Arri Master Prime 40mm T1.3 vs Atlas Orion 21mm T2 2x
Arri Master Prime 40mm T1.3 vs Atlas Orion 21mm T2 2x
When comparing Atlas Orion 21mm T2 2x and Arri Master Prime 40mm T1.3, which one is better?
1. Lens Mount Comparison
These two lenses use the same lens mount, the Arri PL Mount. 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
The Arri Master Prime 40mm T1.3 has the largest aperture of the two lenses at 1.3 compared to the 2 aperture of Atlas Orion 21mm T2 2x. This means that you get more light to your sensor using Arri Master Prime 40mm T1.3 wide open, and therefore it might be a better lens in dark situations.
Winner: Arri Master Prime 40mm T1.3
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 Arri Master Prime 40mm T1.3 or Atlas Orion 21mm T2 2x 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
Neither Arri Master Prime 40mm T1.3 or Atlas Orion 21mm T2 2x 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.
6. Autofocus Comparison
None of the lenses have an autofocus feature, which means that both lenses are manual focus lenses.
Winner: Tied — Neither 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.
7. Macro Comparison
Neither Arri Master Prime 40mm T1.3 or Atlas Orion 21mm T2 2x 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. Full Frame Comparison
Neither Atlas Orion 21mm T2 2x or Arri Master Prime 40mm T1.3 cover a full frame sensor, which means that if you have a full frame camera, neither lens will be compatible with your camera.
Winner: Tied — Neither 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 Arri Master Prime 40mm T1.3 and Atlas Orion 21mm T2 2x:
| Arri Master Prime 40mm T1.3 | Atlas Orion 21mm T2 2x | |
 |  | |
| Brand | Arri | Atlas Lens Co. |
| Lens Mount | Arri PL Mount | Arri PL Mount |
| Focal Length | 40 mm | 21 mm |
| Largest Aperture | 1.3 | 2 |
| Anamorphic | No | Yes |
| Anamorphic Squeeze Factor | Missing | 2 |
| Type | Prime | Prime |
| Lens Front Diameter (Not Filter Thread) | 114 mm | Missing |
| Image Stabilization | No | No |
| Autofocus | Hayır | Hayır |
| Macro | No | No |
| Weather Seal | Missing | No |
| Full Frame Coverage | No | No |
| Lens Hood Included | Missing | No |