Profoto 100504 RFi Speedring for Bowens/Calumet Other Heads including Moisture-Resistant Construction and Fluorine

including Moisture-Resistant Construction and Fluorine Coating for added durability

A hand-holdable full-frame 500mm lens that defies conventional wisdom

Size (W x L)1 x 3'/30 x 90 cmShapeStrip

LD (Low Dispersion) and Hybrid Aspherical lens elements thoroughly controls aberrations including axial chromatic aberrations

Provides up to 450 full-power flashes depending on the A-series model

Profoto 100504 RFi Speedring for Bowens/Calumet Other Heads including Moisture-Resistant Construction and FluorineThe Profoto RFi Speedring Adapter for Bowens Calumet Aurora Fomex makes the RFi softboxes compatible with well over 20 different flash brands, ranging all the way from speedlights to high end studio strobes. Even if you own flashes from many different manufacturers, you now only need one brand of softboxes. The Profoto RFi Speedring Adapter is designed so that the RFi softboxes can be rotated 360 degrees, allowing the photographer to adjust and shape