Wide-angle lens

A wide-angle lens comprising:

• a front lens set, an aperture, and a rear lens set in sequence from an object side to an image side, wherein
• the front lens set is composed of a first lens, a second lens, and a third lens arranged in sequence from the object side to the image side,
• the rear lens set is composed of a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side,
• the first lens is a negative lens with a concave lens surface facing the image side,
• the second lens is a negative lens with a concave lens surface facing the image side,
• the third lens is a positive lens with a convex lens surface facing the image side,
• the fourth lens is a glass biconvex lens,
• the fifth lens is a lens with a concave lens surface facing the image side,
• the sixth lens is a biconvex lens, and
• when the total object-image distance of the lens system is denoted as do, and the focal length of the fourth lens is denoted as f4, the following conditional expression is satisfied:
• 3.
• <
• d
• ⁢
• 0
• /
• f
• ⁢
• 4
• <
• 4
• .
• 0
• ⁢
• 0
• ⁢
• 0
• .