Promaster Spectrum7 60-300mm f/4-5.6 UMCS
Promaster Spectrum7 60-300mm f/4-5.6 UMCS is a auto focus ultra telephoto zoom lens for full frame cameras.
Great choice mainly for good light conditions Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.
Weights 637 grams so it is a heavy lens, consider using its own lens bag. 67 mm lens filter diameter, you are one step from the next standard filter size, buy step-up ring and bigger filter. 117 mm long, requires consideration if you want to carry in the camera bag.