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
KAF Mount cameras.
What type of photography is the Samyang 20mm F1.8 lens good for?
The type of photography that you are planning to use the Samyang 20mm F1.8 is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Reasons to Buy 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 help you determine whether it offers the features you need.
| Aperture Ring |
| Distance Scale |
| Hood supplied |
| Full-time Manual Focusing |
| Fast Aperture |
| Covers Full-Frame Sensor |
| Minimum focus distance of 0.2m / 7.9 inch |
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| No Weather Sealing |
| No Autofocus |
Lens Mount
Samyang 20mm F1.8 is compatible with cameras that have a Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.
Samyang 20mm F1.8 is also available in Canon EF , Canon EF-M, Fujifilm X, Micro Four Thirds, Nikon F (FX), Samsung NX, Sony Alpha and Sony E mounts.
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Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Samyang 20mm F1.8 has a maximum diameter of 83mm and 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:
Focal Range
Samyang 20mm F1.8 has a fixed focal length of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 30mm.
Below are the 3 Ultra-Wideangle Prime type Pentax KAF mount lens alternatives with highest max magnification ratios:
Aperture
Samyang 20mm F1.8 has a max aperture of F1.8 and a minimum aperture of F22.
Optical Formula
Samyang 20mm F1.8's optical formula consists of 13 elements in 12 groups . 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 eight most popular comparisons of the Samyang 20mm F1.8 amongst Camera Decision readers.
Top Alternatives of Samyang 20mm F1.8 Lens
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