Handevision IBELUX 40mm f/0.85 manual focus lens

introduction

introduced in 2014
a high quality manual focus lens designed for cropped sensor cameras utilising telecentric optical design and is the widest aperture lens in terms of f ratio designed for mirrorless cameras
interesting optical design includes a concave front element
available in Sony NEX, Fuji X, Canon EOS M and Micro 4/3 digital mirrorless camera mounts
see manufacturer's web page: http://kipon.com/en/articledetail.asp?id=60

manual focus
aluminium body
40mm f/0.85
- ⇒ full frame DOF and FOV equivalents:
  - 60mm f/1.3 on DX;
  - 64mm f/1.4 on APS-C;
  - 80mm f/1.7 on MFT
image circle 28.4mm
10 elements in 8 groups
10 circular blades
67mm filter
built-in lens hood
optimised for focus at 2.5m giving 1.6 x 1.1m subject size using a APS-C camera
close focus to 0.75m giving a subject size of 60cm (1:20 macro) using a APS-C camera
significant vignetting wide open
lateral CA 6micron
relatively soft wide open, sharpest at f/5.6
74mm diam x 128mm long
1150g
MSRP is $2,080 USD