Schneider-KREUZNACH AF 40-80mm F/4-5.6 Aspherical LS

Standard zoom lens • Digital era

ASPHERICAL The lens incorporates aspherical elements.
LS A lens with built-in leaf shutter.
Schneider-KREUZNACH AF 40-80mm F/4-5.6 Aspherical LS

Mamiya 645AF

Medium format AF film SLR camera

Announced:1999
Mount:Mamiya M645
Format:56 × 41.5mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:153x128x184mm
Weight:1730g

Mamiya 645AFD

Medium format AF film SLR camera

Announced:2001
Mount:Mamiya M645
Format:56 × 41.5mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:153x128x184mm
Weight:1730g

Mamiya 645AFD II

Medium format AF film SLR camera

Announced:2005
Mount:Mamiya M645
Format:56 × 41.5mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:153x128x184mm
Weight:1730g

Mamiya 645AFD III

Medium format AF film SLR camera

Also known as:Phase One 645AF
Announced:2008
Mount:Mamiya M645
Format:56 × 41.5mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:153x128x184mm
Weight:1780g

Mamiya 645DF

Medium format AF digital SLR camera

Also known as:Phase One 645DF
Announced:2009
Mount:Mamiya M645
Format:56 × 41.5mm
Sensor type:CCD
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:3600 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Image stabilizer:-
Dimensions:153x128x152mm
Weight:1030g

Mamiya 645DF+

Medium format AF digital SLR camera

Also known as:Phase One 645DF+
Announced:2012
Mount:Mamiya M645
Format:56 × 41.5mm
Sensor type:CCD
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:3600 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Image stabilizer:-
Dimensions:153x128x152mm
Weight:1030g

Phase One XF

Medium format AF digital SLR camera

Announced:May 2015
Mount:Mamiya M645
Format:53.9 × 40.4mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:3600 - 1/4000 + B, T
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Image stabilizer:-
Dimensions:152x108x85mm
Weight:790g

Features highlight

6x4.5
2 ASPH
Body AF
Focus Clutch
ZL
LS

Specification

Production details
Announced:June 2014
Production status:In production
Production type:Mass production
Original name:Schneider-KREUZNACH ZOOM AF ASPHERICAL 40-80mm 1:4-5.6 LS
Optical design
Focal length range:40mm - 80mm
Speed range:F/4 @ 40mm - F/5.6 @ 80mm
Maximum format:Medium format 6x4.5
Mount:Mamiya M645
Diagonal angle of view:82.2° @ 40mm - 47.1° @ 80mm (Medium format)
Lens construction:15 elements - 11 groups
2 ASPH
Diaphragm mechanism
Number of blades:<No information>
Built-in leaf shutter
Type:Electronically controlled
Speeds:1 - 1/1600
Zooming
Zoom type:Rotary
Zooming method:<No information>
Additional features:Zoom lock
Focusing
Closest focusing distance:0.6m
Maximum magnification ratio:1:5.56 @ 80mm at the closest focusing distance
Focusing method:<No information>
Focusing modes:Autofocus, manual focus
Manual focus control:Focusing ring
Autofocus motor:In-camera motor
Focus mode selector:Focus Clutch Mechanism
Manual focus override in autofocus mode:-
Optical Image Stabilizer (OIS)
Built-in OIS:-
Physical characteristics
Weight:1860g
Maximum diameter x Length:⌀111×150mm
Weather sealing:-
Fluorine coating:-
Accessories
Filters:Screw-type 105mm
Lens hood:Bayonet-type (petal-shaped)

Manufacturer description #1

Copenhagen, June 2, 2014 - Phase One today announced the immediate availability of the Schneider Kreuznach 40-80 mm f/4.0-5.6 leaf shutter zoom lens. This is the second zoom lens designed for the Phase One 645 camera platform, and it offers workflow versatility without compromising image quality.

The new Schneider Kreuznach 40-80 mm f/4.0-5.6 leaf shutter zoom lens is the latest result of close optical collaboration between Schneider Kreuznach, Phase One and Mamiya Digital Imaging. It complements the existing Schneider Kreuznach 75-150 mm f/4.0-5.6 leaf shutter zoom lens.

"Designing a zoom lens with excellent optical qualities throughout the zoom range is always a challenge," said Senior Product Manager Espen Beck, Phase One. "When the zoom range goes from a fairly wide angle perspective to a normal perspective, as our new lens does, this only adds to the design complexity. This lens has 15 optical elements, two of which are aspherical, arranged in 11 groups. We have invested greater design and engineering resources into this lens than any of those before it, and we are very proud of the results. I think that this lens will be a perfect companion for on-location photographers."

