A French website publsihed the full french press text of the new Panasonic 10-25mm f/1.7 lens. Here you have the google translation
The arrival of a new optics in micro 4/3 is always an event in itself. A fortiori when it covers a wide-angle beach and / or it claims a constant opening. This is the case of the new Leica 10-25mm optics which equates to a focal range of 20 to 50 mm (35 mm equivalent) and which, above all, offers a constant opening of F1.7. This opening should be very interesting for videographers with a rendering that Panasonic describes as “cinema”, in any case that should favor bokeh, and low light conditions.
The new Leica optics (actually Leica licensed), consisting of 17 elements in 12 groups, including 3 aspherical lenses, 4 ED lenses, and 1 UHR lens, works according to Panasonic “as the assembly of several lenses with fixed focal lengths , favoring dynamic landscapes like portraits “. The optics, which remains compact but not so light (690 grams), would reduce chromatic aberration and spherical distortion.L-rumors.com
Compatible with a sensor up to 240 images / s maximum, it allows to obtain a rapid autofocus. On the other hand, it is not stabilized, which however is not a major concern if the sensor is stabilized on its side.
In addition, the focus of the internal focus of the new lens is silent, thus favoring video recording. This silence is achieved by a continuous open ring notched and a stepper motor.
The Leica would also benefit from a mechanism that eliminates pumping out of focus, a problem of all interchangeable lenses designed for photography only.
The optics are announced as robust, and tropicalized, that is to say more specifically can withstand splashing and dust. The diameter of the filter is 77mm.
Reference / Price / Availability
Reference: LEICA DG VARIO-SUMMILUX 10-25mm / F1.7 ASPH. (H-x1025)
Price: X-1025E: 1999 €
Availability: July 2019
Note: Also the Panasonic S1H press release has been leaked and can be read on L-rumors.com