18-50mm F2.8 DC DN | Contemporary
18-50mm F2.8 DC DN | Contemporary
- Lens Construction
-
SLD glass
ASPHERICAL LENS
- MTF Chart
-
Diffraction MTF
Geometrical MTF
| Spatial frequency | S:Sagittal Line | M:Meridional Line |
|---|---|---|
| 10lp/mm |
|
|
| 30lp/mm |
|
|
The MTF chart gives the result at the wide-open aperture
Specifications
- Lens Construction
-
10 groups, 13 elements (1 SLD and 3 aspherical lenses)
- Angle of View
-
L-Mount：76.5°（W）-31.7°（T）
Sony E-mount：76.5°（W）-31.7°（T）
FUJIFILM X Mount：76.5°（W）-31.7°（T）
Canon RF Mount：73.4°（W）-30.0°（T）
- Number of Diaphragm Blades
-
7 (rounded diaphragm)
- Minimum Aperture
-
F22
- Minimum Focusing Distance
-
12.1（W）-30（T）cm / 4.8（W）-11.9（T）in.
- Maximum Magnification Ratio
-
1:2.8（W）-1:5（T）
- Filter Size
-
φ55mm
- Dimensions (Diameter × Length)
-
L-Mount：φ65.4mm × 74.5mm / φ2.6in. × 2.9in.
Sony E-mount：φ61.6mm × 76.5mm / φ2.4in. × 3.0in.
FUJIFILM X Mount：φ61.6mm × 76.8mm / φ2.4in. × 3.0in.
Canon RF Mount：φ69.2mm × 74.5mm / φ2.7in. × 2.9in.
*The length of a lens is measured from the filter surface to its mount.
- Weight
-
L-Mount：290g / 10.2oz.
Sony E-mount：290g / 10.2oz.
FUJIFILM X Mount：285g / 10.1oz.
Canon RF Mount：300g / 10.6oz.
- Edition Number
-
C021
About Edition Number
- Supplied Accessories
-
・LENS HOOD LH582-02
・FRONT CAP LCF-55mm III
・REAR CAP LCR II
- Mount / Product Barcode
-
L-Mount：00-85126-58569-3
Sony E-mount：00-85126-58565-5
FUJIFILM X Mount：00-85126-58575-4
Canon RF Mount：00-85126-58572-3
Technology
Others
Lens construction: 13 elements in 10 groups
Compatible with high-speed autofocus
Support DMF and AF+MF
Petal type lens hood（LH582-02）
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
7-blade rounded diaphragm
High-precision, durable brass bayonet mount
* L-Mount is a registered trademark of Leica Camera AG.
* Sony E-mount is developed, manufactured and sold based on the specifications of E-mount which was disclosed by Sony Corporation under the license agreement with Sony Corporation.
* Canon RF Mount is developed, manufactured and sold under license from Canon Inc.