"At first, I was skeptical when I heard about this lens that was supposedly on par with prime lenses in terms of image quality," said Los Angeles based photographer Richard Thompson III. "But I have just used it for an on location high-end car shoot, and I was blown away by its performance. The images are flawless. I would never have relied on a zoom lens for my most high-end jobs. Now, with this new short zoom lens from Schneider Kreuznach, I can."

Manufacturer description #2

Phase One Announces First Schneider Kreuznach Blue Ring Zoom Lenses

Prime Lens Quality Featuring Full Frame Sensor Coverage, Improved Precision, and Advanced Electronics

COPENHAGEN, July 18, 2016 – Phase One, creator of the world’s finest open-platform high-end camera systems and professional imaging software, today added two new Schneider Kreuznach lenses to its comprehensive family of lenses. These two Blue Ring zoom lenses feature impressive front glass elements, with front lens diameters of 63mm and 65mm respectively, delivering edge-to-edge coverage of full frame 645 format. Used on a Phase One XF 100MP system, the lenses are able to take full advantage of the sensor’s resolution; a 100MP capture renders a 100MP image with breathtaking fidelity.

-- The Schneider Kreuznach 40-80mm LS f/4.0-5.6 Zoom lens renders ultra sharp resolution on all zoom distances from wide to normal focal length;

-- The Schneider Kreuznach 75-150mm LS f/4.0-5.6 Zoom lens delivers great versatility. It’s preferred for on-location fashion shoots, with a range from normal to telephoto.

Together, these two lenses comprise an effective zoom range from 40mm to 150mm. Each lens is equipped with a zoom lock function on its barrel and is designed to maintain focus position while zooming. They each support flash synchronization up to 1/1600s. The new built-in electronics permit individual focus calibration when used with the Phase One XF Camera System.

“Creating optics this large with such tight tolerances is quite an achievement, “said Espen Beck, Phase One Senior Product Manager. “A Phase One full frame 100MP medium format sensor is 1.5 times larger than the cropped size 50MP medium format and 2.5 times larger than sensors found in high-end 35mm DSLRs. Capturing the full resolution of a square sensor this size with a round lens and avoiding crop means that the entire lens must be larger, which requires larger movements of individual lens elements while meeting the requisite standards for speed and precision.

“Schneider Kreuznach lenses are designed to deliver the ultimate analogue input to be shaped and refined with the Phase One XF 100MP Camera System and Capture One software. This design also benefits the Phase One XF 50MP system, which can exploit the ‘sweet spot’ of the lens, producing impeccable results.”

Designed by Schneider Kreuznach and produced by Phase One Japan, Schneider Kreuznach “Blue Ring” zoom lenses are refined with robust, aerial-grade mechanics and manufactured to meet Phase One’s highest quality assurance standards. Their enhanced precision, mechanical build, and look and feel complement the Phase One XF Camera System design.

Manufacturer description #3

Schneider Kreuznach 40-80mm LS f/4.0-5.6 Zoom lens performs with ultra sharp rendition on all focal lengths. The optical quality of this zoom lens is comparable with what you would expect from a genuine prime lens.

In combination with the Schneider Kreuznach 75-150mm LS f/4.0-5.6 Zoom, the focal length range is complete, from 40mm to 150mm with only two lenses.

  • Prime lens quality on full zoom range
  • Preferred lens for location shoots from wide to normal focal length
  • Flash synchronization up to 1/1600th
  • f4/5.6 – f45
  • Practically no focus shift during zoom
  • Zoom lock function on barrel

Typical application

landscapes, interiors, buildings, cityscapes, portraits, photojournalism, weddings, parties, carnivals, live concerts, travel

Notes and recommendations

  • Use of a tripod is recommended due to heavy weight of the lens.

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35mm full frame

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

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 standard 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.

Quality control issues

The manufacturer of this lens does not provide adequate quality control. If you do decide to purchase this lens, do not order it online, but choose the best copy available in the store. In any case, there may also be problems with the build quality, and warranty repairs can take months.

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.

In-camera motor

Focus Clutch Mechanism

Focus Clutch Mechanism allows the photographer to switch between AF and MF simply by snapping the focus ring forward for AF and back toward the camera to focus manually.

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 from the lens mount to the film or sensor can also be different.

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.

Flange focal distance

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

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.

Convex protruding front element

The convex front element protrudes from the lens barrel, making it impossible to use filters.

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.

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 and the manual focusing is achieved by one and the same ring. The change of focal length happens when the photographer moves the ring towards the mount or backwards and the rotation of the ring leads to change of focus.

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.

Power Zoom

The lens features electronically driven zoom mechanism. It provides smoother, more natural zoom movements than you could accomplish by hand.

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.