Fujifilm FUJINON XF 23mm F/1.4 R LM WR

Wide-angle prime lens • Pro • Digital era

Abbreviations

XF The lens is designed for Fujifilm APS-C digital mirrorless cameras.
R The lens is equipped with aperture ring.
LM The lens is equipped with Linear Motor.
WR Dust-proof and Weather-Resistant lens.

Production details

Announced:September 2021
Production type:Mass production
Production status: In production
Original name:FUJINON ASPHERICAL LENS SUPER EBC XF 23mm 1:1.4 R LM WR
System:Fujifilm X (2012)

Model history (2)

Fujifilm FUJINON XF 23mm F/1.4 RAPS-CA11 - 80.6m⌀62 2013 
Fujifilm FUJINON XF 23mm F/1.4 R LM WRAPS-CA15 - 100.19m⌀58 2021 

Features highlight

APS-C
Ultra fast
2
ASPH
3
ED
IF
9 blades
CFD 0.19m
LM
DP/WR
⌀58
filters

Specification

Optical design
Focal length:23mm
Speed:F/1.4
Maximum format:APS-C
Mount and Flange focal distance:Fujifilm X [17.7mm]
Diagonal angle of view:63.5° (Fujifilm X APS-C)
Lens construction:15 elements - 10 groups
2 ASPH, 3 ED
Internal focusing (IF)
Diaphragm mechanism
Diaphragm type:Automatic
Aperture control:Aperture ring (Manual settings + Auto Exposure setting)
Number of blades:9 (nine)
Focusing
Closest focusing distance:0.19m
Maximum magnification ratio:1:5 at the closest focusing distance
Focusing modes:Autofocus, manual focus
Manual focus control:Focusing ring
Autofocus motor:Linear 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:375g
Maximum diameter x Length:⌀67×77.8mm
Weather sealing:Dust-proof and water-resistant barrel
Fluorine coating:-
Accessories
Filters:Screw-type 58mm
Lens hood:Bayonet-type (petal-shaped)
Bayonet-type LH-XF23 II (rectangular)
Teleconverters:Not compatible

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

35mm equivalent focal length and speed

In terms of FoV & DoF
Camera series [Crop factor] Focal length SpeedMax MR Dia. angle of view
Fujifilm X APS-C [1.52x] 35mm F/2.11:3.29 63.5°

Manufacturer description

TOKYO, September 2, 2021 – FUJIFILM Corporation (President: Teiichi Goto) is pleased to announce the launch of the “FUJINON Lens XF23mmF1.4 R LM WR” (XF23mmF1.4 R LM WR) in November 2021. It will be a new addition to the lineup of interchangeable XF lenses for the X Series of mirrorless digital cameras, known for their compact and lightweight design and outstanding image quality based on Fujifilm’s proprietary color reproduction technology.

The XF23mmF1.4 R LM WR is a large-diameter wide-angle prime lens with the focal length of 23mm (equivalent to 35mm in the 35mm format). This is an upgrade of the current “FUJINON Lens XF23mmF1.4 R” (the previous model), enhancing resolution capabilities and AF speed while maintaining the fast F1.4 maximum aperture. The new model also boasts advanced usability with its dust and weather resistant construction and the capability to operate at temperatures as low as -10°C.

The XF23mmF1.4 R LM WR is a large-diameter wide-angle prime lens that consists of 15 lens elements, including two aspherical elements and three ED elements, in 10 groups, achieving enhanced resolution capabilities over the previous model. The maximum aperture of F1.4 produces shallow depth-of-field. The newly-adopted nine aperture blades also contributes to natural and creamy bokeh. The highly versatile focal length of 23mm makes it an ideal choice for landscape photography and snapshots. The minimum working distance of about 19cm provides close-up capability and enables a dynamic framing, capturing the main subject in close-up while keeping vast background into the frame. The lens also uses the Inner Focus system, driven by a newly-adopted linear motor, to deliver fast and highly accurate AF, attaining focus in as fast as 0.04 seconds*1 to seize a decisive photo opportunity. It also boasts advanced usability with its dust and weather resistant construction and the capability to operate at temperatures as low as -10°C.

In addition to the XF23mmF1.4 R LM WR, Fujifilm has today announced the launch of the FUJINON Lens XF33mmF1.4 R LM WR. Including the FUJINON Lens XF18mmF1.4 R LM WR, launched in May this year, a total of three lenses form a new-generation “large diameter prime” series with high resolution capabilities, catering to future advancement in image sensor resolutions.

*1 Using an internal measurement method compliant with the CIPA Guidelines, when mounted on the mirrorless digital camera “FUJIFILM X-T4” with Phase Detection AF activated and the High Performance Mode turned ON.

