Image-forming lens, and camera device and portable information terminal device with the image-forming lens

An image-forming lens comprising:

• from an object side to an image side in the following order,
• a first group with a positive refractive power having a total of either three or four lens elements, which includes at least two negative lenses and one positive lens and, in which a first lens element on a most object side is a negative meniscus lens a convex surface of which faces the object side and a second lens element adjacent to a surface on the image side of the first lens element is a negative lens;
• an aperture;
• and
• a second group with a positive refractive power which includes five lens elements including at least one cemented lens in which two lens elements of a positive lens and a negative lens are cemented to each other;
• wherein each of the first group and the second group shifts independently to perform focusing to a limited object distance, and an interval between the first lens element and the second lens element:
• d11-2 and an interval between the second lens element and a third lens element adjacent to a surface on the image side of the second lens element:
• d12-3 satisfy Conditional Expression B:
• 0.0<d12-3/d11-2<0.4.

An image-forming lens comprising:

• from an object side to an image side in the following order,
• a first group with a positive refractive power having a total of either four or five lens elements, which includes two negative lenses and at least two positive lenses and, in which a first lens element on a most object side is a negative meniscus lens a convex surface of which faces the object side;
• an aperture;
• and
• a second group with a positive refractive power having a total of five lens elements or less, which includes at least one cemented lens in which two lens elements of a positive lens and a negative lens are cemented to each other, a negative lens and a positive lens;
• wherein each of the first group and the second group shifts independently to perform focusing to a limited object distance, an interval between the first lens element and a second lens element adjacent to a surface on the image side of the first lens element:
• d11-2 and an interval between the second lens element and a third lens element adjacent to a surface on the image side of the second lens element:
• d12-3 satisfy Conditional Expression A:
• 0.0<d12-3/d11-2<1.0, and
• a shape of a lens surface on the most image side of the first group and a shape of a lens surface on the most object side of the second lens group are convex shapes.