15mm F1.4
DG DN FISHEYE
- World's first* full-frame F1.4 diagonal fisheye
- 180° angle of view that covers entire frame
- Outstanding optical performance
- Dust and splash resistant structure
- Responsive, quiet autofocus
- Manual Focus Lock switch
- Lens Heater Retainer
- Locking front cap with filter storage slots
- Rear Filter Holder
- Removable tripod socket
- Aperture ring with de-click function
- Made in Japan
AWARDS
| Angle of view | Fisheye | |
|---|---|---|
| Camera Type | Mirrorless | |
| Lens Mount | L-Mount, Sony E-mount | |
| Anduri suurus | Täiskaadriline | |
| Ehitus | 21 elements in 15 groups (4 FLD, 3 SLD, and 2 Aspherical lenses) | |
| Vaatenurk | 180° | |
| Diafragma labade arv | 11 (rounded diaphragm) | |
| Minimaalne ava | F16 | |
| Minimaalne teravustamiskaugus | 38,5 cm | |
| Maksimaalne suurendussuhe | 1:16 | |
| Filtri läbimõõt | n/a | |
| Mõõdud (läbimõõt x pikkus) | Sony E-mount φ104mm × 159,9mm |
|
| Kaal (g) | Sony E-mount 1360 g |
|
| Väljaande number | A024 | |
| Kaasasolevad tarvikud | Cover Lens Cap LC1040-01, Tripod Socket TS-141, Protective Cover PT-51, Gide Plate GP-21, Rear Cap, Soft Case LS-478SEL | |
| Aksessuaarid | USB dock UD-11 (L-mount only) | |
| EAN | Sony E-mount 085126478650 |
|
| Specifications Info | * The appearance and specifications of the product are subject to change. |
|
Resolving power that overturns the conventional wisdom about fisheye lenses
The latest optical design thoroughly corrects each type of aberration. This diagonal fisheye lens has the unique expressiveness of a fisheye lens and high resolution throughout the entire image from a wide-open aperture. The performance of the lens is guaranteed by a full inspection with Sigma's proprietary MTF measuring system.
Even wide-open, high resolution and point image reproducibility across the entire image
The lens consists of 21 elements in 15 groups, including 4 FLD and 3 SLD exclusive low-dispersion glass elements, and 2 aspherical lens elements. By correcting sagittal coma flare and other aberrations, the lens can precisely reproduce bright points of light across the whole frame even wide open, making it ideal for astrophotography.
Diagonal fisheye lens with 180° angle of view
The powerful distortion effect, which is the appeal of fisheye lenses, allows users to enjoy expressions such as a unique perspective and emphasis on the subject at a 180° angle of view. In addition, the Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Art is designed with the strict performance standards of the Art line. Furthermore, all lenses are inspected with Sigma's proprietary MTF measuring system. The unique descriptive power of this new fisheye lens, which combines an incredible 180° angle-of-view with very high resolution optics, delivers a level of artistic potential that exceeds other fisheye lenses.
Designed to minimize flare and ghosting
To prevent flare and ghosting, which reduce image quality, the lens is designed to handle all conditions of incident light based on state-of-the-art simulation technology. High backlight resistance enables clear and sharp images under any lighting conditions.
An addition to the Art F1.4 lineup, meticulously crafted for astrophotography
The Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Art offers an abundant functions to support astrophotography. With the introduction of this lens, Sigma now has four F1.4 wide-angle prime Art line lenses with functions specifically designed for astrophotography, including the 14mm, 20mm, and 24mm. In terms of both lineup and functionality, Sigma fully supports the joy of capturing the stars
Art F1.4 prime wide-angle lens series specialized for astrophotography
MFL (Manual Focus Lock) switch
The lens is equipped with an MFL switch. When the MFL switch is set to “LOCK,” the focus ring operation is disabled, ensuring that once focus is acquired, it will not be changed by unintentional movement of the ring. This is useful for long exposures and other situations where the focus should be fixed while shooting.
Lens heater retainer
A small step at the front of the lens called a lens heater retainer prevents the lens heater* from protruding over the front element, eliminating the risk of vignetting.
*A belt-shaped heat strip that is wrapped around the lens to prevent condensation from forming inside the lens when the temperature drops.
Rear filter holder
Special cover lens cap
The included cover lens cap features two slots to securely store rear filters, as well as a locking mechanism. The cap is specially designed for the Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Art, allowing users to carry sheet-type filters without the risk of confusing or forgetting them, while protecting them from scratches and dirt.
