. Depending on your shooting style, this may be a heavy factor to choose Sigma 200mm f/2 DG OS - Sony E instead of Atlas Orion 21mm T2 2x.
Winner: Sigma 200mm f/2 DG OS Sony E
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.
6. Autofocus Comparison
In regards to autofocus, the winner is Sigma 200mm f/2 DG OS - Sony E since the other lens in this comparison, the Atlas Orion 21mm T2 2x does not have autofocus at all — it is a manual focus lens.
Winner: Sigma 200mm f/2 DG OS Sony E
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.
7. Macro Comparison
Neither Atlas Orion 21mm T2 2x or Sigma 200mm f/2 DG OS - Sony E 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.
8. Weather Seal Comparison
Sigma 200mm f/2 DG OS - Sony E features a weather sealed design while Atlas Orion 21mm T2 2x does not. This means that Sigma 200mm f/2 DG OS - Sony E is a much better choice if you know that you'll use the lens in harsh environments, where moist, rain or dust is present.
Winner: Sigma 200mm f/2 DG OS Sony E
Regarding weather seal: A lens that is weather sealed will perform better over time if you're using the lens in harsh conditions where it's wet or dusty. It may not matter if you're merely using your lens in a studio or in your home.
9. Full Frame Comparison
Sigma 200mm f/2 DG OS - Sony E covers a full frame sensor while Atlas Orion 21mm T2 2x does not. If you have a full frame camera then Sigma 200mm f/2 DG OS - Sony E is the only choice for you in this comparison.
Winner: Sigma 200mm f/2 DG OS Sony E
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 Atlas Orion 21mm T2 2x and Sigma 200mm f/2 DG OS Sony E:
| Atlas Orion 21mm T2 2x | Sigma 200mm f/2 DG OS - Sony E | |
 |  | |
| Brand | Atlas Lens Co. | Sigma |
| Weight | Missing | 1800 g |
| Lens Mount | Arri PL Mount | Sony E |
| Focal Length | 21 mm | 200 mm |
| Largest Aperture | 2 | 2 |
| Anamorphic | Yes | No |
| Anamorphic Squeeze Factor | 2 | Missing |
| Minimum Focus Distance | Missing | 170 cm |
| Type | Prime | Prime |
| Aperture Range | Missing | 2 - 22 |
| Filter Thread Diameter | Missing | 105 |
| Aperture Blades | Missing | 11 |
| Lens Groups | Missing | 14 |
| Lens Elements | Missing | 19 |
| Image Stabilization | No | Yes |
| Autofocus | No | Yes |
| Macro | No | No |
| Weather Seal | No | Yes |
| Full Frame Coverage | No | Yes |
| Lens Hood Included | No | Yes |
| Stabilization Type | Missing | Sigma Optical Stabilizer (OS) |