Why photographers blur the background in a portrait photos?

Any help would be greatly appreciated

This explains that all. Http: / / / www.kenrockwell.com technology / bokeh.htm

Portrait Photography

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Professional Portrait Retouching Techniques for Photographers Using Photoshop    US $21.00

Our Mothers Portraits by 72 Women Photographers by Viviane Esders 1996    US $6.99

JOHN KOBAL Hollywood Portrait Photographers Allen Lane First Edition 1980    US $15.79

Portrait Photographers Guide to Posing by Bill Hurter 2004 Paperback    US $7.00

Master Lighting Guide for Portrait Photographers by Christopher Grey 2004    US $1.04

Portrait Painter Photographer in 1880s Canada Ontario Historical Portfolio    US $11.99

Sculpting with Light Techniques for Portrait Photographers by Allison Earnest    US $18.94

Planet Vegas a portrait of Vegas by 20 of the worlds leading photographers    US $4.00

NEW Master Lighting Guide for Portrait Photographers    US $23.06

Portrait Photographers Handbook Bill Hurter 3rd NEW    US $5.99

Artists in Camera A Gallery of Star Portraits By Photographer Roy Jones 1st    US $18.64

Kinsey Photographer Locomotive Portraits HB DJ    US $34.99

Masters of Starlight Photographers of Hollywood Fahey Rich Classic Portraits Art    US $19.65

The Photographers Guide to Portraits The Photographers Guide to by John F    US $9.98

Portrait Photographers Handbook by Bill Hurter 2007 Paperback    US $24.65

50 Lighting Setups for Portrait Photographers Easy to    US $30.00

The Portrait Photographers Guide to Hurter Bill 9781608952434 NEW Book    US $30.20

Zaida Ben Yusuf New York Portrait Photographer Frank Henry III Goodyear Very    US $6.89

Kinsey Photographer The Locomotive Portraits NEW    US $21.51

Kinsey Photographer The Locomotive Portraits 1984 HB DJ    US $35.00

The Great Britishphotographs byArnold Newmanthe greatest portrait photographer    US $6.85

SIGNED Arnold Newman The Great Photographers Portraits Paul Strand Ansel Adams    US $54.99

Power Marketing for Wedding and Portrait Photographers Mitche Graf Acceptable    US $1.00

The Photographer Portraits of Twenty five Masters Book HB NEW 0810983710 GBS    US $42.27

Master Posing Guide for Portrait Photographers A Compl    US $19.20

Portraits of War Civil War Photographers by George Sullivan    US $12.99

Portrait Photographers Handbook by Bill Hurter 2001 Paperback book    US $15.00

The Portrait Photographers Guide to Posing By Hurter Bill    US $31.37

Digital Photographer Magazine Issue 122 Your Best Ever Portraits FREE CD NEW    US $14.21

Childrens Portrait Photography Handbook Techniques for Digital Photographers    US $23.63

Photographers Guide to the Digital Portrait 2003    US $12.99

Simple Lighting Techniques for Portrait Photographers N    US $33.78

The Portrait Photographers Guide to Posing NEW    US $33.34

Photographers Guide to the Digital Portrait Start to    US $31.51

Posing Techniques For Digital Portraits A Photographers Guide to Making    US $14.34

PORTRAIT OF DYLAN A PHOTOGRAPHERS MEMOIR THOMAS DYLAN    US $5.99

Envisioning Family A photographers guide to making meaningful portraits of the    US $30.19

THE PORTRAIT PHOTOGRAPHERS GUIDE TO POSING BILL HURTER PAPERBACK NEW    US $33.32

THE PORTRAIT PHOTOGRAPHERS LIGHTI PETER TRAVERS JAMES CHEADLE PAPERBACK NEW    US $26.22

Portrait Photographers Handbook NEW by Bill Hurter    US $29.70

Master Lighting Guide for Portrait Photographers NEW    US $27.49

Doug Boxs Guide to Posing for Portrait Photographer    US $34.95

Portrait Photographers Guide to Posing NEW    US $27.49

Sculpting with Light Techniques for Portrait Photographers Allison Earnest Go    US $22.33

England My England A Photographers Portrait NEW    US $47.10

Portrait Photographers Handbook by Bill Hurter 200    US $21.95

Simple Lighting Techniques for Portrait Photographers Amherst Media Inc by    US $19.48

FAST 2DAY UPS COM MASTER LIGHTING GUIDE FOR PORTRAIT PHOTOGRAPHERS CH    US $25.39

The Professional Photographers Marketing Handbook Portrait and Wedding Edition    US $9.99

