When comparing Canon EF 200mm f/2.8L II USM and Tokina Vista Prime 18mm T.15 EF, which one is better?
These two lenses use the same lens mount, the Canon EF. 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.
The Tokina Vista Prime 18mm T.15 EF has the largest aperture of the two lenses at 1.5 compared to the 2.8 aperture of Canon EF 200mm f/2.8L II USM. This means that you get more light to your sensor using Tokina Vista Prime 18mm T.15 EF wide open, and therefore it might be a better lens in dark situations.
Winner: Tokina Vista Prime 18mm T.15 EF
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.
Both lenses are Prime lenses, which means that you can choose both Tokina Vista Prime 18mm T.15 EF or Canon EF 200mm f/2.8L II USM 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.
Full specifications table of Tokina Vista Prime 18mm T.15 EF and Canon EF 200mm f/2.8L II USM:
| Tokina Vista Prime 18mm T.15 EF | Canon EF 200mm f/2.8L II USM | |
 |  | |
| Brand | Tokina | Canon |
| Weight | 2760 g | Missing |
| Lens Mount | Canon EF | Canon EF |
| Focal Length | 18 mm | 200 mm |
| Largest Aperture | 1.5 | 2.8 |
| Anamorphic | Missing | No |
| Minimum Focus Distance | 45 cm | Missing |
| Type | Prime | Prime |
| Aperture Range | 1.5 - 22 | Missing |
| Lens Front Diameter (Not Filter Thread) | 114 mm | Missing |
| Aperture Blades | 9 | Missing |
| Image Stabilization | Missing | No |
| Autofocus | Missing | Evet |
| Weather Seal | Missing | Yes |
| Full Frame Coverage | Missing | Yes |
| Lens Hood Included | Missing | Yes |
