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• EF-Mount Lens/Full-Frame Format
• Aperture Range: f/2.8 to f/22
• Three FLD Elements, Three SLD Elements
• Three Aspherical Elements

• EF-Mount Lens/Full-Frame Format
• Aperture Range: f/1.4 to f/16
• Four Low Dispersion Elements
• Three Aspherical Elements

• EF-Mount Lens/Full-Frame Format
• Aperture Range: f/2.8 to f/22
• Three SLD Elements
• Four Aspherical Elements

• EF-Mount Lens/APS-C Format
• 17.6-25.6mm (35mm Equivalent)
• Aperture Range: f/2.8 to f/22
• Two Aspherical Elements

• 360-Degree Rotation
• For 4- and 8-Sided Softboxes
• Color-Coded Pole Sockets
• Sturdy Metal Construction

The Profoto RFi Speedring Adapter for Propet A 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 the light on the fly. The color codes make the softboxes easy to assemble and disassemble and this speedring adapter is robust and painted with heat resistant lacquer.

• Oversized Eyecup
• Seals Out Ambient Light
• Self-Locking Mount Keeps Eyecup Secure
• Slides over Eyepiece Mounting Rails
• Compatible with Canon 10D, 20D, 30D, 40D, 50D, 60D, 70D, 80D, 1D, 1D Mark II, 1Ds Mark II, Rebel SL1/100D, Rebel T5/1200D, Rebel T6/1300D, Rebel T6s/760D, Rebel T6i/750D, Rebel T5i/700D, Rebel T4i/650D, Rebel T3i/600D, Rebel T2i/550D, Rebel T1i/500D, Rebel XS/1000D, Rebel XSi/450D, Rebel XTi/400D, Rebel XT/350D, Digital Rebel/300D

• Oversized Eyecup
• Seals Out Ambient Light
• Self-Locking Mount Keeps Eyecup Secure
• Slides over Eyepiece Mounting Rails

•  protect from dust, smudges, scratches 

• 150 Watts
• Average Life of 1000 Hours
• Produces Approximately 2800 Lumens