Samyang 21mm F1.4 ED AS UMC CS is a Fixed aperture Manual Focus (MF)
Wideangle Prime lens with APS-C / DX max sensor coverage, and it is designed to be used with
X Mount cameras. Samyang 21mm F1.4 ED AS UMC CS is also sold under the Rokinon 21mm F1.4 ED AS UMC CS name in some countries.
The Samyang 21mm F1.4 ED AS UMC CS is also available in the Canon EF-M , Micro Four Thirds and Sony E mounts.
What type of photography is the Samyang 21mm F1.4 ED AS UMC CS lens good for?
The choice of photography type for which you intend to use the Samyang 21mm F1.4 ED AS UMC CS is a crucial decision factor. Below, we have assessed its suitability for various photography scenarios:
Reasons to Buy the Samyang 21mm F1.4 ED AS UMC CS Lens
Here we've included a summary of the advantages and disadvantages of the Samyang 21mm F1.4 ED AS UMC CS lens in a list form to assist you in determining whether it offers the features you need.
| Aperture Ring |
| Distance Scale |
| DoF(Depth of Field) Scale |
| Hood supplied |
| Full-time Manual Focusing |
| Very Fast Aperture |
| 9 Diaphragm Blades for Smooth Bokeh |
| Min focus distance of 0.28m / 11.0 inch |
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| No Weather Sealing |
| No Autofocus |
Lens Mount
Samyang 21mm F1.4 ED AS UMC CS is compatible with cameras that have a Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5.
Size, Weight and Filter Thread
The size and weight are crucial factors to consider when searching for your next lens. Samyang 21mm F1.4 ED AS UMC CS has a maximum diameter of 64mm and a total length of 68mm. It weighs 275g / 9.7 oz.
Samyang 21mm F1.4 ED AS UMC CS has a filter thread of 58mm. Below are links to the filters that we recommend you to consider for your Samyang 21mm F1.4 ED AS UMC CS:
You can also check All Fujifilm X Mount Lenses with 58mm Filter Thread Size to find the matching lenses.
Focal Range
Samyang 21mm F1.4 ED AS UMC CS has a fixed focal length of 21mm which has a 35mm equivalent focal range of 31.5mm when used on a APS-C / DX format camera.
Below are the 3 Wideangle Prime type Fujifilm X mount lens alternatives with highest max magnification ratios:
Aperture
The Samyang 21mm F1.4 ED AS UMC CS features a maximum aperture of F1.4 and can be stopped down to a minimum aperture of F22. With an exceptionally wide F1.4 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 21mm 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 21mm F1.4 ED AS UMC CS's optical formula consists of 8 elements in 7 groups . The following special elements are used in this design:
- 3 aspherical
- 2 ED elements
- Ultra Multi Coating
Lens Hood
Samyang 21mm F1.4 ED AS UMC CS comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Body Colour
Samyang 21mm F1.4 ED AS UMC CS is available in Black color.
Popular Comparisons of Samyang 21mm F1.4 ED AS UMC CS
Here are the 8 most popular comparisons of the Samyang 21mm F1.4 ED AS UMC CS amongst Camera Decision readers.
Top Alternatives of Samyang 21mm F1.4 ED AS UMC CS Lens
In addition, it would be interesting to check which lenses from other mounts are most commonly compared with the Samyang 21mm F1.4 ED AS UMC CS.
Top Alternatives of Samyang 21mm F1.4 ED AS UMC CS in Other Lens Mounts
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