Tamron SP 17mm f/3.5 Adaptall-2 model 151B

Tamron SP 17mm f/3.5 Adaptall-2 model 151B is a manual focus wide angle lens for full frame cameras.

Optical design

Has 5 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Average brightness in this league

Physical characteristics

56 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 82 mm lens filters in this range can be expensive, purchase lens - and filter - only if you plan to keep them for long time, make a try with used ones. Weights 270 grams so consider putting to your camera bag.