Nikon Nikkor 18mm f/3.5 Ai-S

Nikon Nikkor 18mm f/3.5 Ai-S is a manual focus wide angle lens for full frame cameras.

Optical design

Has 7 aperture blades, mid-grade lenses usually have this amount of blades. Having rounded blades provides out of focus circle shape closer to a circle. Average brightness in this league

Physical characteristics

Weights 350 grams so plan ahead, carry only if really necessary. With a lens filter diameter of 72 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. 61 mm long, this small lens should be always in the camera bag.