Sigma 40mm T1.5 FF (Sony E) vs Samyang AF 35mm F1.4 FE II (Sony E)
Sigma 40mm T1.5 FF (Sony E) vs Samyang AF 35mm F1.4 FE II (Sony E)
When comparing Samyang AF 35mm F1.4 FE II (Sony E) and Sigma 40mm T1.5 FF (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
The Samyang AF 35mm F1.4 FE II - (Sony E) has the largest aperture of the two lenses at 1.4 compared to the 1.5 aperture of Sigma 40mm T1.5 FF - (Sony E). This means that you get more light to your sensor using Samyang AF 35mm F1.4 FE II - (Sony E) wide open, and therefore it might be a better lens in dark situations.
Winner: Samyang AF 35mm F1.4 FE II (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 Samyang AF 35mm F1.4 FE II - (Sony E) or Sigma 40mm T1.5 FF - (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. Lens Type Comparison
Both lenses are Prime lenses, which means that you can choose both Sigma 40mm T1.5 FF - (Sony E) or Samyang AF 35mm F1.4 FE II - (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. Filter Thread Comparison
The Sigma 40mm T1.5 FF - (Sony E) feature a filter thread diameter of 82 mm while Samyang AF 35mm F1.4 FE II - (Sony E) feature a diameter of 67 mm. Depending on your current gear (like other lenses or filters) one of them might be favorable over the other.
Winner: Tied — It depends on your gear
Regarding filter thread diameter: The filter thread diameter is the size of which the lens is compatible with screw-on filters, such as CPL, ND or IR filters. If you have several lenses of a certain size, it might be a good idea to keep the same filter thread size to make sure your filters work on all your lenses. If not, then you may buy step up rings to adapt from a certain diameter to the filter thread diameter of your other lenses.
6. Stabilization Comparison
Sigma 40mm T1.5 FF - (Sony E) features built-in image stabilization and Samyang AF 35mm F1.4 FE II - (Sony E) does not. Depending on your shooting style, this may be a heavy factor to choose Sigma 40mm T1.5 FF - (Sony E) instead of Samyang AF 35mm F1.4 FE II - (Sony E).
Winner: Sigma 40mm T1.5 FF (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.
7. Autofocus Comparison
In regards to autofocus, the winner is Samyang AF 35mm F1.4 FE II - (Sony E) since the other lens in this comparison, the Sigma 40mm T1.5 FF - (Sony E) does not have autofocus at all — it is a manual focus lens.
Winner: Samyang AF 35mm F1.4 FE II (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.
8. Full Frame Comparison
Both Samyang AF 35mm F1.4 FE II - (Sony E) and Sigma 40mm T1.5 FF - (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 40mm T1.5 FF (Sony E) and Samyang AF 35mm F1.4 FE II (Sony E):
| Sigma 40mm T1.5 FF - (Sony E) | Samyang AF 35mm F1.4 FE II - (Sony E) | |
 |  | |
| Brand | Sigma | Samyang |
| Weight | 1620 g | Missing |
| Lens Mount | Sony E | Sony E |
| Focal Length | 40 mm | 35 mm |
| Largest Aperture | 1.5 | 1.4 |
| Anamorphic | No | No |
| Minimum Focus Distance | 40 cm | Missing |
| Type | Prime | Prime |
| Aperture Range | 1.5 - 16 | 1.4 - 16 |
| Filter Thread Diameter | 82 | 67 |
| Lens Groups | Missing | 9 |
| Lens Elements | Missing | 11 |
| Image Stabilization | Yes | No |
| Autofocus | Hayır | Evet |
| Macro | No | Missing |
| Weather Seal | Yes | Missing |
| Full Frame Coverage | Yes | Yes |
| Lens Hood Included | No | Missing |