Fixed ***** ****** *******
***** ***** ****** *******, with ** *** ** adjusting *****, *** ****** used ** ************ ******* today. ** **** ****** the **** *** *** be ********** ** ***, whether ****** ****** * bullet ** ****** ******* which ** *** ******** to ** ****** ** the *****, ** ** the **** ** **** dome *******, ********** ** shrouds ** ** ************ with ** *** ** access.

**** ** ******* **** accessible ******, *** **** is ***** *********** ***** in ***** *** *** intended ** ** *********. This ***** **** ** focus ****** *** *******, users **** *** ******* but ** ******* *** camera, ******* ** ****** adjustments ** *****.
********** ******* ****** *** specialty ******* **** ** multi ****** ** ******* may ******* **** **** focus ** **** **** focus ***********. ************, **** legacy ***** **** ****** may ***** ***** ***** adjustment. *******, **** ***** instances *** ******** ** 2019.
Auto ****** ****** *****
*** ********* *******, ***** are *** ******** ***** of *****:
- **** *****/*********:** ********* *******, ***** may **** * ****** and ******* *** ****** to ************* ***** ******. This *** ** ****** via *** ******'* *** interface ** ** **** cases ** * ******** button ** *** ****** itself (*****). ********* ** found ** **** **** factors, ********* *****, *******, turrets, ***, *** *** cameras.

- ****** *****:****** ***** ******** *** user ** ********** ****** zoom *** **** ***** using ***** ** *** camera's ****. ****** ***** is **** ****** ** box *******, ****** **** dome ** ****** ****** may ***** *******, ** well.
Autofocus *** **** ******
** ****, ********* ** common ** *** **** majority ** ********* *******. Previously, ** *** ********** a **** ***, ******* feature. ***, ****** ***** is ********* ******* **** to *********** *******, **** as************** ***** ************ ***** ** *********** or ** ***** ***** imager***-*/********** ***** *** *********** lenses. *******, **** ***** models **** ** *** in *** ******* ** shifting ** *********, ****** manual ***** *** ********.
******* ** **** *****, we ***** ********* **** in **** ******, *** discuss ****** *****, ** well.
Two *********** ********
**** ******* *** ********, there *** *** ****** controls:
- **** *****: ******* ***** itself **** ****** ****** on ****. ***** ******** are ********* ******* **** through ***, * ******* Infinity (∞).
- ****: ******* *** ****' angle ** ****, ***** indirectly ******* *****. ********* labeled * (****) ******* T (*********).
***** ******** *** ***** in *** *** ********* of ********* **** ****** or ******** ** *** lens ** ****** ***** cameras. ** **** ** differences *** *** ** use ***** ******** *****.
How ** *****
****** ***** *** *** general ****: ****** *** to **** ****** *** focus. ******** **** ***** after ******** **** ******* the ******. *******, ***** are *** ******* ***** impact ****:
- ********* **** *********** **** moving:**** ********* ******* ************* track ***** ***** **** is ******* *** ******* autofocus **** *** **** stops ******. ******* ** this, ***** *** *** need ** ******** ******* autofocus ** ***.
- **** ** ***** ** check **** *****:** ***** *****, **** adjusting *** ****, *** image *** ****** ********* blurry *** *********** *** zoom ***** *** ** difficult. ** *** ** necessary ** ***** *** refocus, ** ***** *******, while ******* *** ****** to *** ******* ***** of ****.
Using **** *****/********* ******
**** **** ***** ********* is * ******* ******* and ****** ************, ****** are ***** ********, *** even ******** ** **** cameras. ***** ****** ********* fall **** *** ** three **********:
- **** ***** *********:** ***** ******, *** camera *** *** ***** on *** ******* ****** range, ******* ******** ** near ** ********** *******. This ** ***** ******** by ***** ** ****** target ** ***** **, such ** * ****** or **** *****, *** may ******* ****** ********** to **** **** ***** in **** *****.
- ***** ******* **** ********* from *** ** *****:**** ******* *** ******* to **** ***** **** switching **** *** ** night **** *** **** versa. ** *** *******, focus *** ** ********* when ********* **** *** to **** **** ****** with ** ******* ** as *** ****** **** not **** ****** ***** to ******* *****. ** these ******, ** ********* disabling **** ******* ** focus ******* ** ***** as ** ** **** effective *** ** ****** focus.
- ******* ** ***** *****:** **** *****, *** camera *** ** ****** to ***** ** *** desired ****** ******* ** is ****** *** ****/*** for *** **** ** compensate. **** ** **** common *** *** ******* with **** **** ***** where ***** ** *** rough ***** *** ****** prior ** *********, *** may ***** ** **** motorized ******* ** ****.
*** ***** ***** ************ the ********* *******, ******* how *** ****** ******** when *** ****** ** in ******* ****** ** soft *****, *** *** three ****** ********* *****.
Manufacturer ****/***** ******** ****
****** ************* *** ********* controls *** ***** *** zoom ** ***** *******, with **** **** ******* labeled *** ******* ** use **** ******.
*** *******, ****' ******** are **** ******, ******* Near/Far *** ****/****, **** slider ******** **** *** each. **** ** ******** to *** *** ************* installers (*** ****** ********** in **** *****), *** fine ****** ***** *** be ********* ** ***** are ** ******* ***** allow *** ********* ** "step" ***** ****/*** ** slight *******.

