By: SecOptx
Security & Machine Vision Optics
Contact us for lowest price (800) 284-2288, (858) 565-1101,, or fax (858) 300-4193
8.5-51mm Vari-focal Lens
The SecOptx HVC851V is a 8.5-51mm vari-focal lens.
8.5-51mm vari-zoom lens
C-Mount (Also available in CS-Mount)
1/2" Format
Compatible with 1/2", 1/3" and 1/4" cameras
Vari-zoom allows for focus tracking throughout zoom range
Focal Length 8.5~51mm
Max. Relative Aperture 1:1.6
Iris F1.6~ Approx. F360 with ND Spot Filter
Auto-Iris Input Signal Composite Video Signal or Video Signal
Input Impedence High Impedence
Sensitivie Adjustment Image Signal Level 0.5~1.5Vp-p
Auto-Iris Accuracy With Input Video Signal 0.7Vp-p within ±10% of Mean value
Ratio 6X
Angular Field of View 1/2": 41.3° x 31.5° @ 8.5mm, 7.2° x 5.4° @ 51mm
1/3": 31.5° x 23.9° @ 8.5mm, 5.4° x 4.0° @ 51mm
1/4": 23.9° x 18.0° @ 8.5mm, 4.0° x 3.0° @ 51mm
Minimum Object Distance(M.O.D.) 0.8m (From Front Vertex) Optical
Back Focal Distance 15.89mm (In Air)
Flange Back 17.526mm
Operation Zoom Manual
Focus Manual
Iris Auto (DC± 8V~16V, Fixed Voltage Max 40mA) Auto Close System, Speed 4 sec.
Operation Temperature -10 - 50°C ( 14 - 122°F)
Filter Size 37.5mm P0.5
Mount C-Mount (Adjustable Lens Position)
Size, Approx. 48 x 59 x 72.6mm / 1.9 x 2.3 x 2.9in.
Weight 140g, 4.9oz
Notes CS-Mount version = HVCS851V

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Prices and specifications subject to change without notice.