Nikon Nikkor 25-50mm f/4 Ai-S

Nikon Nikkor 25-50mm f/4 Ai-S is a manual focus prime zoom 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

112 mm long, requires consideration if you want to carry in the camera bag. Weights 600 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.