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How to Adjust the Back Focus for TCM-5311 

Category Type 

Configuration Note 

Camera Model 

TCM-5311 

Firmware Version 

N/A 

Publish Date 

2009/09/03 

Last Review 

2009/09/23 

Knowledge Type 

Video Quality – Correct Focus 

Function Type 

Hardware - Lens 

 

Contents 

 

Introduction of Back Focus 

 

The Purpose of Adjusting Back Focus 

 

The Compatible Lenses for TCM-5311 

 

The Procedure of Adjusting Back Focus with PLEN-0203 

 

The Procedure of Adjusting Back Focus with PLEN-0205 

 

Demo Videos of Back Focus Adjustment 

 

References 

 

Introduction of Back Focus 

TCM-5311 is a high class camera that has a 

built-in  back  focus  ring,  by  which  it  is 

convenient to fine tune sensor position in 

order to achieve the ideal distance of the 
sensor from lens. 

 

By  rotating  the  back  focus  ring  it  is 

possible  to  slide  the  sensor  back  or  forth 

inside  the  camera.  The  back  focus  ring  is 

shown on the image 1. 
 

Once  the  back  focus  has  been  adjusted  properly,  the  lens  has  been  successfully 

adapted  to  camera,  and  there  is  no need to  re-adjust the back  focus thereafter.  All 

the following adjustments are done on the lens itself by changing focal length (zoom) 

and  front  focus,  depending  on  the  camera  location  and  the  distance  to  the 
monitored object. 

 

Image 2: Back Focus

 

Back Focus 

Image 1: Back Focus of TCM-5311 

Summary of Contents for TCM-5311

Page 1: ...TCM 5311 is a high class camera that has a built in back focus ring by which it is convenient to fine tune sensor position in order to achieve the ideal distance of the sensor from lens By rotating t...

Page 2: ...sable Maximize the depth of field for each zoom position Enhance the focus in the corners of the image In other words properly adjusted back focus can achieve optimal performance of the camera and the...

Page 3: ...d its corresponding focus to nearest N We are now at one end of zoom scale and we trying to get perfect focus there Point the camera at an object 75 cm away 2 5 feet The object is out of focus Slowly...

Page 4: ...For testing put the camera several meters away from the object In order to zoom in change zoom angle to telephoto T and then slide focus towards infinity until you get clear focus Case 2 We need a wid...

Page 5: ...ocus to FAR We are now at one end of zoom scale and we trying to get perfect focus there Slowly turn back focus to right until the object will attain focus It means the camera can attain focus with de...

Page 6: ...recommended to leave a bit space at the end of zoom scale for example set zoom to 9 10 mm Move focus slowly towards left until the focus is obtained The camera is now set for a wide angle view and wit...

Page 7: ...the lens PLEN 0203 the starting position is Wide 2 8mm and Near N For the lens PLEN 0205 the starting position is Telephoto 80mm and Far You may notice that if we slide the zoom of PLEN 0205 all the w...

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