The Schneider 28mm f/5.6 Super-Digitar XL SES is an ultra high quality wide angle lens with an electronic shutter designed to maximize the capabilities of adjustable cameras with sensor formats up to 6.0 x 4.5cm. The electronic shutter offers numerous advantages over standard analog mechanical shutters. Most importantly, it's more precise, offering shutter speeds in finer increments with unmatched repeatability. It also offers remote control features via a connected computer not possible with traditional shutters.
The 28mm Super-Digitar SES is expressly designed for digital imaging and discerning photographers who wish to use its large image circle to correct perspective and avoid image degradation in post-production. The optic's full coverage of 115°/90mm is reached at reached at f/8 at which point the lens is free from mechanical vignetting. Schneider utilizes apochromatic correction of the 10 element double Gaussian lens design to achieve high contrast with an impressive resolution of 80 line pairs at f/8.
Note: Mounts on a Copal #0 lens board.
- Electronic Shutter
- The Schneider electronic shutter offers a number advantages over the mechanical shutters previously used in analog photography: First, it is more precise. Second, it has a remote control feature via the connected computer. Third, it provides a much wider setting range and new functions for the control of the depth of field and for extremely long exposure times.
- Double Gaussian Design
- The double Gauss lens consists of two back-to-back Gauss lenses (a design with a positive meniscus lens on the object side and a negative meniscus lens on the image side) making two positive meniscus lenses on the outside with two negative meniscus lenses inside them. The symmetry of the system and the splitting of the optical power into many elements reduce the optical aberrations within the system.
- Apochromatic Design
- In photography, chromatic aberration produces soft overall images, and color fringing at high-contrast edges, like an edge between black and white. Apochromatic lenses are designed to bring three wavelengths (typically red, green, and blue) into focus in the same plane. The result is superior color accuracy and apparent sharpness and a reduction in chromatic and spherical aberrations that negatively affect performance.