Low total track length lens assembly including seven lenses of +−+−++− refractive powers for large sensor format

A lens assembly comprising:

• from an object side to an image side,
• seven lens elements numbered L1-L7;
• an optical window;
• and
• an image sensor having a sensor diagonal length (SDL),
• wherein the lens assembly has a total track length TTL that includes the optical window, an effective focal length EFL and a field of view (FOV)<90 degrees, wherein TTL/EFL<1.100, wherein TTL/SDL<0.64, wherein a normalized thickness standard deviation constant T_STD of four of the seven lens elements complies with T_STD≤0.02971, wherein a focal length f1 of lens element L1 fulfills f1/EFL<0.95, wherein lens element L1 is convex on the object side, and wherein a focal length f5 of lens element L5 fulfills |f5/EFL|>4.0.

A lens assembly comprising:

• from an object side to an image side,
• seven lens elements numbered L1-L7, wherein the lens elements have, starting with lens element L1, a power sign sequence of positive-negative-positive-negative-positive-positive-negative;
• an optical window;
• and
• an image sensor having a sensor diagonal length (SDL),
• wherein the lens assembly has a total track length TTL that includes the optical window, an effective focal length EFL and a field of view (FOV)<90 degrees, wherein TTL/EFL<1.100, wherein TTL/SDL<0.64, wherein a normalized thickness standard deviation constant T_STD of four of the seven lens elements complies with T_STD≤0.02971, and wherein a focal length f1 of lens element L1 fulfills f1/EFL<0.95 and wherein lens element L1 is convex on the object side.