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Available Oct 6: Fujifilm GF 20-35mm f/4 R WR

Fujifilm GF 20-35mm f/4 R WR

I plan on evaluating/testing the Fujifilm GF 20-35mm f/4 R WR as soon as I can get ahold of it, and hopefully with enough strength to do so in the Eastern Sierra fall color season.

“On paper”, the 20-35mm f/4 is an exciting development, as it could be paired with the Fujifilm GF 35-70mm f/4.5-5.6 for the very broad range of 20-70mm in just two lenses. And dispense with the cost and bulk of the Fujifilm GF 23mm f/4 and Fujifilm GF 30mm f/3.5.

Optical performance

Will a zoom lens perform as well as the Fujifilm GF 23mm f/4, at least by f/8? The 35-70mm does so, or comes exceedingly close. If so, we have a winner, a fantastic new option on the Fujifilm GFX100S/100 and other GFX cameras.

The MTF charts for the 20-35mm look better than the MTF for the 23/4, so there is a lot of promise if only a good sample is obtained, and there are not other downside factors, such as excessive distortion.

Distortion

My guess is that barrel distortion will be on the unpleasant side at the wide end, but if it’s not worse than the Fujifilm GF 35-70mm f/4.5-5.6, then it will be perfectly usable. At 23mm the distortion would moderate somewhat vs 20mm, so keep those fingers crossed (the GF 23/4 has commendably low distortion).

The 20-35mm might also have strong pincushion distortion on the telephoto end, but maybe not too much. Pincushion distortion is fugly and substantially degrades the sharpness over all of the frame if distortion correction is used.

Why can’t Fujifilm and other companies raise their game to the bare minimum marketing competence, and publish relative distortion charts so we don’t have to guess?!

Thank you for ordering your G20-35mm and other gear through the links on this site.

Sample images

A few of the Fujifilm sample images are impressive. Others are useless for evaluating image quality. And one is pointless due to gross incompetence (eg a massively degraded f/22 image when f/22 has absolutely no justification).

Press release excerpt

UWA zoom lens offering premium image quality

The optical construction of GF20-35mmF4 R WR comprises 14 elements in ten groups, including three aspherical, one ED aspherical and three ED elements, for effective control of distortion and chromatic aberration. With these elements, the lens delivers high-resolution images of up to 100-megapixels with edge-to-edge sharpness at all focal lengths and aperture settings. The optical quality is further ensured through Fujifilm’s unique, Nano GI coating technology, which cuts down reflected light to minimize ghosting and flare, boosting sharpness, color and detail.

Compact design that brings mobility to large format equipment

Measuring just 4.4 inches (112.5mm) and weighing 25.6 oz. (725g), GF20-35mmF4 R LM WR has the filter thread size of 82mm despite being an UWA zoom lens, which allows photographers the versatility of choosing a variety of filters when creating landscape images. In addition, GF20-35mmF4 R WR uses an internal zoom mechanism, so its physical length and weight remain constant at every focal length.

A total of four aspherical elements are used in each of the lens groups to optimize the overall number of elements and their configuration, thus efficiently correcting aberrations to maintain advanced image quality while keeping the compact form factor. The concave lens surface of strong curvature, typically seen in UWA lenses, is applied with a specialized coating with even thickness to minimize ghosting.

As part of the design construction, magnesium alloy is used for components around the lens mount to make it lightweight and robust at the same time. 

Fujifilm GF 20-35mm f/4 R WR

 


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