Yesterday, although it was hard to tell for sure because of the noise associated with handheld testing, that a lighter lens did slightly better when handheld with IBIS on the Sony alpha 7 Mark II (a7II) at 135mm. For today’s test, I’m pairing the monstrous, heavy Zeiss 85mm f/1.4 Otus with the svelte, dimunitive Zeiss 85mm… [Read More]
135 Apo-Sonnar, Apo-Telyt, handheld with IBIS on the a7II
I was asked how well the Zeiss 135mm f/2 Apo-Sonnar performed handheld on the Sony alpha 7 Mark II (a7II) with and without in-body image stabilization (IBIS) turned on. I did a run and the results were wonky. I did another run with the Leica 135/3.4 Apo-Telyt and the results were better, but still didn[‘t… [Read More]
Sony a7II IBIS and sloppy technique
I tested the performance of the in-body image stabilization (IBIS; Sony calls it Steadyshot) on the Sony alpha 7 Mark II (a7II) with 16mm, 28mm, 55 mm, and 180mm lenses. The improvements over handholding without the IBIS turned on were impressive, both in reduction of the average amount of blur, and the tightening of the… [Read More]
Simulating Sony a7II camera motion blur
I few days ago, I posted the results of simulating camera motion blur in a Sony alpha 7R (a7R), showing how the modulation transfer function, as measured by MTF50, varied with camera motion blur measured in pixels, and also showing simulated photographs with their motion distances and MTF50 values, so that you could see what… [Read More]
The visibility of a7R shutter shock
Ever since the Sony alpha 7R (let’s call it the a7R) came out in late 2013, a furor has raged about its shutter shock, or, more precisely, on whether it had any. One group of people — and that includes moi — were analyzing its effects and developing ways to ameliorate it. Another group vehemently… [Read More]
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