Samyang AF 12mm F/2 E (Rokinon)

Ultra-wide angle prime lens • Digital era

Features highlight / 機能のハイライト

APS-C
ASPH
STM
Compact
DP/WR

Specification / 仕様

Production status and name / 生産状況と名称
Announced / 発表: April 2021
Production status / 生産状況: In production
Original name / 元の名前: <No information>
Optical design / 光学設計
Maximum format / 最大フォーマット: APS-C
Mount / マウント: Sony E
Diagonal angle of view / 対角画角: 99.3° (Sony E APS-C)
Lens construction / レンズ構造: 12 elements - 10 groups
2 ASPH, 3 ED
Diaphragm mechanism / ダイヤフラムメカニズム
Number of blades / 絞り羽根の数: 7
Focusing / フォーカシング
Closest focusing distance / 最短撮影距離: 0.19m
Maximum magnification ratio / 最大倍率: 1:11.11 at the closest focusing distance
Focusing method / フォーカシング方法: <No information>
Focusing modes / フォーカシングモード: Autofocus, manual focus
Manual focus control / マニュアルフォーカス制御: Focusing ring
Autofocus motor / オートフォーカスモーター: Stepping motor
Focus mode selector / フォーカスモードセレクター: None; focusing mode is set from the camera
Manual focus override in autofocus mode / オートフォーカスモードでの手動フォーカスオーバーライド: Determined by the camera
Image stabilizer / 手ぶれ補正
Image stabilizer / 手ぶれ補正: -
Physical characteristics / 体格的特徴
Weight / 重量: 213g
Maximum diameter x Length / 最大直径x長さ: ⌀70×59.2mm
Weather sealing / ウェザーシーリング: Dust-proof and water-resistant barrel
Fluorine coating / フッ素コーティング: -
Accessories / 付属品
Filters / フィルタ: Screw-type 62mm
Lens hood / レンズフード: Bayonet-type (petal-shaped)

Manufacturer description

Now APS-C camera users who prefer to use autofocus lenses can easily capture vast sceneries with high resolution. Samyang's advanced AF technology is adoted to Samyang MF 12mm F2.0 which has been loved by its outstanding image quality. Thus, clear images without distortion and vignetting can be obtained through in-body image stabilization. Meet the AF 12mm F2 E equipped with new design and weather sealing feature!

Samyang MF 12mm F2.0, one of the Samyang's bestsellers, now adopts the Autofocus system! This new prime lens is the world's first Autofocus 12mm lens compatible with E mount, which performs optimally on Sony APS-C mirrorless cameras.

  1. It's the only option for APS-C users who want ultra-wide-angle autofocus lens.
  2. It's a perfect match to compact APS-C camera with gimbal, since it's very compact and light.
  3. It includes useful design features as well as new modern design to meet the photographers' needs. It has new modern designs such as matt finishing and a hidden red ring. An ergonomically designed grip with a micro pattern rubber ring maximizes the usability. A weather-sealing feature and a rear protective glass prevent dust, light rain, and snow from penetrating.

Bright F2 aperture guarantees faster shutter speed in low light condition while capturing astrophotography or nightscapes. 5 special glasses (1 H-ASP, 1 ASP, and 3 ED) in this lens deliver exceptional resolution from the center to corner, minimizing optical aberration. Meet the 'Astrophotography-Centric' lens for the photographers who want both astrophotography and Autofocus system.

The AF 12mm F2 E is a dream lens for APS-C users who want to take astrophotography. This 12mm focal length lens provides an ultra-wide-angle of view of 99.1° and has full compatibility with Sony APS-C mirrorless cameras (E mount). Now APS-C photographers can create wide angle astrophotography in harmony with the background landscape by taking advantage of wide angle of view. This lens offers a bright F2 aperture which guarantees faster shutter speed in low light conditions, and this makes you capture clear and round star shape.

You can take the starry night or nightscape images with outstanding image quality thanks to the advanced optical design incorporating 5 special elements (1 H-ASP, 1 ASP, and 3 ED). This lens achieves exceptional resolution image quality from the center to the edges of the frame, even at F2 maximum aperture. The backlight haze is effectively decreased due to the 14-layer-special coating even with the small hood.

AF 12mm F2 E is the lightest and smallest AF 12mm lens currently in the market. Weighing only 213g(7.5oz) and measuring only 59.2mm(2.3in) in length, this new 12mm strikes the perfect balance of portability and outstanding performance and is a perfect match to compact APS-C camera with gimbal. This lens includes new modern design features such as matt finishing and a hidden red ring. Photographer's shooting environment as well as modern design is considered. An designed grip with a micro pattern rubber ring maximizes the usability. A weather-sealing feature and a rear protective glass prevent dust, light rain, and snow from penetrating. It allows you to capture stunning images in less than perfect conditions.

Bright F2 aperture offers beautifully blurred background. The subject and background are effectively separated, creating an impressive ultra wide images with shallow depth of field. The 7-blade circular aperture contributes natural-looking bokeh and impressive starburst effect.

The short minimum focusing distance, only 0.19m (0.62ft), enables you to capture various close-ups such as funny portraits, food on the table, and indoors images. Take a couple of steps closer to your subject and get creative images!

Now Autofocus needs to consider not only how more accurately and quickly it captures images, but also how quiet and smooth it is. Thanks to the Samyang's Linear STM (Stepping Motor), a larger and heavier focus lens group can be controlled more quietly and precisely, providing excellent image quality in photos and videos. The superb auto focus performance is specifically ideal for shooting videos since this lens is a perfect match with a compact APS-C camera and a gimbal.

Typical application / 典型的なアプリケーション

landscapes, interiors, buildings, cityscapes, travel

Recommendations / 推奨事項

  • Due to the fact that the manufacturer of this lens does not provide adequate quality control, we cannot recommend lenses from this manufacturer for purchase.

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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 ultra-wide angle prime lenses

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

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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.

Model produced in a small batch. It is collectible and can only be found on the secondary market.

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 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.

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.