A taking lens system for forming an image on a solid-state image sensor
has, from the object side thereof: an aperture stop, a first lens element
having a positive optical power and convex to the object side, a second
lens element having a positive optical power and convex to the
image-surface side, and a third lens element having a negative optical
power and concave to the image-surface side. Alternatively, a taking lens
system for forming an image on a solid-state image sensor has an aperture
stop, a first lens element having a positive optical power, having a
meniscus shape, and convex to the object side, a second lens element
having a positive optical power, and a third lens element having a
negative optical power. In addition, in either case, the taking lens
system fulfills prescribed conditional formulae.