Next-Gen Rear-Mount Filter System from Aurora Aperture

Aurora Aperture Inc. has introduced a next-generation rear mount filter system that promises to successfully solve a common problem from ultra-wide-angle lens users. 

The solution seems simple enough. Put the lens filter on the backside of bulbous ultra-wide-angle lenses lacking a front filter thread. Users of these style lenses would normally have to use either low-quality gel filters in the rear of the lens or otherwise use a massive front mount filter with sizes up to 186mm mounted onto a bulky adapter. 

Those of you who have these lenses likely know this pain? 

The idea is not a brand new one for Aurora Aperture. The company announced in 2017 a rear mount filter system, an industry-first, for the Canon EF 11-24 mm F4L USM called the CR (Canon Rear Mount) filter set. 

The photography gear start-up company out of Irvine, California is quite excited for the upgrades made for this release, calling the new filter system a “major upgrade,” according to Jeff Chen, founder, and CEO. 

“It expands supported lenses to several other popular ultra-wide-angle lenses, at the same time adds more filter choices, Chen said in a press release. “More importantly, the new system features a robust magnetic quick-release mechanism.”

Having more filter options for more supported brands as well as a really slick magnet-based design is at the forefront of the new system.

Filter Options
Filters in the system will include a number of ND filters, a graduated ND filter, and a light pollution filter. A required magnetic mount attaches to the back of the lens, then acts as a ‘quick release’ for which to attach the filter. The filters are constructed from high-quality Schott D 263 T eco thin glass with multi-layer nano-coatings for their light reduction capability, resulting in accurate color rendition and minimizing field curvature. 

“These filters can meet the high-resolution demands of 4k/8k video, and the high pixel density of modern-day sensors,” the company said. 

Supported brands and lenses include the following: Canon 11-24mm F4L USM (and other select Canon wide-angle lenses), Nikon 14-24mm f/2.8G, Sigma 14-24mm F2.8 DG HSM Art EF mount and Sigma 14mm F1.8 DG HSM Art EF mount lenses, Sigma 14-24mm F2.8 DG DN Art E and L mount, and Sony 12-24mm F4 G.

The rear mount filters will be available through a Kickstarter crowdfunding campaign this month. Pricing will be between $43 and $113 per filter with the required lens adapter at between $35 and $41 depending on the lens.

Kenton Krueger








Kenton Krueger has spent the past several years guiding backpackers, hikers and photographers into the wild places of the American West such as Grand Canyon, Yellowstone, Yosemite, Glacier, Katmai, Zion, Bryce Canyon, Arches, Canyonlands National Parks, as well as internationally in Costa Rica & Brazil. In addition to backpacking and camping, his adventures include rock climbing, exploring the slot canyons of southern Utah, mountain biking, and bagging 14ers in Colorado’s San Juan Mountain Mountain Range. Kenton is a trail runner, former pilot, and spent roughly five years writing and photographing for the award-winning Omaha World-Herald newspaper, out of his hometown, Omaha, Nebraska. Kenton looks forward to utilizing his years of trip leading and guiding experience, combined with his passion and experience behind the lens, to provide memorable and unforgettable experiences at the wild places we will visit together.