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Leica Elmarit-S 45mm F/2.8 ASPH. [CS]

Wide-angle prime lens • Digital era

Abbreviations

ASPH. The lens incorporates aspherical elements.
CS A lens with built-in leaf shutter.

Features highlight

45x30
Fast
1 ASPH
3 AD
2 HLD
RF
MFO
DP/WR
FC

Specification

Production details
Announced:October 2013
Production status: In production
Production type:Mass production
Order No.:11077 - black anodized
11078 - black anodized, CS
Original name:LEICA ELMARIT-S 1:2.8/45 ASPH.
LEICA ELMARIT-S 1:2.8/45 ASPH. CS
System: Leica S (2008)
Optical design
Focal length:45mm
Speed:F/2.8
Maximum format:Medium format 45x30
Mount and Flange focal distance:Leica S [53mm]
Lens construction:12 elements - 9 groups
1 ASPH, 3 AD, 2 HLD
Diaphragm mechanism
Number of blades:<No information>
Focusing
Closest focusing distance:0.6m
Maximum magnification ratio:1:10.1 at the closest focusing distance
Focusing method:Rear focusing (RF)
Focusing modes:Autofocus, manual focus
Manual focus control:Focusing ring
Autofocus motor:Unknown type
Focus mode selector:None; focusing mode is set from the camera
Manual focus override in autofocus mode:Yes
Optical Image Stabilizer (OIS)
Built-in OIS:-
Physical characteristics
Weight:1030g
Maximum diameter x Length:⌀88×136mm
Weather sealing:Dust-proof and water-resistant barrel
AquaDura coating:Front and rear elements
Accessories
Filters:Screw-type 82mm
Lens hood:Bayonet-type 12400 (rectangular)
Lens caps:16019 (front)
16020 (rear)
Teleconverters:Not available

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

**) Some basic information is missing in the specification as it was not provided by the manufacturer.

Manufacturer description #1

Solms, Germany, 1 October 2013: Further defining the S-System as the ultimate solution for the most demanding professionals, Leica Camera AG has unveiled a new wide-angle lens, the Leica Elmarit-S 45 mm f/2.8 ASPH. Attaining class-leading critical levels of performance in all measurable areas, the Leica Elmarit-S 45 mm f/2.8 ASPH. sets new standards for wide-angle focal lengths in the medium format category. With this addition, the lens portfolio for the Leica S medium format system is now comprised of nine lenses (six of which are also available in a CS variant) with focal lengths ranging from 24 mm to 180 mm, assuring uncompromising imaging quality in almost all situations. Leica is also offering firmware updates FW 2.3.0.0 for the Leica S and FW 1.3.0.0 for the Leica S2 and S2-P, ensuring the optimum functionality of this new lens.

The equivalent angle of view of the Leica Elmarit-S 45 mm f/2.8 ASPH. corresponds to that of a classic 35 mm lens for 35 mm photography. Its moderate wide-angle with neutral reproduction of perspectives makes this versatile lens not only ideal for landscapes and architectural photography, but also in the studio or on location. At the same time, the Leica Elmarit-S 45 mm f/2.8 ASPH.’s fast maximum aperture of f/2.8 makes it an optimal tool for available-light photography and the conscious use of selective planes of focus. Thanks to its brilliant colour rendition and outstanding imaging performance from the closest focus to infinity at all apertures, the Leica Elmarit-S 45 mm f/2.8 ASPH. guarantees perfect results in any photographic situation.

The Leica Elmarit-S 45 mm f/2.8 ASPH. was developed to meet the stringent demands that professional users place on a camera system in their everyday photographic work and guarantees superior image quality. It offers maximum contrast rendition, highest resolution and extremely low distortion, even wide open. This lens also offers excellent control of flare to ensure high-contrast images, even when shooting a backlit subject. This results from its extremely elaborate optical design and construction: A total of twelve lenses are employed to achieve the Leica Elmarit-S 45 mm f/2.8 ASPH.’s exceptional optical performance. Three lenses made from glass with anomalous partial dispersion minimise chromatic aberrations, and two further lenses are manufactured from glass with particularly low dispersion. An additional lens element with an aspherical surface minimises monochromatic aberrations. Rear-group focusing guarantees consistently outstanding imaging properties from infinity to its closest focusing distance.

As with all Leica S-System products, the Leica Elmarit-S 45 mm f/2.8 ASPH. is rugged and reliable, and designed to offer a particularly long operational lifespan. Ensuring absolute dependability, even under the harshest shooting conditions, the lens features an extremely robust bayonet mount and is fully sealed against dust and spray.

