The Leica Summilux-M 28mm f/1.4 ASPH. rounds off the range of high-speed M wide angle focal lengths. It offers exce lent image performance over the entire image field even at full aperture and in the close-up range thanks to a "floating element". With its exceptional contrast, the lens delivers the same recognized high performance level as the Leica Sum- milux-M 35mm f/1.4 ASPH., and in some respects actually outperforms it. The vignetting that is typical of every optical system is naturally more defined on a wide angle lens, particularly a high speed one like this, than on standard lenses or those with a long focal length. At full aperture in 35mm format it is a maximum, i.e. in the corners of the image, of around 3.4 stops, around 2 stops on Leica M8 models with their slightly smaller format. Stopping down to 5.6 visibly reduces this light falloff - to 1.8 and 0.8 stops respectively. Stopping down further does not bring about any notable reduction as essentially only the natural vignetting remains. Distortion is extremely low for a wide angle lens at a ma- ximum of 1.1% , which is rarely noticeable in practice. A total of ten lens elements are used to achieve this exceptional performance. To correct color defects, seven of these are made of glass types with anomalous partial dispersion, while one has an aspherical surface. To maintain performance in the close-up range, one element towards the rear of the optical system is a "floating element" that moves independently of the rest of the mechanism.
- Product Type Lens
- Manufacturer Part Number 11668
- Manufacturer Leica Microsystems GmbH
- Product Name Summilux-M 28mm f/1,4 ASPH
- Product Line SUMMILUX-M
- Brand Name Leica
- Application/Usage Camera
- Package Contents
- Summilux-M 28mm f/1,4 ASPH
- Lens Hood
- Compatibility Leica M-mount Rangefinder Cameras
- Weight (Approximate) 15.52 oz
- Length 2.6"
- Diameter 2.4"
- Lens Type Fixed Focal Length
- Filter Attachment Diameter 49 mm
- Fixed Focal Length 28 mm
- Lens Mount Type Leica M
- Maximum Aperture Fixed 1.4