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Leica D SUMMILUX 25mm f/1.4 ASPHERICAL

 

Full frame sized image

Lenses that create APS-C sized image are designed for digital only. They cannot be used on cameras that have image sensor larger than the APS-C format. These lenses are not suitable for film cameras either.

 

No Ultrasonic AF

Lenses with ultrasonic focusing mechanism tend to be quiter and faster than traditionally focusing lenses.

 

No stepping motor AF

Lenses with stepping motor focusing mechanism are better for contrast based focusing, and are quiter and faster than traditionally focusing lenses.

 

One or more Low Dispersion lens element is used

Low Dispersion lens elements help to reduce chromatic aberration.

 

Not stabilized

Image stabilization helps to reduce blur caused by hand shake, especially at high focal length or in low light situations. Image stabilization can give 1 to 3 stop advantage over none stabilized lens, based on the reciprocal rule.

 

Metal mount

Cheaper lenses are usually equipped with plastic mount, while more expensive, professional lenses have metal mount. In general, metal mounts are more durable, and a good thing to have when lenses are changed a lot. When a camera is used mainly with one lens, the material of the lens mount is not that important.

 

Internal Focusing

Internally focusing lenses don't change their size while setting focus.

 

The front lens is fixed

The fixed front lens is not rotating during zoom and/or focusing. This allows the photographer to use petal shaped lens hood. Fixed front lenses also make the use of polarization filters a lot easier.

 

Not Sealed

Weather sealed lenses are protected from dust and water. While they are not water proof, these lenses can be used in rain and other humid environments. Some sealings only provide protection against dust or water, not both. Sealing is only available when the lens is used on a similarly weather sealed camera body.

 

No drop-in filter support

Drop-in filters are used in those lenses where either the front lens is too large, or the field of view doesn't permit the use of traditional filters at the front of the lens. Usually bright tele and ultra-wide angle lenses support this filter type.

This lens, which features 10 lens elements in 9 groups, including one large-diameter aspherical lens, combines outstanding F1.4 brightness at maximum aperture with an exceptional optical performance. The use of one Super ED lens and three ED lenses suppresses chromatic aberration to minimize color bleeding. A floating focus system allows macro shots at a closest focusing distance of 38 cm. An aperture ring on the lens barrel gives this lens, when mounted on the LUMIX DMC-L1, a familiar analog operating feel.

Leica D SUMMILUX 25mm f/1.4 ASPHERICAL Specification

Available mount(s) Micro FourThirds
Application(s) Portrait, Landscape, Architecture, Special effects
Category(s) Standard prime
Multiplier
Stabilizer no
Focal length 25 mm (prime)
Lens construction 10 elements in 9 groups
Angle of view 35mm: N/A
digital: 46°
Number of blades 7
Maximum aperture f/1.4
Minimum aperture f/16
Minimum focusing distance 38 cm
Magnification 0.09×
Filter size 62 mm
Size ∅ 77.7 × 75 mm
Weight 510 g
Notes
AF speed N/A
AF sound
Internal focusing yes
Internal zoom N/A
Fix front lens yes
Mount type metal
Weather sealed no
Drop in filter no
Ultrasonic AF no
Stepping motor AF no
APS-C sized circle no
Low dispersion lens element yes
Hard case N/A
Soft case VFC4206 (included)
Lens hood VFC4247 (included)
Tripod adapter not included
Leica D SUMMILUX 25mm f/1.4 ASPHERICAL Specification

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