Fuji 45-100/4 on GFX 100 — screening

The new Fujifilm 45-100 mm f/4 R LM OIS WR (hereafter yclept the 45-100/4) arrived today. I performed my usual lens screening test.

Here’s the scene, at 60 mm. I moved the target as I changed focal lengths. Target distance varied between 28 and 40 meters.

I made the exposures with the following setup:

• The heaviest RRS legs
• Arca Swiss C1 head
• ISO 100
• Shutter 1/4000, electronic
• f/4
• Manual focus with the target at the center for the first shot.
• Other shots with target at top, bottom,extreme right and left, and the corners
• Focal length 45, 60 and 100mm
• 3 sets of shots at each focal length
• Developed in Lightroom
• Picked best center shot of each series
• Sharpening amount 20 radius 1, detail 0 (much less sharpening than the default)
• Adobe Color profile

I assembled composites in Photoshop.

All are pretty sharp in the center, but softer on-axis at 100 mm. The softest corners are:

• 45 mm: lower right
• 60 mm: lower left
• 100 mm: lower left

The tops and sides are pretty sharp. The corners, not so much, but still not bad for a zoom. There is little light falloff off-axis.

It appears that this lens is reasonably well constructed. It is definitely not a lemon.