Just got back a couple weeks ago from San Diego, Oatman Az., Grand Canyon, and Las Vegas and a few places in between. I never faulted back to the Sony 28 - 70 kit lens for my Sony @ 7 III. I wish we could attach some of the pictures here, the sharp eye of a Pacific Western Gull, the Sea Lions and Children's Beach north of OB, the waves at the famous Ocean Beach, the sleepy surfers beach that is still living the 70's. Vista's of the Grand Canyon, Sunsets over the South Rim, and day and night pictures of Vegas! This lens just did not stop or give up, I beat and abused and pushed it beyond its limits and it gave nothing back but sharp, solid images! While a bit pricey at $2500, the images I attained with it leave me feeling filled with awe and wonder for the beauty this planet shows us! Never looked at any instructions, the lens is intuitive, performs beyond expectations! An amazing landscape lens with enough wide angle, enough telephoto length to replace several lens. Held for hours on end, while heavy, balanced and comfortable comfortable in my hand. Well worth the price, this is on the pro end of the line for Tamron, well done gentlemen! Randall Donaldson