Fujifilm Fujinon GF 20-35mm F/4 R WR

Wide-angle zoom lens • Digital era

Abbreviations

GF The lens is designed for Fujifilm medium format digital mirrorless cameras.
R The lens is equipped with aperture ring.
WR Dust-proof and Weather-Resistant lens.

Production details

Announced:September 2022
Production status: In production
Production type:Mass production
Original name:FUJINON GF LENS 20-35mm 1:4 R WR
System: Fujifilm G (2017)

Features highlight

44x33
Extreme AoV @ 20-29mm
Constant F/4
4 ASPH
4 ED
9 blades
STM
DP/WR
FC
IZ

Specification

Optical design
Focal length range:20mm - 35mm [1.8X zoom ratio]
Speed range:F/4 across the focal length range
Maximum format:Medium format 44x33
Mount and Flange focal distance:Fujifilm G [26.7mm]
Lens construction:14 elements - 10 groups
4 ASPH, 4 ED
Diaphragm mechanism
Diaphragm type:Automatic
Aperture control:Aperture ring (Manual settings + Auto Exposure setting + Setting chosen with the camera command dial)
Number of blades:9
Zooming
Zoom mechanism:Manual
Zoom control:Zoom ring
Zoom type:Rotary
Zooming method:Internal zooming
Focusing
Closest focusing distance:0.35m
Maximum magnification ratio:1:7.14 @ 35mm at the closest focusing distance
Focusing method:<No data>
Focusing modes:Autofocus, manual focus
Manual focus control:Focusing ring
Autofocus motor:Stepping motor
Focus mode selector:None; focusing mode is set from the camera
Manual focus override in autofocus mode:Determined by the camera
Optical Image Stabilizer (OIS)
Built-in OIS:-
Physical characteristics
Weight:725g
Maximum diameter x Length:⌀88.5×112.5mm
Weather sealing:Dust-proof and water-resistant barrel
Fluorine coating:Front element
Accessories
Filters:Screw-type 82mm
Lens hood:Bayonet-type (petal-shaped)
Teleconverters:Not compatible

*) Source of data: Manufacturer's technical data.

Manufacturer description #1

TOKYO, September 9, 2022 – FUJIFILM Corporation (President and CEO, Representative Director: Teiichi Goto) announces the launch of the “FUJINON Lens GF20-35mmF4 R WR” (GF20-35mmF4 R WR) in late September 2022. It will be a new addition to the lineup of interchangeable GF lenses designed for the GFX Series of mirrorless digital cameras, incorporating a large-format sensor*1 approximately 1.7 times larger than a full-frame 35mm sensor.

The GF20-35mmF4 R WR is a zoom lens that covers the focal length of 20mm (equivalent to 16mm in the 35mm film format), the widest in GF lens series, to extend the wide-angle end of photographic categories. When mounted on the GFX Series of digital cameras, this lens brings out the full potential of the cameras’ large format sensor to deliver high image quality. Furthermore, by making use of the ultra-wide-angle (UWA) of view, users can precisely capture information-dense scenes such as wilderness landscape and cityscape that spreads out in front of their eyes.

The GF20-35mmF4 R WR covers the focal length range from the UWA 20mm to the wide-angle 35mm (equivalent to 16mm – 28mm in the 35mm film format). It consists of 14 lens elements in ten groups, including three aspherical elements, one aspherical ED element and three ED elements to suppress distortion and chromatic aberration. The lens is also applied with the Nano GI coating to effectively control ghosting and lens flair to achieve image clarity. While UWA zoom lenses tend to be large and heavy, this model has been kept compact and light, weighing about 725g and measuring about 112.5mm for exceptional mobility. It offers a constant F4 maximum aperture across the focal length range for added convenience. Furthermore, the use of the versatile 82mm filter size broadens the scope of visual expressions by attaching a wide variety of filters.

The GF20-35mmF4 R WR is designed to offer more comfortable shooting experience for landscape photographers, who spend many hours outdoors in search for expansive views. It is also suited for shooting a full view of a small room in limited space, taking advantage of wide-angle lenses’ unique perspective or capturing scenes in a documentary style.

Having 15 lens lineup including GF20-35mmF4 R WR and an extensive range of accessories, Fujifilm will continue to offer shooting pleasure with GFX Series, covering photographic categories from UWA to ultra-telephoto.

*1 An image sensor that measures 55mm diagonally (43.8mm x 32.9mm) and is approximately 1.7 times larger than a 35mm full-frame sensor.

