Optical proven formula that goal makes it a classic that every photographer should have in his wallet. This is, to my knowledge, the cheapest market objective, but it gives excellent quality pictures! The large aperture (f / 1.8) allows you to make low-light without a flash. Note however that the shallow depth of field at wide apertures which requires unwavering focus for close-up pictures (eg portrait) By cons, it is true that it is plastic, which makes it quite fragile (it is also a replacement purchase, my previous who made the soul méchappant hands at 50cm from the ground) It is also true that it is extremely noisy, so unusable without external micro video. A purchase to make knowingly!
