Optical imaging lens assembly

An optical imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis:

• a first lens with a positive refractive power,
• a variable diaphragm,
• a second lens,
• a third lens,
• a fourth lens,
• a fifth lens with a negative refractive power,
• a sixth lens with a positive refractive power, and
• a seventh lens with a negative refractive power,
• an object-side surface of the second lens is a convex surface, while an image-side surface of the second lens is a concave surface, an object-side surface of the third lens is a convex surface, while an image-side surface of the third lens is a concave surface;
• wherein EPDmax is a maximum entrance pupil diameter of the optical imaging lens assembly, EPDmin is a minimum entrance pupil diameter of the optical imaging lens assembly, and EPDmax, EPDmin and a total effective focal length f of the optical imaging lens assembly meet:
• 3.0<f/(EPD max−EPD min)<6.0;
• an effective focal length f2 of the second lens, an effective focal length f5 of the fifth lens and an effective focal length f3 of the third lens meet:
• 0.5<(f2+f5)/f3<1.5:
• a curvature radius R5 of an object-side surface of the third lens, a curvature radius R6 of an image-side surface of the third lens, a curvature radius R3 of an object-side surface of the second lens and a curvature radius R4 of an image-side surface of the second lens meet:
• 1.4<(R5+R6)/(R3+R4)<2.1.