08-15-2017, 11:54 AM
Quote:There is one already. It's called the Sigma 100-400. Okay, it's not a Tamron, but it weighs only 1160 grams and is as sharp as the Canon 100-400. The best part: it costs less than half the CanonYes, I know the Sigma lens, but a 750g 100-400 lens (half the weight of the Canon 100-400 II) would be nothing to sneeze at.