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 Pentax KAF mount cameras.
Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Lens Mount
Samyang 20mm F1.8 is compatible with cameras that have Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III, Pentax K-1 II and Pentax KP.
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.
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.
Samyang 20mm F1.8 has a filter thread of 77mm.
Focal Range
Samyang 20mm F1.8 has a fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 30mm.
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 is the eight most popular comparisons of Samyang 20mm F1.8 amongst Camera Decision readers.