JVC VR-609U Relationship between focal length and field of view, 1/3, Formula, Lens focal length

Line-up Chart

Technical Information http://pro.jvc.com

12 Relationship between focal length and field of view

1/2 "1/3 "

Lens focal length

Color Camera

Storage

Flat &

Simplified chart

Lens focal	Horizontal	Vertical
length (mm) angle of video		angle of video
	(degree)	(degree)
3.6	81˚	66˚
4.8	67˚	53˚
6	56˚	44˚
8	44˚	33˚
12	30˚	23˚
16	23˚	17˚
69	5.3˚	4˚
100	3.7˚	2.7˚

3.62.8

4

Simplified chart

Lens focal	Horizontal	Vertical
length (mm) angle of video		angle of video
	(degree)	(degree)
2.8	81˚	66˚
4	62˚	48˚
4.8	53˚	41˚
6	44˚	33˚
8	33˚	25˚
12	23˚	17˚
16	17˚	13˚

Monitor	Panel Display
Products	IP Security
Information	System
Information	Technical

(m) 10
	9
(W)	8						.6	m	m					m
						3							m
	7				=							.8
				f
object										=	4					m
															m
	6								f					6
													=				m
												f
																m
	5															8
															=
															f
of	4																	mm
																	12
Width																	f=		m
																		m
																		16
	3																f=
	2
																		f = 48 mm
	1
																		f = 100 mm
	0	2	3				4					5				6	7	8		9	10
	1
						Distance															(m)
	between object and camera (L)

(m) 10
	9
(H)	8
								.6	m	m
	7
object						=	3						m
	6				f							.8	m
										f		4		mm
											=
	5												6
												=
of												f				m
														8	m
	4													=
Height													f					m
																	m
																12
	3													f	=			m
															f=		16	m
	2
																f = 48 mm
	1
																f = 100 mm
	0
		2	3	4					5			6		7			8	9	10
	1
				Distance															(m)

between object and camera (L)

6

8

12

60

80

(m) 10
	9
(W)	8					. 8	m	m
					2
	7			=								m
											m				m
object			f							4				m
									=				.8
	6							f
											=	4				m
										f					m
	5													6
													=				m
												f
of																m
																8
															=
	4													f
Width																			m
																		m
																	12
	3															f=		16	mm
																f=
	2
	1																f = 48 mm
	0	2	3			4				5			6			7		8	9	10
	1
				Distance																(m)
	between object and camera (L)

(m) 10
	9
(H)	8
									m	m
	7
object							.	8
									f
						=	2									mm
															.8
	6				f						m		=	4
										4	m
												f
	5									=
of													6			m
														m
	4											=
Height											f						m		16
																m
															8
													=
	3												f
																			m
														f=			12	m		mm
	2																f=
	1															f = 48			mm
	0
		2	3	4			5			6			7				8		9		10
	1
				Distance																	(m)

between object and camera (L)

Glossary

• This shooting is an image that was taken with a distance of 10 meters between object and camera.

Index

Formula	W	W =	X	x L
			f
	H	H =	Y	x L
			f
L		( H =	3	W )
			4

•Image range of monitor (width, height and angle) is 10 % less than that of actual data.

•Due to distortion that occurs with a wide-angle lens, actual angle of taken image will be wider than calculated value.

Parameter chart

CCD size	1/2"	1/3"	1/4"
X	6.4	4.8	3.6
Y	4.8	3.6	2.7

W = Width of video (m) H = Height of video (m)

f = Focal length of lens being used (mm)

L = Distance between object and camera (m)

40 JVC Video Surveillance Products 2006-2007