Linhof Schneider Symmar User manual

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     he Schneider Symmor is o speciol lens for comeros designed to permit
 the correction of perspective. The movements of o comero ore only of

  reol procticol volue within the imoge circle depicted irreproochobly by the
  lens. In this leoflet we hope to moke it eosier to choose o Symmor lens of
 the most suitoble focol length. Here we give you oll the essentiol detoils
 obout the Schneider Symmor lenses, the lenses wirh o porticulorly wide
. ongle of view, which ollow even the most extreme comero movements
 for eoch individuol formot. The diometers of the octilol imoge circles listed
 in the tobles qre bosed on focusing qt co qnd o stop of fl22.Theoptimum
 definition lies generolly 2 to 3 stops below the full operture of the lens.
 Stopping down o lens further still will neither i-piJu", nor impoir the
 definition, but will result in goining more depth of field.

                    ti.                                                                                   '                                                '-                             -u'-
 The resolution, the controst ond the colour correction -.f th"-Stmmor
  lerlses hove fnode them fomous oll over the world. An overwhelming
 number of block-ond-white ond colour pictureg, in which o true-to-noture
 reproduction of every detoil is essentiol, ore mode with the Schneider
 Symmor. We must refroin from listing oll the fields of photogrophy  in
 which this type of lens excels, since it hos been found extremely suitoble
 for every type of work the professionol photog;opher could possibly
 encounter. For more convincing thon ony words ore the technicol detoils
 occomponying the pictures published oll over the world with the note

 "photogrophed with o Schneider Symmor".


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Movements of the comero formot within fhe imoge
circle

                       Moximum possible movement in mm frorn ll22 on    Foco   I
                      axs    Iength          2Y4 x 31/t    I                                                       |    5x7     |   8x10   I    ttxl4                  o        b   jolblolb                    jolblol

     105

     iso
     180
     210
     240

     300

     350

                             The volues given opply io horiiontol pictures.
                               For upright pictures volues o ond b must be exchonged.
                             For o combinotion of verticol ond horizontol movemeni
                                   ihe volues will decreose.
 The cdvontages e'f the Schn*ider Sy*RRcl-
I  Design: The Schneider Symmor f15.6is o four-component,  six-element lens,
  mode up of converging meniscus lenses which enclose the diophrogm,
   whilst two cemenied diverging lenses form the front ond reor components.
   The design is thot of o Gouss Double Lens of the second order.

  Angle of yiew: The Schneider Symmor f15.6 hos on ongle of view of 65o
   of full operture, which increoses to opprox.70" when the lens is stopped
  down; this meons thot comero movemenis qre possible to o much greoier
   extent thon with other lenses.

   Reqr element: lf the extension of the cqmero is sufficiently long, the reor
   element of the Schneider Symmor f/5.6 con be used on iis own. In this cose
    its operture is f/12 ond its focql length opprox. 1,75 x longer thqn thot of
   the whole lens, whilst its ongle of view is opprox.40o. At full operture it is
   eminently suitoble for portroiture.


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