Sigma patents 500mm f/4 lens

Sigma filed a patent in Japan for a new 500mm f/4 lens. Sigma currently has a 500mm f/4.5 EX DG APO HSM model that was announced back in 2005:

Patent details:

  • Patent: 2011-70043
  • Patent filing date: Sept 28, 2009
  • Focal length: 489.9938
  • Aperture: 4.1004
  • Angle of view: 5.0498 °
  • Back Focus 90.3449mm

Source

This entry was posted in Sigma and tagged . Bookmark the permalink. Trackbacks are closed, but you can post a comment.
  • FCC disclosure statement: this post may contain affiliate links or promotions that do not cost readers anything but help keep this website alive. As an Amazon Associate, I earn from qualifying purchases. When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network. Thanks for your support!

  • Back to top