Leica has announced the first two optics in a new line of Summicron-SL lenses for its SL-System, introducing the APO-Summicron-SL 75 mm f/2 ASPH. and the APO-Summicron-SL 90 mm f/2 ASPH.
Both new Leica SL lenses will be available in February and are aimed at portrait photographers.
Leica says both its new Summicron-SL lenses offer fast and silent autofocusing, thanks to a newly developed AF system that also promises a shorter close focusing limit.
The autofocus drives of the new Summicron-SL 75mm and 90mm f/2 lenses boast a stepping motor with a Dual Syncro Drive, which Leica says enables the AF system to travel the entire focusing range in just 250 milliseconds.
Leica says the new Summicron-SL 75mm and 90mm f/2 lenses are also Apochromatic, or APO corrected, meaning that they are designed to capture images in high-contrast light and reduce the effects of chromatic aberrations and colour fringing.
The new Leica Summicron-SL lenses are comprised of 11 elements, one of which is aspherical, featuring anomalous partial dispersion and are manufactured from sensitive and specially formulated, high-quality glass, Leica says.
The APO-Summicron-SL 75 mm f/2 ASPH. will be available from 25 January 2018, and the APO-Summicron-SL 90 mm f/2 ASPH. from 8 February 2018, priced at £3,750 an £4,100 (including VAT) respectively.
| Lens | APO-Summicron-SL 75 mm f/2 ASPH. | APO-Summicron-SL 90 mm f/2 ASPH. |
|---|---|---|
| Angle of view | 31.8°/26.7°/18.0° | 27.3 / 22.9 / 15.4 ° |
| (diagonal, horizontal, vertical) | ||
| Optical design | ||
| Number of elements/groups | September 11, 2018 | September 11, 2018 |
| Number of asphericals | 1 | 1 |
| Position of entrance pupil in front of the bayonet flange | 35.4 mm | 22.9 mm |
| Focusing | ||
| Working range | 0.5 m to infinity | 0.6 m to infinity |
| Smallest object field | 120 × 180 mm | 120 × 180 mm |
| Largest reproduction ratio | January 1, 1970 | January 1, 1970 |
| Aperture | ||
| Settings/functions | Electronically controlled iris, setting with the camera clickwheel control, half-stop settings possible | Electronically controlled iris, setting with the camera clickwheel control, half-stop settings possible |
| Aperture setting range | February 1, 2022 | February 1, 2022 |
| Smallest aperture | 22 | 22 |
| Bayonet/sensor format | Leica L-bayonet, full-frame 35 mm format | Leica L-bayonet, full-frame 35 mm format |
| Filter thread | E67 | E67 |
| Dimensions and weight | ||
| Length to bayonet flange | 102 mm | 102 mm |
| Largest diameter | 73 mm | 73 mm |
| Weight | 720 g | 700 g |