If you are a Micro 4/3 shooter looking for a 50-100mm-equivalent zoom lens, the just-announced Leica DG Vario-Summilux 25-50mm f/1.7 ASPH might be the perfect fit for you. This lens pairs the useful focal length range with an impressively bright constant f/1.7 maximum aperture, advanced optics, and a portable form factor.
It also sports a physical de-clicked aperture ring which exactly what you want when shooting video in constantly changing light conditions.
The optical design of the Leica DG Vario-Summilux 25-50mm f/1.7 ASPH consists of 16 elements in 11 groups. One aspherical element, three extra-low dispersion elements, and one ultra high-refractive index element all combine to produce well-controlled imagery void of color fringing, chromatic aberrations, and spherical aberrations.
The rounded nine-blade diaphragm contributes to a smooth and pleasing bokeh quality. The lens also offers linear AF motor, and an internal focusing system delivering quick and quiet focusing performance along with virtually no focus breathing throughout the focusing range from 11″ to infinity.
The focus clutch mechanism, on the other hand, allows for intuitive switching between AF and MF modes, simply by sliding the focusing ring, and if paired with select Lumix cameras, Focus Ring Control can be used to tune the focus rotation feeling.
Just like the Leica DG Vario-Summilux 10-25mm f/1.7 ASPH, the 25-50mm f/1.7 counterpart shares the same 77mm filter ring diameter and has unified color rendering for seamless switching between the two lenses.
The unit has a minimum focusing distance of 28cm and a maximum magnification ratio of 0.42x. It also provides splash, dust, and freezeproof design while weighing in at 1.4 lb/654 g.
Leica DG Vario-Summilux 25-50mm f/1.7 ASPH Highlights
- Micro Four Thirds System
- 50-100mm (35mm Equivalent)
- Aperture Range: f/1.7 to f/16
- One Aspherical Element
- One UHR Element, Three ED Elements
- Linear AF Motor, Focus Clutch Mechanism
- Stepless, De-Clicked Aperture Ring
- Splash, Dust, and Freezeproof Design
- Rounded 9-Blade Diaphragm
The Leica DG Vario-Summilux 25-50mm f/1.7 is already available to pre-order retailing for $1,797.99.
B&H Pre-Order Link: