I have a Nikon D700 plus a Nikon 24-70 mm lens which I use all the time. However, I am going on Safari September and wanting to buy a telephoto lens.

My thought was the Sigma 120-400 mm lens. Was advised that this lens is not as good as the Sigma 50-500 mm lens.

What do people who have these lenses think about this.

I know the 50-5000 mm is heavy - but so is the 24-70 mm lens. I could take the 50-500mm lens to Namibia and leave the 24-70 mm at home. What do you think?

thank you

Sue