You can now buy the new next Gen Rear Mount Filters for the Sony 12-24mm G lens on Kickstarter (Click here to see all details).
Aurora Aperture’s next-generation rear mount filter is a revolutionary filter system for lenses that do not have a front filter thread or otherwise would require expensive large-diameter filters on an adapter.
Some ultra wide-angle lenses do not have a front filter thread. For these lenses, users would have to use either low-quality rear-mounted gel filters or use of a bulky filter adapter with massive front mounted filters that often come in sizes as large as 186mm.
The next rear generation rear mount filter system improves usability by using an innovative magnetic quick-release structure which eases installation and removal from the lens.