Samyang 20mm F1.8 is a Fixed aperture Manual Focus (MF)
Ultra-Wideangle Prime lens with 35mm FF max sensor coverage, and it is designed to be used with
EF Mount cameras.
The Samyang 20mm F1.8 is also available in the Canon EF-M , Fujifilm X, Micro Four Thirds, Nikon F (FX), Pentax KAF, Samsung NX, Sony Alpha and Sony E mounts.
What type of photography is the Samyang 20mm F1.8 lens good for?
The choice of photography type for which you intend to use the Samyang 20mm F1.8 is a crucial decision factor. Below, we have assessed its suitability for various photography scenarios:
There is only one more lens with the Canon EF mount that has the exact same focal and aperture range with the Samyang 20mm F1.8, the Sigma 20mm F1.8 EX DG RF.
Lenses in Canon EF Mount with Same Focal and Aperture Range
Reasons to Buy the Samyang 20mm F1.8 ED AS UMC Lens
Here we've included a summary of the advantages and disadvantages of the Samyang 20mm F1.8 ED AS UMC lens in a list form to assist you in determining whether it offers the features you need.
| Aperture Ring |
| Distance Scale |
| Hood supplied |
| Full-time Manual Focusing |
| Fast Aperture |
| Covers Full-Frame Sensor |
| Min focus distance of 0.2m / 7.9 inch |
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Buy Samyang 20mm F1.8 from Amazon or B&H PHOTO
| No Weather Sealing |
| No Autofocus |
Lens Mount
Samyang 20mm F1.8 is compatible with cameras that have a Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Size, Weight and Filter Thread
The size and weight are crucial factors to consider when searching for your next lens. Samyang 20mm F1.8 has a maximum diameter of 83mm and a total length of 88mm. It weighs 497g / 17.5 oz.
Samyang 20mm F1.8 has a filter thread of 77mm. Below are links to the filters that we recommend you to consider for your Samyang 20mm F1.8:
You can also check All Canon EF Mount Lenses with 77mm Filter Thread Size to find the matching lenses.
Focal Range
Samyang 20mm F1.8 has a fixed focal length of 20mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 32mm.
Below are the 3 Ultra-Wideangle Prime type Canon12 mount lens alternatives with highest max magnification ratios:
Aperture
The Samyang 20mm F1.8 ED AS UMC features a maximum aperture of F1.8 and can be stopped down to a minimum aperture of F22. With an exceptionally wide F1.8 maximum aperture, this lens excels in challenging low-light environments, letting you shoot at lower ISO speeds to keep images clean and noise-free. Given the wider 20mm field of view, the background will naturally stay a bit more in focus, making it ideal for environmental portraits, street photography, or landscapes where context matters. The minimum setting of F22 is excellent for deep depth of field work like macro photography, though you may want to avoid the absolute smallest settings to skip the sharpness loss caused by optical diffraction.
Optical Formula
Samyang 20mm F1.8's optical formula consists of 13 elements in 12 groups . The following special elements are used in this design:
- Two aspherical
- 3 ED elements
- Ultra Multi Coating
Lens Hood
Samyang 20mm F1.8 comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Popular Comparisons of Samyang 20mm F1.8
Here are the 8 most popular comparisons of the Samyang 20mm F1.8 amongst Camera Decision readers.
Top Alternatives of Samyang 20mm F1.8 Lens
In addition, it would be interesting to check which lenses from other mounts are most commonly compared with the Samyang 20mm F1.8 ED AS UMC.
Top Alternatives of Samyang 20mm F1.8 in Other Lens Mounts
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