Imaging lens and imaging device

An imaging lens consisting of, in order from an object side to an image side:

• a first lens group;
• a stop;
• and
• a second lens group having a positive refractive power, wherein:
• the first lens group includes three or more Ln lenses that are consecutively disposed,
• the Ln lens is a negative lens in which a surface on the image side is a concave surface, and
• in a case in which, for each lens of the first lens group and the second lens group,
• a refractive index at a wavelength of 435.83 nm is denoted by ng,
• a refractive index at a wavelength of 1529.58 nm is denoted by na, and
• a refractive index at a wavelength of 2325.42 nm is denoted by nb,
• an Abbe number v and a partial dispersion ratio θ are defined as
• v=(na−1)/(ng−nb) and
• θ=(na−nb)/(ng−nb), respectively, and,
• among the three or more Ln lenses that are consecutively disposed and included in the first lens group, for two Ln lenses selected in descending order of refractive power,
• an average of the Abbe numbers v is denoted by vave, and
• an average of the partial dispersion ratios θ is denoted by θave,
• in a Cartesian coordinate system with a horizontal axis representing the Abbe number v and a vertical axis representing the partial dispersion ratio θ, vave and θave are included in a common region of four regions,
• a fifth region represented by θ>0.0250×v−0.1000,
• a sixth region represented by θ<0.0250×v−0.0375,
• a seventh region represented by θ>0.0500, and
• an eighth region represented by θ<0.1500, and
• in a case in which
• a sum of a distance on an optical axis from a lens surface closest to the object side of the imaging lens to a lens surface closest to the image side of the imaging lens and a back focus in terms of an air conversion distance of the imaging lens at a wavelength of 1529.58 nm is denoted by TL, and
• a focal length of the imaging lens at a wavelength of 1529.58 nm is denoted by f,
• Conditional Expression (4) is satisfied:
• 29<TL/f<38 (4).