see also:

• Olympus mZD 7-14mm f/2.8 PRO lens

• ultra wide angle MF prime lens for Micro Four Thirds system
• light weight and wide field of view potentially makes it a candidate for drone photography

• rectilinear
• 7.5mm focal length = 15mm in full frame terms giving 110° ultra wide angle of view
• f/2.0 widest aperture
• 46mm filter thread
• manual focus only
• close focus to 12cm
• 50mm x 55mm long
• 170g or 200g versions
• $

• http://mirrorlesscomparison.com/micro-four-thirds-lenses/laowa-7-5mm-mft-wide-angle-zooms/
  • their initial lens was de-centered so not great for astrophotography but a 2nd lens was pretty good in the corners with only mild astigmatism making it a very good lens if you get a good copy
  • quite susceptible to flare and ghosting
  • practically as sharp and optically as good as the excellent f/2.8 Olympus 7-14mm zoom even at f/2.0
  • some barrel distortion but overall it is well-contained
  • traces of chromatic aberrations especially along the edges and in the corners
• https://www.ephotozine.com/article/venus-laowa-7-5mm-f-2-mft-lens-review-31253
• https://www.youtube.com/watch?v=Bcs3WC9Rd9Q