Panasonic Leica Vario-Summilux 10-25mm F1. 7 Panasonic announced that it would be building a 10-25mm F1. 7 zoom back at Photokina in later 2018 and has a mockup on show at CP+ in Yokohama. The red box on the label says 'Development Announcement' in Japanese.
If nothing else, it's a striking way to confirm the company's commitment to the Micro Four Thirds system as a high-end format.
Scarce details
Very little additional information has been given, but the mockup shows it will have a dedicated aperture ring like the Panasonic Leica 15mm F1. 7 prime. The mockup also makes clear just how much larger it's going to be than the 12-60mm F2. 8-4. 0.
Five primes in a tube
Panasonic seems committed to its 'five primes in one lens' concept, by marking the 10, 12, 14, 18 and 25mm focal lengths on the zoom ring, representing 20, 24, 28, 35 and 50mm equivalent focal lengths that are popular choices for prime lenses. This shouldn't be taken to mean the lens will only offer these focal lengths, though.
For video, as well as stills
While the 'five primes' idea is a great way of appealing to photographers, we suspect plenty of videographers will also be interested in the idea of a lens that gives them a wide-angle to normal field of view with a constant F1. 7 aperture, meaning no need to change lenses (or change any rigging built around the camera), between shots. Sadly there are still no details of either price or availability.
. dpreview.com2019-3-3 08:55