Manufacturer description #2

The Leica Elmarit-S 45mm f/2.8 ASPH./CS offers the same angle of view as a 35mm lens in 35mm format and thus adds a true classic focal length to the Leica S system portfolio. With its moderate wide-angle character and simultaneously natural rendition of perspectives, it is particularly suitable for universal use in fields ranging from photojournalism to architectural photography and studio applications. The highly sophisticated construction of this lens, which is also available in a version with a central shutter, guarantees extremely high performance at all distances and aperture settings.

Three of its twelve elements are manufactured from glasses with anomalous partial dispersion and two further elements from glasses with high refractive indices and especially low dispersion properties for the correction of chromatic aberrations. Monochromatic aberrations are prevented by an element with one aspherical surface. Rear-group focusing guarantees consistently outstanding imaging properties from infinity to its closest focusing distance.

The enormous effort invested in the design and construction of this lens guarantees its excellent optical perfor- mance: The contrast is exceptionally high even when shooting wide open and down to its closest focusing dis- tance, and stopping down very slightly is sufficient to ensure this already superior performance into the extreme corners of the image. The distortion value of only 1% is remarkably low for a wide-angle lens and satisfies even the most stringent demands. In the case of the Leica Elmarit-S 45 mm f/2.8 ASPH./CS, monochromatic aberration is practically non-existent and chromatic aberrations have been reduced to a minimum that is negligible in practical circumstances.

Manufacturer description #3

The Elmarit-S 45 f/2.8 ASPH. (CS) (35 mm in 35 mm format) is as outstanding for landscapes and architectural photography as it is for studio work, with its moderately wide-angle characteristics but simultaneously true-to-life perspectives.

Its extremely elaborate construction, designed to deliver maximum contrast at maximum aperture and at the shortest focusing distance, ensures that the lens is practically free of aberrations.

Monochromatic aberration is almost nonexistent and chromatic aberrations are corrected to an absolute minimum.

The Elmarit-S 45 f/2.8 ASPH. (CS) is also available with a built-in central shutter.

  • Corresponds to the angle of view of a 35 mm lens in 35 mm format
  • Innovative central shutterfor maximum design freedom when using additional light
  • Excellent imaging performance over the entire range and at all aperture settings
  • Extremely fast
  • Creative use of sharpness and blurring for the plastic extraction of motif details
  • Best image quality up to the edges due to aspherical optics
  • Weather- and dust-sealed lens

Three of the twelve lens elements are manufactured from glasses with anomalous partial dispersion for the minimization of chromatic aberration and two others from high-refractive-index glasses with exceptionally low dispersion.

In addition to these, one aspherical surface is employed for the minimization of monochromatic aberrations. Rear-group focusing guarantees consistently outstanding imaging properties from infinity to the closest focusing distance.

Typical application

landscapes, interiors, buildings, cityscapes, full to mid-body portraits, photojournalism, weddings, parties, carnivals, live concerts

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35mm full frame

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

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

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Unique Leica Look

Leica lenses are one-of-a-kind optical masterpieces that are impressive because of their unique Leica Look. This is ensured through exceptional optical design combined with selected materials and the highest quality standards.

Leica lenses reveal their full potential only when mounted on Leica cameras, since only these have sensors precisely matched to their optical characteristics.

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.

Unknown type

Sorry, no additional information is available.

16019

Replacement lens cap for Leica S/SL E82 lenses.

16020

Replacement rear cover for Leica S lenses.

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.

Fixed focus

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

Overall linear extension

The entire lens optical system moves straight backward and forward when focusing is carried out. This is the simplest type of focusing used mainly in wide-angle and standard prime lenses. It has the advantage of introducing relatively little change in aberrations with respect to change in focusing distance. With telephoto and super telephoto lenses this method becomes less beneficial in terms of operability because of the increased size and weight of the lens system.

Front group linear extension

The rear group remains fixed and only the front group moves straight backward and forward during focusing. This method is primarily used in zoom lenses and allows to design comparatively simple lens construction, but also places restrictions on zoom magnification and size reduction.

Front group rotational extension

The lens barrel section holding the front lens group rotates to move the front group backward and forward during focusing. This method of focusing is also used only in zoom lenses.

Internal focusing (IF)

Focusing is performed by moving one or more lens groups positioned between the front lens group and the diaphragm.

Methods of internal and rear focusing have the following advantages:

Rear focusing (RF)

Focusing is performed by moving one or more lens groups positioned behind the diaphragm.

Methods of internal and rear focusing have the following advantages:

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.