In the previous test, I was surprised to find that the focal length of the Fujifilm 45-100 mm f/4 at close range seemed to be more than 10% shorter than the Fuji 110 mm f/2. It could be that the marked focal lengths weren’t accurate on one or both of the lenses. Or it could… [Read More]
Fuji 45-100/4 and 110/2 bottle bokeh
I’m hoping the title made the oenophiles reading this blog chuckle a bit. In the last post, I took a technical look at the out-of-focus performance of the Fujifilm 45-100 mm f/4 lens, and found it substantially inferior to that of the Fuji 110 mm f/2. Do these differences carry over into real-world shooting? This… [Read More]
Fuji 45-100/4 bokeh and out-of-focus performance
I’ve had some questions about the bokeh of the Fujifilm 45-100 mm f/4. There are two aspects to bokeh. The first is relatively simple: how do the far-out-of-focus point spread functions (PSFs) vary across the frame, and what it their nature? That’s what determines the bokeh characteristics of the background on a wide-open, close-range portrait…. [Read More]
Fuji 45-100/4 corner sharpness and field curvature
When I did my lens screening test on the Fujifilm 45-100 mm f/4 a few days ago, I noticed the corners were a bit soft wide open. Not soft for a zoom, mind you, but still substantially softer than the on-axis sharpness. I wondered if the softness was inherent in the lens, or was due… [Read More]
Fuji 45-100/4, 100-200/5.6 on GFX 100
Earlier today I tested the Fujifilm 45-100/4 against the Fuji 32-64/4. Now I’m running another test, this one against Fuji’s other medium format zoom, the 100-200/5.6. The 100-200 has some issues between 135 and 200 mm, but is a good performer at the short end. I tested both lenses at 100 mm. The scene, at… [Read More]