1. Product features

(1) Zoom lens that extends the wide-angle reach of GF lenses, which pursue high image quality

  • The GF20-35mmF4 R WR is a zoom lens that covers the focal length of 20mm (equivalent to 16mm in the 35mm film format), the widest in GF lens series. It is capable of capturing information-dense scenes precisely such as wilderness landscape and cityscape that spreads out in front of their eyes and taking pictures that take advantage of wide-angle perspective.
  • The lens consists of 14 lens elements in ten groups, including a total of seven aspherical elements and ED elements, to suppress distortion and chromatic aberration to deliver excellent image-resolving performance. It can capture all information, broadly captured in the wide-angle frame, and deliver it in high-definition description.
  • The lens is applied with Fujifilm’s unique NANO GI coating, which seamlessly changes incoming light’s refractive index as it enters into the lens to mitigate light reflection. A special coating is also applied to the concave surface of lens elements with large curvature to even out their film thickness in order to reduce ghosting and lens flair, typical of wide-angle lenses.

(2) Compact and lightweight design for advanced mobility

  • The GF20-35mmF4 R WR features optimized structure of lens elements and makes maximum use of short flange focal distance, typical of mirrorless digital cameras. Despite being an UWA zoom with maximum aperture of F4.0 across the zoom range, the lens has been kept lightweight and compact, weighing about 725g and measuring about 112.5mm in length. This reduces the strain of users when they carry a camera mounted with this lens.
  • The lens uses the versatile 82mm filter size, so that users can attach a variety of filters when enjoying landscape photography, etc.
  • Magnesium alloy is used for components to make the lens lightweight and robust at the same time. The shape of components has been updated to keep the lens barrel slim, making it easier holding the lens.
  • The lens uses the Inner Zoom system to keep its length constant, making it lightweight and comfortable to zoom.

(3) Robust design with dust and weather resistance and capability of operating at -10℃

  • The lens barrel is weather-sealed in 12 places to ensure dust and weather resistance, and has the ability to operate at temperatures as low as -10℃. The front lens element is applied with fluorine coating to repel water and offer protection against stains. This means users can enjoy the lens with peace of mind to take photos in tough conditions including snowfield and tropics or in rough weather.

Manufacturer description #2

GF20-35mmF4 R WR is a stunning ultra wide-angle large format zoom for image-makers with a broader view. Capable of producing outstanding 100-megapixel images packed with color and detail, it provides a dream focal range in a compact, light, and weather-resistant design.

Offering a 35mm equivalent focal range of a 16-28mm lens, GF20-35mmF4 R WR brings the most popular wide-angle options to the GFX System, giving limitless options for compositions and creative expression. With one lens fulfilling most wide-angle needs anyone would have, recording all the beauty the world has to offer is now certainly possible and within easy reach.

GF20-35mmF4 R WR encapsulates all the benefits the large format GFX System has to offer. Its optical construction features four aspherical and four ED lens elements to minimize distortion and aberrations, while Fujifilm's Nano GI coating optimizes sharpness by mitigating internal reflections. The result is detail-rich images packed with color that perfectly recreate the scene at the moment you made the image.

The compact design of GF20-35mmF4 R WR makes it easy to forget it's a large format zoom lens. Measuring just 112.5mm (4.4 inches) and weighing 725g (25.6 oz) it's perfect for carrying to any location, no matter the distance. Its internal zoom mechanism also makes for easy handling and ready to make images to remember. At the end of the day, GF20-35mmF4 R WR may be similar to its full frame equivalent, but it is certainly More Than Full Frame when it comes to large format image quality.

The autofocusing performance on GF20-35mmF4 R WR has been optimized to deliver stunning results. By reducing the weight of the focus lens group, for example, a stepping motor can be used for fast, near-silent focusing. Breathing has also been minimized, allowing multiple frames of the same scene to be taken at different focusing points, then seamlessly combined in post-production for ultimate sharpness.

Wide-angle lenses are often used on location, so GF20-35mmF4 R WR has a rugged, weather-resistant design to cope with all conditions. 12 seals protect the lens from dust, moisture and low temperatures down to -10°C (14°F), plus the flourine-coated front element repels water, fingerprints, and dust making it easier to clean.

Typical application

landscapes, interiors, buildings, cityscapes, travel

Alternatives in the Fujifilm G system

There are no alternatives to this wide-angle zoom lens in the system.
Currently, there are also no improved version of this lens.
This means that the lens is unique in the system.

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35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2

Travellers' choice

Note

Among autofocus lenses designed for 35mm full-frame mirrorless cameras only. Speed of standard and telephoto lenses is taken into account.

Professional lens (Top class)

One of the best slow wide-angle zooms

According to lens-db.com; among lenses designed for the same maximum format and mount.

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You are already on the page dedicated to this lens.

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Cannot compare the lens to itself.

Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

Stepping motor

Aspherical elements

Aspherical elements (ASPH, XA, XGM) are used in wide-angle lenses for correction of distortion and in large-aperture lenses for correction of spherical aberration, astigmatism and coma, thus ensuring excellent sharpness and contrast even at fully open aperture. The effect of the aspherical element is determined by its position within the optical formula: the more the aspherical element moves away from the aperture stop, the more it influences distortion; close to the aperture stop it can be particularly used to correct spherical aberration. Aspherical element can substitute one or several regular spherical elements to achieve similar or better optical results, which allows to develop more compact and lightweight lenses.