The Portrait Photographers Lighting Style Guide Recip    US $26.24

Wedding and Portrait Photographers Legal Handbook    US $16.00

The Photographers Guide to Portraits NEW    US $20.18

The Art of the Great Hollywood Portrait Photographers 1925 1940 John Kobal HB DJ    US $44.00

Portrait Photographers Handbook by Bill Hurter    US $21.00

Portrait Photographers Guide to Posing The by Bill Hurter Paperback book    US $33.70

The Portrait Photographers Posing Guide by Nigel Holmes 2006 Paperback    US $33.46

Mr Mkhizes portrait other stories from New South Africa Photographers gallery    US $11.05

Master Posing Guide for Portrait Photographers A Complete Guide to Posing Singl    US $7.92

Horse a Portrait A Photographers Life With Horses    US $23.35

Master Lighting Guide for Portrait Photographers Very Good Books    US $18.99

DIGITAL PHOTOGRAPHER MAGAZINE PORTRAITS PHOTO FIXES SPEEDLIGHT USER GUIDE LUMIX    US $14.95

Marc Baptiste Innocent Nudes Erotic Female Portraits Fashion Photographer HC DJ    US $125.99

Kinsey Photographer The Locomotive Portraits    US $7.99

Rangefinder Magazine for Photographers July 2002 Special Portrait Issue    US $9.00

Horse A Portrait A Photographers Life With Horses by Christiana Slawik    US $33.48

Portrait Photographers Style Guide A Recipe Book | Peter Travers James Cheadie    US $26.70

NEW Master Posing Guide for Portrait Photographers    US $15.00

The Portrait Photographers Guide to Posing by Bill Hurter Paperback 2004    US $19.99

PHOTOGRAPHERS GUIDE TO THE DIGITAL PORTRAIT AL AUDLEMAN PAPERBACK NEW    US $30.24

ZAIDA BEN YUSUF NEW YORK PORTRAIT PHOTOGRAPHER 1900    US $35.00

Profl Portrait Retouching Techniques for Photographers Using Photoshop    US $27.50

Professional Portrait Posing Techniques and Images from Master Photographers P    US $16.39

Zaida Ben Yusuf New York Portrait Photographer    US $16.00

Professional Portrait Lighting Techniques and Images from Master Photographers    US $24.06

Photographer LEWIS MORLEY 1950s to 2000s Icon Portraits Fashion Art Theater New    US $7.99

Wedding Photographers International ALBUM 94 Photography Portrait    US $15.00

Zaida Ben Yusuf New York Portrait Photographer Frank H Goodyear III Excellen    US $9.01

Planet Vegas A Portrait of Las Vegas by 20 of the Worlds Leading Photographer    US $6.89

KENNEDY JFK REMEMBERED AN INTIMATE PORTRAIT BY HIS PERSONAL PHOTOGRAPHER    US $10.00

Portrait Photographers Handbook    US $6.51

Photographer JOYCE TENNESON 1968 2008 Portraits Nude Female Archetypes 1st Ed HC    US $11.99

Portrait of Dylan Photographers Memoir Rollie McKenna    US $58.39

NEW The Portrait Photographers Guide to Posing Hurte    US $21.04

Photographer David Seidner Portraits    US $45.99

Master Posing Guide for Portrait Photographers by J D Wacker 2001 Paperback    US $34.95

Photoshop Effects for Portrait Photographers    US $23.41

DOUG BOXS GUIDE TO POSING FOR PORTRAIT PHOTOGRAPHERS DOUG BOX PAPERBACK NEW    US $30.81

DIANA PORTRAIT OF A PRINCESS FINCHER ROYAL PHOTOGRAPHER NON FICTION BOOK    US $15.00

The Portrait Photographers Guide to Posing    US $15.00

The Art of Posing Techniques for Portrait Photographer 9781584289913    US $34.95

Kinsey Photographer Locomotive Portraits BRAND NEW    US $32.94

The Model A portrait of beauty by ten master photographers Adolph edited by S    US $23.94

FRANK GOODYEAR III ZAIDA BEN YUSUF NEW YORK PORTRAIT PHOTOGRAPHER 2008 1ST ED    US $6.99

Portraits of War Civil War Photographers and Their Work by George Sullivan3122    US $26.45

OLYMPIC PORTRAITS Photographer ANNIE LEIBOVITZ 1996 Summer Games Atlanta Georgia    US $8.99

Kinsey Photographer the Locomotive Portraits A Half Century of Negatives by    US $24.95

Professional Photographer Magazine February 1991 Dreammaker Portraits    US $9.00