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Canon HJ21eX7.5BIASD 2/3" HD Broadcast Lens

HD 7.5-158mm E.F.P type broadcast zoom lens, servo zoom/focus, XS digital drive, 2X ext, macro

The HJ21ex7.5B is a production portable lens having the widest field of view among the standard telephoto series of lenses. It is a replacement for the highly popular HJ21ex7.8B lens. It a strategic member of the family of seven HD portable EFP lenses offered by Canon that collectively offers an unusually broad range of creative options.

This particular lens was optimized for the highest EFP performance. Its relatively large input section includes innovative optical compensation to reduce focus breathing to an extremely low level. It is intended for producers and broadcasters having as their foremost priority a long focal length capability, wide-angle field of view, and exceptional optical performance. This has been achieved in a modest 5.65 lbs overall package. The optional flexibility of Canon’s Crossover aspect ratio switching system makes it a superb performer for both 16:9 widescreen and standard 4:3 image formats.

HJ21eX7.5BIASD


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Details

Specifications

IMAGE COMPOSITION HJ21ex 7.5B Series
Object Image Format 2/3 Inch 16:9 Aspect Ratio
Object Image Size (Presented
to Camera Imagers)
9.59 mm (H) x 5.39 mm (V)
Zoom Ratio 21 X
Focal Length Range 7.5------------158mm
with Extender 15-------------316mm
Angular Field of View :  
At 7.5mm 65.2° (H) x 39.6° (V)
At 158mm 3.5° (H) x 2.0° (V)
With Extender :  
At 15mm 35.5° (H) x 20.4° (V)
At 316mm 1.7° (H) x 1.0° (V)


 

SCENE COMPOSITION HJ21ex 7.5B Series
Minimum Object Distance
(MOD) (From Front of Lens)
0.85 Meter (10mm with Macro)
Minimum Object Distance
(MOD) (From Camera Image Plane)
1.16 Meter
Scene Object
Dimensions at MOD
 
At 7.5mm 120.4 cm x 67.7 cm
At 158mm 5.6 cm x 3.2 cm
With Extender  
At 15mm 60.2 cm x 33.9 cm
At 316mm 2.8 cm x 1.6 cm


 

OPTICAL BRIGHTNESS HJ21ex 7.5B Series
Maximum Relative Aperture  
(F-Number)  
At 7.5mm-------116mm 1 : 1.9
At 158mm (Ramping Characteristic) 1 : 2.6
with Extender  
At 15mm------232mm 1 : 3.8
At 316mm (Ramping Characteristic) 1 : 5.2

PHYSICAL ATTRIBUTES HJ21ex 7.5B Series
Size    
Width 179.9mm 7.1in
Height 122.3mm 4.8in
Length 260.1mm 10.2in
Weight 5.81lbs 2.63kg