Tripod Socket
The lens is equipped with an Arca-Swiss compatible, lightweight and sturdy magnesium alloy tripod socket. The detachable leg can be mounted on a tripod for stable conditions even during long exposures. The shape has been deliberately designed to prevent interference when using a lens heater.
*The tripod socket TS-141 is also compatible with the Sigma 14mm F1.4 DG DN | Art.
A wealth of latest functions and excellent build quality
The Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Art is equipped with various functions to assist shooting, including an AFL button to which preferred function can be assigned and an aperture ring, and uses a linear motor HLA (High-response Linear Actuator) as the AF actuator to enable fast, quiet, and highly accurate AF shooting. The lens is also equipped with a dust and splash resistant structure to ensure a high level of weather resistance and robustness, as well as excellent build quality that allows for long and reliable use in any environment.
Various shooting assist functions
Dust and splash resistant structure and water and oil repellent coating
Adopts a linear motor HLA
The AF actuator is a linear motor HLA (High-response Linear Actuator). The high thrust motor operates the focus lens at high speed and with high precision to provide comfortable AF shooting.
Excellent build quality
To support the heavy optical system and enhance robustness and reliability, metal parts are used in key parts of the lens body. Meanwhile, the lightweight engineering plastic TSC* is also used in appropriate places to reduce weight. Furthermore, each control part, such as rings and switches, is designed to feel good. Sigma is proud of the exceptional build quality of its products, which do not compromise on durability, operability, and a satisfying sense of ownership.
* TSC (Thermally Stable Composite) is a type of polycarbonate with a thermal expansion rate similar to that of aluminum. It has a high affinity to metal parts which contributes to high quality product manufacturing.
LENS CONSTRUCTION
|
|
|
|
|
FLD GLASS
SLD GLASS
MTF CHART
There are two types of MTF chart. One considers the diffraction quality of light, which is called "Diffraction MTF", and the other, "Geometrical MTF" does not.
The quality of light appears in the diffracted light, and becomes more distinct as the F value gets bigger, resulting in lower image quality. Also, diffracted light exists at every aperture, which is why Sigma has been releasing Diffraction MTF data from the beginning since it is very close to the actual image data.
The advantage of using "Geometric MTF" data is that it is easy to measure and calculate since it does not consider the diffraction quality of light, yet it tends to show higher values in the graph than actual images.
The readings at 10 lines per millimeter measure the lens's contrast ability ( red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens's sharpness ability (green lines), when the aperture is wide open.
Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Moridional (M) line sets.
*The MTF chart gives the result at the wide-open aperture.
|
Spatial frequency |
S:Sagittal Line |
M: Meridional Line |
|
10lp/mm |
|
|
|
30lp/mm |
|
|
DIFFRACTION MTF
DIFFRACTION MTF
GEOMETRICAL MTF
GEOMETRICAL MTF
Inner focus system
To increase stability, this lens configuration uses movable internal lens elements that adjust focus without changing the length of the lens barrel.
HLA (High-response Linear Actuator)
HLA is SIGMA's proprietary linear motor. It drives the focus lens directly without going through gears or other mechanical parts, resulting in quiet, high-precision autofocusing.
Compatible with Lens Aberration Correction
Matching the optical characteristics of the lens, this function performs in-camera corrections of peripheral illumination, chromatic aberrations, distortion, and more, to further enhance image quality.
*Function available on supported cameras only. Available corrections or auto correction functionality may vary depending on the camera model.
*On cameras where lens aberration correction is controlled with 'ON' or 'OFF' in the camera menu, please set all aberration correction functions to 'ON'(AUTO).
Super Multi-Layer Coating
SIGMA's own Super Multi-Layer Coating suppresses flare and ghosting by preventing reflections with in the lens. All lenses in the current SIGMA range feature this original technology. In digital cameras, flare and ghosting may also be caused by reflections between the image sensor and lens surfaces. Here too, SIGMA's Super Multi-Layer Coating is highly ef fective, assuring images of outstanding contrast.
Water and oil repellent coating
Incorporates a water and oil-repellent coating that allows water to be wiped away easily and prevents oil and fat from sticking to the surface, even in challenging shooting conditions. At the same time, the maintenance of the lens surface becomes easier.
Aperture ring
Aperture ring, designed to help users work intuitively
Aperture ring click switch
Mounted with a de-click function for removing clicks by the aperture ring click switch, enabling seamless operations that are especially useful such as during video shooting.
