Recon 
Hybrid Variable ND Filter System
Date December 2022
Company PolarPro
Recon is a hybrid variable neutral density (VND)  filter system that blurs the lines between a traditional thread-on filter and a cine matte box. Incredibly versatile, Recon can be configured for a wide range of shooting environments and setups.
Design
Recon's VND 3-6+ Core Filter features an independently-rotating ring that controls the strength of the VND–by rotating independent of the camera's optical axis, the hood can remain stationary when attached to the front of the VND filter. A spring-loaded ball bearing nests into a detent at six stops of optical density, requiring the user to push past in order to achieve higher strengths of ND. This is a safety feature, as pushing past six stops results in vignetting when shooting at a focal length below 35mm. The outwardly flared profile of the VND was necessary to allow for the use of click-in effects filters without causing vignetting. These filters utilize two spring-loaded sliders that a user pinches to install, and can be rotated three-hundred and sixty degrees to modify the effect that they are providing. 
Materials
Aluminum, Stainless Steel, Glass, TPE, Nylon, Carbon Fiber
Processes
CNC Milling, Injection Molding, Anodization, Laser Etching, Aluminum Extrusion

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