aberration
aspherical
Bower
coma
coma aberration
element
lens
lens distortion
nightscapes
Rokinon
Rokinon 14mm f/2.8
Rokinon 24mm f/1.4
Rokinon 35mm f/1.4
Samyang
Samyang Optics
stars
starscapes
Overcoming Coma Aberration - Part 2
Stars and coma : Capturing stars as points of light is a challenge in optical design. Without the addition of special aspherical elements, ...