Aperture ring lock switch
Mounted with a de-click function for removing clicks by the aperture ring click switch, enabling seamless operations that are especially useful such as during video shooting.
Aperture ring click switch
A ring lock system to prevent from unintended movement of the aperture ring during shooting.
AFL button
the AFL button can be assigned with various functions widens the range of operations available on the lens.
MFL switch
The MFL (Manual Focus Lock) switch disengages the focus ring on the lens. After manually focusing the lens to the desired position, set the MFL switch to 'LOCK' in order ]to disengage the focus ring.
This prevents the focus of the lens from being moved by accident (such as when attaching a lens heater or changing the composition) and causing out of focus images. The focus ring can still be rotated but will have no effect.
* Please note that some camera bodies may continue to AF even if the MFL switch is set to 'LOCK', or allow AF temporarily even when the camera has been set to MF, and shift the focus when the MFL switch is set to 'LOCK'.
Rear filter holder
The rear filter holder allows the attachment of a sheet-type filter to the rear part of the lens.
Trace the shape on a sheet filter using the guide plate and cut it out for use.
Lens Heater Retainer
The Lens Heater Retainer is a protruding lip at the front of the lens. When the lens is used in conjunction with a lens heater, the Lens Heater Retainer stops the heater from over hanging the front element and causing vignetting. Lens heaters prevent condensation and night dew during nightscape photography such as astrophotography.
Rear filter holder
The rear filter holder allows the attachment of a sheet-type filter to the rear part of the lens.
Trace the shape on a sheet filter using the guide plate and cut it out for use.
Focus Mode Switch
Using this swich, it is possible to switch the focus mode between AF and MF.
Linear focus / Non-linear focus (for L-Mount only）
A focus movement method of interchangeable lenses for mirrorless cameras (DN lens) in relation to the rotational angle of the focus ring during manual focusing.
With "non-linear focus," the amount of focal point movement varies depending on the focus ring rotational speed.
With linear focus, if the focus ring rotational angle is the same, the amount of focal point movement remains the same regardless of the focus ring rotational speed.
Dust and Splash Resistant Structure
This lens features a highly effective dust and splash resistant structure with special sealing at the mount connection, manual focus ring, zoom ring, and cover connection.
*Although this construction allows the lens to be used in light rain, it is not the same as being waterproof, so please prevent large amounts of water from splashing on the lens. It is often impractical to repair the internal mechanism, lens elements and electric components if they are damaged by water.
Lens construction: 21 elements in 15 groups (4 FLD, 3 SLD, 2 aspherical lens)
Compatible with high-speed autofocus
Supports DMF and AF+MF
Compatible with AF assist (for Sony E-mount only)
Tripod socket TS-141
Protective cover PT-51
Special Cover Lens Cap LC1040-01 with a locking mechanism and filter slots
Compatible with SIGMA USB DOCK UD-11 (sold separately / for L-Mount only)
Designed to minimize flare and ghosting
Every single lens undergoes Sigma’s proprietary MTF measuring system
11-blade rounded diaphragm
High-precision, durable brass bayonet mount
Mount Conversion Service available
Made in Aizu, Japan” craftsmanship
180˚ OF HIGH RESOLUTION
AN INNOVATIVE DIAGONAL FISHEYE LENS.
The world's first* F1.4 diagonal fisheye interchangeable lens for 35mm full-frame.
Unparalleled resolving power that overturns the conventional wisdom about fisheye lenses.
In developing a fisheye lens featuring an ultra-wide-angle and powerful fisheye distortion, Sigma has achieved a completely new level of artistic potential, combining the world's first F1.4 aperture for consumer use with outstanding resolving power across the entire image. In terms of optical performance, the Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Art has achieved excellent point image reproducibility and high resolution by correcting various aberrations, especially sagittal coma flare. The lens is capable of handling starscape photography, which demands particularly high-quality performance, even when wide-open. Unlike conventional fisheyes, the Sigma 15mm F1.4 DG DN DIAGONAL FISHEYE | Art is exceptionally sharp across its entire 180° angle-of-view and offers an ultra-fast F1.4 aperture, making it perfect for a wide range of applications including astrophotography, landscapes and architecture. The expressive power of this all-new full-frame mirrorless lens opens a wealth of creative possibilities in wide-angle photography.
* As an interchangeable lens for full-frame cameras for consumer use. (As of February 2024 by Sigma）