******** ** ******* ** Axis, **** * **** level ******, *** ******* used ** ******* ********* and **** **** ****/*** (0/Infinity) *****, ******** ***** control ** *****.

*********'* ******** *** ********* in *** "***" ***** pop *** ** *** live **** ** *** web *********. *** ******** have ** **** ******, only *****, ***** *** be ********* *** **** users. ************, ********* ** triggered ** * ****** further ****, ***** ** named "********* *****" ** its *******.

Manual ********* ****** (**** ** ****)
** ****** ***** *******, zoom *** ***** *** located ** *** **** itself, **** ***** ** locking ***** (****** "*******") used ** ****** ****. The ***** ****** ** these ******** ****** **** lens ** **** *** is ********* ******* ** the **** *****:

** ******, ***** ****** move *** ****** *** then ***** ** ** tighten *** **** *****/****. In ****** ****** **** manual ****** *** **** Back ***** **********, **** zoom **** ** ******** set ** *** ****, with ***** ******* ******** before ********** **** ***** in *** ******. **** adjustments ** ***** *** then ** **** **** the ******'* *** ********* (demonstrated ** *** ***** above).
Even **** ******: ****** ****
**** **** ****** ** 2019, **** ****** ******* manual ********** ** *** iris. **** ** ******** using * ***** ****/******, labeled ****, *** ********* in *** ****** ** the **** ******* ***** and ****. ********** ****** from ****** ** **** (C ** *), ********* left *** *** *** open ****** ** **** cases ** ***** ******** the ***** ******** *** camera. ******* **** *********** **** *********** ** iris *** *** ******.
****** **** ****** *** extremely **** ** ******* installs, ****** ***** *** see ***** *********** ** existing ******** ** ********* cameras.

Camera ********* *** ******
**** ***** ****** ******* on ***** *** *** related ******. *******, ****** and ********* ******* *** decisions ** ***** ******* are ******* *** *** much **** **** ****** cover ** ******* ******* details, ******* *** ***** of **** *****. *** more ***********, ******* ****** also ***:
[****: **** ****** *** originally ******** ** ****, but ******* ************* ** 2018/2019 **** ********** *********** on *** ******* ***** of *** ******, ************* videos, *** ****.]
Comments (15)
Undisclosed Integrator #1
How do you deal with out of focus issues when the Aperture opens (during the evening). ?
typically our efforts at focusing are done during daylight conditions, but camera goes out of focus at night
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Undisclosed Manufacturer #2
Great material. One comment I wanted to make is that I know of at least 2 brands that allow you to perform an auto-focus on a specified area of the scene. So, if the auto-focus is confused and tried to focus on the wrong part of the scene, you can draw a box, and then press the auto-focus button and the camera will focus on that part of the scene.
A question I have - how long do different camera take to perform an auto-focus? What is the range you have seen?
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Luca Fogliati
About autofocus it would be interesting to mention the mode that the camera uses to determine when the image is in focus.I guess that the most used (maybe the only?)is working with contrast so the more contrasted image=focus. But mayeb there are other modes that i don't know so it would be interesting to compare
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Charng Haw Guo
Newer information about the fundamental control of the auto / manual focus setting / adjustment. Interesting!!
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Undisclosed #5
Great article.
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Joshua Stanley
Good article. I notice sometimes some of the 36x rooftop PTZs we use struggle to get in focus when zoomed to their maximize zoom (36x). I can usually correct the issue by zooming out just a bit and then back in. I will try the fine focus now.
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Chuck Vivian
Great detail in the reading assignment.
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