Tamron Zoom Shootout (28-75, 28-200, 35-150 EF, and 70-180)
So i shot all these tests within about an hour of each other (and with a 3.5 month old with me, no less!), but I questioned my desire/stamina/interest in evaluating them all in depth for the sake of this thread. But here are the last of my tests, which were designed to simulate handheld midrange to see the effectiveness of IBIS without lens stabilization. I shot everything using my very average techinque (elbows in, eye to the viewfinder, wide stance, slow exhale) and only shot each focal length once. I assumed any camera shake vs poor lens sharpness would show up when comparing two adjacent focal lengths in the series (135 vs 100 and 150mm, for example). I used AF-S in 12.8x magnification on the very center tree trunk for each shot (except the adapted 35-150, which needs to be MF in 12.8x for accuracy). I shot manual exposure 100 ISO, f8, and a very realistic but somewhat slow for the longer tele lengths 1/80 second. Same processing as before and 100-400% magnification used for various different focal lengths and parts of the frame. Here was the global image, which was much closer than the initial infinity tests.
Tamron Zoom Shootout (28-75, 28-200, 35-150 EF, and 70-180)
So i shot all these tests within about an hour of each other (and with a 3.5 month old with me, no less!), but I questioned my desire/stamina/interest in evaluating them all in depth for the sake of this thread. But here are the last of my tests, which were designed to simulate handheld midrange to see the effectiveness of IBIS without lens stabilization. I shot everything using my very average techinque (elbows in, eye to the viewfinder, wide stance, slow exhale) and only shot each focal length once. I assumed and camera shake vs poor lens sharpness would show up when comparing two adjacent focal lengths in the series (135 vs 100 and 150mm, for example). I used AF-S in 12.8x magnification on the very center tree trunk for each shot (except the adapted 35-150, which needs to be MF in 12.8x for accuracy). I shot manual exposure 100 ISO, f8, and a very realistic but somewhat slow for the longer tele lengths 1/80 second. Same processing as before and 100-400% magnification used for various different focal lengths and parts of the frame. Here was the global image, which was much closer than the initial infinity tests.
