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General
Lens Mount1: PL   
Focal Length Wide: 45  
Focal Length Long: 250   
Focal Length Ratio: 5.6  
Aperture: T2.6 – T22   
Close Focus2: 1.2 m / 3‘11“
Magnification Ratio3: 1:4
       
Entrance Pupil6       
at 18 mm: 234.4 mm / 9.6″  
at 50 mm: 2.0 mm / 0.1″” 
at 80 mm: -101.5 mm / -4.0″”  
       
Angle of View H – V – D, Normal 358, ID = 27.20 mm7
at 18 mm: 27.5° – 20.2° – 33.6°   
at 50 mm: 8.4° – 6.1° – 10.4°
at 80 mm: 5.0° – 3.7° – 6.2°  
       
Angle of View H – V – D, ALEXA/D-21 HD8, ID = 27.26 mm7
at 18 mm: 29.6° – 16.9° – 33.7°   
at 50 mm: 9.1° – 5.1° – 10.4°  
at 80 mm: 5.4° – 3.1° – 6.2°   
       
Angle of View H – V – D, ALEXA 2K10, ID = 29.08 mm7
at 18 mm: 31.4° – 18.0° – 35.8°   
at 50 mm: 9.7° – 5.4° – 11.1°    
at 80 mm: 5.8° – 3.3° – 6.7°   
       
Angle of View H – V – D, DIN Super 3511, ID = 30.00 mm7
at 18 mm: 29.9° – 22.6° – 36.9°   
at 50 mm: 9.1° – 6.9° – 11.4°   
at 80 mm: 5.5° – 4.1° – 6.9°   

Physical
Length4: 370 mm / 14.6″” 
Front Diameter5: 134 mm / 5.3“   
Maximum Housing Diameter: 153 mm / 6“   
Weight: 7.5 kg / 16.5 lbs    
       
Environmental       
Operation Temperature: -10°C to +50°C / +14°F to +122°F       
Storage/Transport Temperature: -20C to +60°C / -4°F to +140°F