1. Product features

(1) Superior resolution capabilities and beautiful bokeh

  • The lens consists of 15 lens elements in 10 groups, including two aspherical elements and three ED elements, to effectively minimize chromatic aberration and spherical aberration. High resolution capabilities, improved from that of the previous model, captures the finest details of a photo subject in edge-to-edge sharpness. An aspherical element and an ED element are positioned closest to the mount while the focusing group containing the other aspherical element and two ED elements is positioned in the middle. The focusing group is driven together to reduce fluctuation of aberration attributable to changes in shooting distance.
  • Boasting the maximum aperture of F1.4, the lens allows users to produce images that take advantage of its shallow depth-of-field. The use of nine aperture blades which produces nearly round shape bokeh effect, and reduced color casts in bokeh by well-controlled comatic aberration enables the natural and creamy bokeh.

(2) Dynamic framing with the wide-angle 23mm focal length

  • This is a wide-angle lens that offers a highly versatile 23mm focal length (equivalent to 35mm in the 35mm format), making it a perfect choice for landscape photography and snapshots. The minimum working distance of about 19cm and the maximum magnification of 0.2x (equivalent to approx. 0.3x in the 35mm format), enable a dynamic framing that captures the main subject in close-up while keeping vast background into the frame.

(3) Newly adopting a linear motor for fast and highly accurate AF and weather-sealed construction

  • The lens uses the Inner Focus system, in which a compact and lightweight focusing lens group is driven by a newly-adopted linear motor. The focusing group is designed to have a small range of movement to achieve a fast and highly accurate AF, attaining focus in as fast as 0.04 seconds to seize a decisive photo opportunity.
  • The lens delivers silent and smooth focusing in the AF-C mode, frequently used when recording video. Fujifilm’s proprietary optical design technology has minimized changes in the angle of view during focusing (focus breathing), making the lens an ideal choice for video recording as well as still photo shooting.
  • The focus ring can sense the amount of rotation very accurately to detect even the subtlest of fingertip operations for precise focusing.
  • The lens barrel is weather-sealed at 11 locations so that it is dust and weather resistant and can be operated in temperatures as low as -10°C, accommodating snapshots in light rain, dusty conditions or astrophotography in cold winter nights.

(4) Compact design for added usability

  • The use of smaller-diameter lens elements in the focusing group and optimized positioning of the linear motor have kept this lens compact, weighing approximately 375g and measuring approximately 77.8mm long with the filter thread size of 58mm. This reduces users’ load when they walk around with this lens, mounted on a camera.
  • The A (auto) Position Lock offers reliable operation, locking the aperture ring in place to avoid any unintentional adjustment during shooting.

Accessory

Lens hood LH-XF23 II

(designed for the FUJINON Lens XF23mmF1.4 R LM WR and FUJINON Lens XF33mmF1.4 R LM WR)

Together with the launch of the XF23mmF1.4 R LM WR, Fujifilm is releasing the rectangular-shaped Lens Hood LH-XF23 II. It helps reduce flares and ghosting to capture clear pictures. The milled-aluminum design gives it a classical and stylish look. It can also be fitted to the XF33mmF1.4 R LM WR, announced today.

From the editor

The optical system of the lens is significantly more complex compared to the predecessor, but the lens weighs only 75g more and features a linear autofocus motor optimized for video recording. Its other advantages include weather sealing, a shorter closest focusing distance, a smaller filter size and 9 aperture blades. All in all, it is a convincing, successful update of the XF 23mm F/1.4 R lens.

Typical application

Class:

Ultra-fast APS-C-format wide-angle prime lens • Professional model (Top class)

Professional model (Top class)

  • Combination of focal length and speed meets professional demands
  • Dust-proof and water-resistant barrel
  • Linear motor

Genres or subjects of photography (12):

Landscapes • Cityscapes • Buildings • Interiors • Full to mid-body portraits • Photojournalism • Weddings • Parties • Carnivals • Live concerts • Street • Travel photography

Recommended slowest shutter speed when shooting static subjects handheld:

1/25th of a second

Alternatives in the Fujifilm X system

///// Sorted by focal length and speed, in ascending order /////

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35mm full frame

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

Linear 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.

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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.

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.

Fixed focus

There is no helicoid in this lens and everything is in focus from the closest focusing distance to infinity.

Internal focusing (IF)

Conventional lenses employ an all-group shifting system, in which all lens elements shift during focusing. The IF system, however, shifts only part of the optics during focusing. The advantages of the IF system are:

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/1.4 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.