Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount) vs Irix 45mm T1.5 Sony E
Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount) vs Irix 45mm T1.5 Sony E
When comparing Irix 45mm T1.5 Sony E and Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount), 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
The Irix 45mm T1.5 - Sony E has the largest aperture of the two lenses at 1.5 compared to the 2.8 aperture of Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount). This means that you get more light to your sensor using Irix 45mm T1.5 - Sony E wide open, and therefore it might be a better lens in dark situations.
Winner: Irix 45mm T1.5 Sony E
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 Irix 45mm T1.5 - Sony E or Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) 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. Stabilization Comparison
Neither Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) or Irix 45mm T1.5 - Sony E 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.
5. Autofocus Comparison
In regards to autofocus, the winner is Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) since the other lens in this comparison, the Irix 45mm T1.5 - Sony E does not have autofocus at all — it is a manual focus lens.
Winner: Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount)
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.
6. Macro Comparison
Neither Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) or Irix 45mm T1.5 - 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.
7. Weather Seal Comparison
Irix 45mm T1.5 - Sony E features a weather sealed design while Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) does not. This means that Irix 45mm T1.5 - 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: Irix 45mm T1.5 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.
8. Full Frame Comparison
Both Irix 45mm T1.5 - Sony E and Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) 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 Rokinon 12mm F2.8 ED AS NCS Fish-eye (Sony E Mount) and Irix 45mm T1.5 Sony E:
| Rokinon 12mm F2.8 ED AS NCS Fish-eye - (Sony E Mount) | Irix 45mm T1.5 - Sony E | |
 |  | |
| Brand | Rokinon | Irix |
| Weight | Missing | 1100 g |
| Lens Mount | Sony E | Sony E |
| Focal Length | 12 mm | 45 mm |
| Largest Aperture | 2.8 | 1.5 |
| Anamorphic | No | No |
| Minimum Focus Distance | 20 cm | Missing |
| Type | Prime | Missing |
| Aperture Range | 2.8 - 22 | 1.5 - 22 |
| Filter Thread Diameter | Missing | 86 |
| Lens Front Diameter (Not Filter Thread) | Missing | 95 mm |
| Aperture Blades | Missing | 9 |
| Lens Groups | 8 | 9 |
| Lens Elements | 12 | 11 |
| Image Stabilization | No | No |
| Autofocus | Evet | Hayır |
| Macro | No | No |
| Weather Seal | No | Yes |
| Full Frame Coverage | Yes | Yes |
| Lens Hood Included | No | No |