see also:

• a catalogue of Micro Four Thirds lenses
• Olympus mZD 7-14mm f/2.8 PRO lens
• Panasonic Leica DG 10-25mm f/1.7 lens MFT

• ultra wide angle zoom lens for Micro Four Thirds system covering 16-36mm fov in full frame terms
• announced April 2017
• although not as wide as the Olympus mZD 7-14mm f/2.8 PRO lens, this allows one to use a filter which is not possible on the 7-14mm without a special large filter adapter, and thus makes this lens better suited to landscape work where a gradient ND filter can be useful

• 8-18mm f/2.8-4.0
• 15 groups of 10 lenses (3 aspheric lenses, 1 aspheric ED lens, 2 ED lenses and 1 UHR lens)
• weathersealing
• close focus 0.23m giving 0.12x macro
• 240fps AF speed
• 'barycentric stability' - whatever is in the center of the image at one focal length remains exactly centered as the lens is zoomed in and out
• micro-step drive system in the aperture control to allow the camera to smoothly open and close the aperture
• Nano coating
• 67mm filter
• 73.4 mm × 88 mm long
• 315g
• $US1099

• https://www.dpreview.com/news/6159105527/hands-on-with-the-panasonic-leica-dg-vario-elmarit-8-18mm-f2-8-4
• http://www.photobyrichard.com/reviewbyrichard/leica-dg-vario-elmarit-8-18mm-f2-8-4-0-asph-review/
• https://www.cameralabs.com/leica-dg-8-18mm-f2-8-4-review/
  • not as wide and not quite as sharp in the corners as the Olympus 7-14mm at wide apertures but has other advantages - ability to use filters, much lighter, while the longer focal length can be very handy