Use of aspherical elements has its downsides: it leads to non-uniform rendering of out-of-focus highlights. This effect usually appears as "onion-like" texture of concentric rings or "wooly-like" texture and is caused by very slight defects in the surface of aspherical element. It is difficult to predict such effect, but usually it occurs when the highlights are small enough and far enough out of focus.

Low dispersion elements

Low dispersion elements (ED, LD, SD, UD etc) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. This type of glass exhibits low refractive index, low dispersion, and exceptional partial dispersion characteristics compared to standard optical glass. Two lenses made of low dispersion glass offer almost the same performance as one fluorite lens.

Low dispersion elements

Low dispersion elements (ED, LD, SD, UD etc) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. This type of glass exhibits low refractive index, low dispersion, and exceptional partial dispersion characteristics compared to standard optical glass. Two lenses made of low dispersion glass offer almost the same performance as one fluorite lens.

Canon's Super UD, Nikon's Super ED, Pentax' Super ED, Sigma's FLD ("F" Low Dispersion), Sony' Super ED and Tamron's XLD glasses are the highest level low dispersion glasses available with extremely high light transmission. These optical glasses have a performance equal to fluorite glass.

High-refraction low-dispersion elements

High-refraction low-dispersion elements (HLD) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

High Index, High Dispersion elements

High Index, High Dispersion elements (HID) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

Anomalous partial dispersion elements

Anomalous partial dispersion elements (AD) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

Fluorite elements

Synthetic fluorite elements (FL) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. Compared with optical glass, fluorite lenses have a considerably lower refraction index, low dispersion and extraordinary partial dispersion, and high transmission of infrared and ultraviolet light. They are also significantly lighter than optical glass.

According to Nikon, fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index. To avoid this, Canon, as the manufacturer most widely using fluorite in its telephoto lenses, never uses fluorite in the front and rear lens elements, and the white coating is applied to the lens barrels to reflect light and prevent the lens from overheating.

Short-wavelength refractive elements

High and specialized-dispersion elements (SR) refract light with wavelengths shorter than that of blue to achieve highly precise chromatic aberration compensation. This technology also results in smaller and lighter lenses.

Blue Spectrum Refractive Optics

Organic Blue Spectrum Refractive Optics material (BR Optics) placed between convex and concave elements made from conventional optical glass provides more efficient correction of longitudinal chromatic aberrations in comparison with conventional technology.

Diffraction elements

Diffraction elements (DO, PF) cancel chromatic aberrations at various wavelengths. This technology results in smaller and lighter lenses in comparison with traditional designs with no compromise in image quality.

High refractive index elements

High refractive index elements (HR, HRI, XR etc) minimize field curvature and spherical aberration. High refractive index element can substitute one or several regular elements to achieve similar or better optical results, which allows to develop more compact and lightweight lenses.

Apodization element

Apodization element (APD) is in fact a radial gradient filter. It practically does not change the characteristics of light beam passing through its central part but absorbs the light at the periphery. It sort of softens the edges of the aperture making the transition from foreground to background zone very smooth and results in very attractive, natural looking and silky smooth bokeh.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.

Format

Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),

where:

CF – crop-factor of a sensor,
FL – focal length of a lens.

Mount

A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.

The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.

Speed

The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

Electromagnetic diaphragm control system

Provides highly accurate diaphragm control and stable auto exposure performance during continuous shooting.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Fixed diaphragm

The aperture setting is fixed at F/4 on this lens, and cannot be adjusted.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.

Weight

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.

Filters

Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.

Teleconverters

Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.

Rotary zoom

The change of focal length is achieved by turning the zoom ring and the manual focusing - by turning the separate focusing ring.

Push/pull zooming allows for faster change of focal length, however conventional method based on the rotation of the zoom ring provides more accurate and smooth zooming.

Push/pull zoom

The change of focal length happens when the photographer moves the ring towards the mount or backwards.

Push/pull zooming allows for faster change of focal length, however conventional method based on the rotation of the zoom ring provides more accurate and smooth zooming.

Zoom lock

The lens features a zoom lock to keep the zoom ring fixed. This function is convenient for carrying a camera with the lens on a strap because it prevents the lens from extending.

Zoom clutch

To set the manual zoom mode, pull the zoom ring towards the camera side until the words "POWER ZOOM" disappear.

The Holy Trinity of lenses

The Holy Trinity of lenses refers to a three-lens set that covers a focal length range from the ultra-wide focal length of 14-16mm all the way long to the telephoto focal length of 200mm. The set typically consists of a 16-35mm ultra-wide angle zoom lens, a 24-70mm standard zoom lens and a 70-200mm telephoto zoom lens and usually represents the best constant-aperture zoom lenses in a manufacturer's lineup. The set is designed to cover almost every genre of photography, be it landscapes, architecture, portraits, weddings, sports, travel or even wildlife (with teleconverter). However, it is also expensive, large and heavy.