How Far Can a PTZ See?

Author: John Honovich, Published on Sep 22, 2012

Knowing how far a PTZ can see is a critical but tricky question for PTZ use. On the one hand, seeing very far away is a common reason for choosing PTZs. On the other hand, we regularly hear people radically overestimate how far one can see with a PTZs (hundreds of meters and miles are commonly claimed).

In this note, we break down four key issues in determining how far a PTZ can see:

  • *** *** **** ** ** **** ******** **** *** **** to ***
  • *** ******* **** ****** *** **** **********
  • *** *** **** ******* ************* **** ****
  • *** ** ** **** **** ** ** *********

What *** **** ** ***

**** *** *****, ** *** ****** **** ***** **** **** critical ****. *** **** ** ***** ** ***** ***** **** you **** ** '***' - ** ** *** ******* ** a *** ** * ******* *****, *** ******** ** * person ** *** ******* ** ***** ****, ***. *** ********** here ** *******. **** *** ***** ** ***** ******* *** might ** **** ** *** ******** ** ****** ** ****, with *** *****, *** ***** ** ***** ** *** ** meters.

** ** *****, **** ** *** **** *** *********** * 'regular' ***** ****** *** *** ********** ** **** ******* ** overcomes ****. *******, **** *** *** ** ****** ** *** the ***, ** ******* * '*******' ***** ****** **** * very ****** ***. **** **** *** ***** ******, ** **** point, *** **** ** *** ****** ************* ******* *** ******* one *** '***' **.

Example: *** **** '****' **** ***

************* ********* ******* ***** **** ********** ****** *********. *** ********, an**** *********** ***** **** **** **,*** ********** **** ** "**** **** ***** *** **** **** *** zoom **** *** **** ***** *.* ** (* ****) ****." This ** *******, *****? ******* **** * **** ****. **** kind ** ***** ******* *** **** *** *******? *******, *** video ***** **** ** *** **** ** ******* *** **** **** ******, ***** *****:

text shown

**** ****** ** ****** ** **** ** ** ***** ***** being - ***** * ** * **** **** ** ~**,***% greater **** *** **** ** ******* ***** **********. ** *** are **** ** *** *.*% ** **** ********* *** *** using **** ** **** *** ***** *** ** *******, **** is *****. *** ******** ****, **'* ********* ** ****.

****** ****, ***** *** *** ***** ***** **** ******* *** need ** ***, *********** *** *** *** *** *** ** a ****** ********.

Why ******* **** ****** *** **********

** **** *** **** ****** *** ***** **** * *** zoom ****** *** *** * ***** ** **** ** * 32x **** ****** ******* *** ****** ****** ** ** '****' than *** ******. **** ** ********** ******. ** **** *****, the *** ****** *** **** *** **** ******** **** **** the *** ****. ******, ** **** ***** *** ***** **** camera *** *** *******.

******* *** *** *** ******** ***:

  • *** ******* (**** *********) **** *****
  • *** ***** ********** ** *** ******

*** **** ********* *** ***** ******* ****** *** **** ********* FoV. ** *** **** ** *** ***, *** ***** *** the ****** *** *** **********. **** *** **** *** ** the **** ********* ***** ** ****, **** ********* ** *******. Below ** ** ******* **** * ************ **** *****:

range example

** **** *******, *** *** ****** ** *** ******* (** the ****, *.*), *** **** ********* ***** *** ****** ********. Focus ** ******* ****** **** *********** ** **** ******** *** differences ** ******'* ***** ****** (**** **** **** ** * 35x ****** (*** / *.* = **)). *** ******* *** degree ** *** **** ********* ********** ***, *** ******* * PTZ **** ****** *** (******** *** **** **********).

*******, ********** ** **** ***. ** *** ****, **** *** PTZs **** **, *** ***** ** **** *** ***. ***, HD **** **** *** ***** ******* **** ****** *** ************ equal ** ******** ******* ** *** ****** *** *********. **** is ******* *** ********* ********** *********** *** * ******** ***** maximum ***. *** ***** ** ** **** ******* *** *******.

Why *** ******* ********** **

******* **** ******* ******* **** ***** ******* ** ***** *** foot (***) ** * ****** ** ***** ************** **** **** ******, **** ** ******** ******** *** *** ********. ** ******* lighting, *** ***** **** ** *** ** ******** ****** ******* but **** ******* ** ****** ***, **** *** **** ** 70 ** ***** *** ** ***** *** **** *** ** 150ppf (** *** *** ** **** ** *** ******** ** all).

** **** ***** **** ****. *********, *** ************ ****** * 'normal' ***** ****** **** * ******* **** ***** ****. *******, when **** **** *** ****, **** **** ** *** ********** long ****** (*****+ *** ******) *** **** ****** **** ********* (hundreds ** **** ** ***** *****). **** ******* **** **** issues - * **** ** **** ****** ******* *** **** light ** ********; ******** ******* **** ******, *********** ****** *** magnified, *** ***** *** *****, ***.

