The samyang 24mm f14 ed as if umc is a wide angle lens perfect for landscape travel and documentary photography this manual focus lens is constructed of 13 lenses including 4 ed glass elements arranged in 12 groups with multi layered and anti reflective umc coatings to help prevent ghosting and flare and to ensure a high contrast image thanks to its fast f14 maximum aperture the samyang 24mm is a good low light performer and a great all round lens for travel photography umc stands for