Archives for 2020

I’ve tested the Fujifilm 45-100 mm f/4 against two other Fuji GFX zooms, the 32-64/4 and the 100-200/5.6. In this post, I’ll be comparing the lens to the Fuji 63/2.8 at f/4, f/5.6 and f/8. I’ll be looking at center and corner sharpness using a 22-inch-diameter low-contrast Siemens star target that I printed for this… [Read More]

I’ve tested the Fujifilm 45-100 mm f/4 against two other Fuji GFX zooms, the 32-64/4 and the 100-200/5.6. In this and the two posts after it, I’ll be comparing the lens to the Fuji 45/2.8, 63/2.8, and 110/2. I’m doing the 110/2 in this post, and testing it against the 45-100 at f/4, f/5.6 and… [Read More]

In my last post, I did a quick-and-dirty calculation of the focal length of the Fuji 45-100 mm f/4 G-mount lens when the nominal focal length was set to 100 mm. I got about 80 mm at 3 feet. There is an accurate method of measuring the focal length of lenses that was, if not… [Read More]

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]