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Push-pull zooms are fucking awesome, OP. I've got a Kiron 28-210 and a Tokina 100-300 f4 and in terms of speed and usability they're the bee's fucking knees. I shot airshows, wildlife, and sports events with the latter and had little trouble manually focusing since I could spin it into focus while zooming. 2-touch zooms can floss their filthy mouths with my ballhairs.