****'* ** ******* **** *** **** ** ~*** **** ******** with ~****** ** *** ****** ** *** ***. *** ***** quality ****** ** *********** - **** * ******** ***** (** ppf *** *****) *** ** ** ****** ********:

hd vs sd

How *** *** ****** ***?

**** *** ******** ********** ** ******:

  • ** **** *** ****** ******* ** ******* ******, ****** ** further **** ~*** ****** / ~*** **** **** *** ******
  • ** ******** * ******'* *******, ****** ** ******* **** ~*** meters / ~**** **** **** *** ******

** ******, **** ** **** **** **** ******** * **** end *** (** ** ~*** ****, ** ** ~*** ****) and **** ****** ********. *** *********** ** ****** ****** ***** away **** ******* *** *** ********** ** **** ****** **** things **** *****, *********, *********, ***. ** *** ***** * hugely ********* ********** ****** **** * ***** ** ****** ****, costing $***,***+ ***.

Why ** ** **** **** ** ** *********

*** ** **** ****, ** * ******** ***** ** **** how *** ***** *** *** ***, ** ** ******* ** do * **** ** ****. ***** *** *** **** ******* that *** **** **** **** *** *** **** *********** *** misunderstanding ** **** ***** *** * ****** (****** *** ********* underestimate **). *** ********* **** ***, ** *** *** ***** * *** ***** (** ***** too, ** ****'* ********* ** *** ********) *** ******** **** realistically *** ** **** ** **** ******** ****.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

Hikvision 4K IR PTZ Tested (DS-2DF8836IV-AELW) on Nov 10, 2017
The IR PTZ trend continues, now with 4K resolution, with Hikvision releasing its DS-2DF8836IVAEL-W camera, a 4K 1/1.9" PTZ model specifying 200m IR...
Deep Learning Tutorial For Video Surveillance on Oct 17, 2017
Deep learning is a growing buzzword within physical security and video surveillance. But what is 'deep learning'? In this tutorial, we explain...
Multipoint Lock Access Control Tutorial on Oct 17, 2017
Doors are notoriously weak at stopping entry, and money can be misspent on wrong locks that leave doors quite vulnerable. While closed and locked...
Exporting Video Surveillance Tutorial on Oct 05, 2017
Exporting video surveillance is important when incidents or crimes occur. However, there are multiple ways to export video which have their pros...
Last Chance October Camera Course Registration on Oct 05, 2017
This is the last chance to register for the October Camera Course. Register now. Learn video surveillance and get certified. IPVM provides live...
Delayed Egress Access Control Tutorial on Oct 04, 2017
Is it ever legal to lock people into a building? The answer is: Yes... under specific situations. With so much of access control driven by life...
Geovision 4MP Super Low Cost Turret Tested (EBD-4700) on Sep 29, 2017
~$100 cameras, even for 4MP, are now expected by many dealers, as price cuts and ongoing sales have set this expectation. At the same time, many...
Propped Doors Access Control Tutorial on Sep 28, 2017
Doors should keep 'bad guys' out. One of the most basic problems with doors is people propping them open: Even worse, door propping...
Automatic Door Operators For Access Tutorial on Sep 20, 2017
Opening and closing doors might sound simple, but it takes a high-tech piece of door hardware to pull it off. Integrating automatic door operators...
Master Keying Tutorial on Sep 14, 2017
Mechanical keys are the most fundamental, albeit unsophisticated, form of access control. Like access control, Master Keying allows large scale use...

Most Recent Industry Reports

Dahua Hard-Coded Credentials Vulnerability on Nov 20, 2017
A newly discovered Dahua backdoor is described by the researcher discovering it as: not the result of an accidental logic error or poor...
Panasonic Unified Surveillance Strategy Analyzed on Nov 17, 2017
Panasonic is now a "Unified Surveillance" offering, as their ASIS 2017 booth proclaimed: Looking to make a comeback in the security industry,...
Amazon Cloud Cam Is Poor (Tested) on Nov 17, 2017
Retail behemoth Amazon has entered the surveillance market with the Amazon Cloud Cam, the eyes of its just-announced Amazon Key delivery...
Nest Secure Alarm System Tested on Nov 16, 2017
Google's expansion continues, this time into home security with their Nest subsidiary's move into alarm systems. They paid more than a...
Dahua Forbes 'Next Web Crisis' Vulnerability Dispute on Nov 16, 2017
The buffer overflow vulnerability in Dahua products is not in dispute, in fact we covered it when it was first published. What is in dispute is...
Isonas Cofounders Split, Launch Partner/Competitor on Nov 16, 2017
Breaking up is hard to do, especially when door access security is at stake. But that is exactly what has happened at Isonas. Senior employees...
Hikvision China Criticizes The WSJ on Nov 15, 2017
Hikvision, through the Chinese government's authoritative news service, has criticized the WSJ investigation into Hikvision. In this...
PoE UPS Tested (Energy Reconnect) on Nov 15, 2017
In security, backup power is important, but most often requires UPS systems or extra cabling to devices for low voltage power. Now, some have...
Axis Commits To Long-Term Firmware Support on Nov 15, 2017
With the rise of cyber security awareness, and a general increase in hardware reliability, "software warranties" may prove more valuable than...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact