Owner's Manual

Table Of Contents
13.2& &&&&&&&Digital&Lens&Optimizer&(D LO )&S ys te m &
The!Digital!Lens!Optimizing!system!is!built!into!the! EOS!R!camera!and! is!intended! to!implement!real-
time!correction s!for!a!nu m be r!of!optical!aberrations!and!distortions!encountered!over!a!wide!range!of!
shooting!conditions.!!Before!the!light!rays!reach!the!CMOS!image!sensor!they!pass!through!the!multi-
element!lens!and!various!filters!as !illu st rat ed !in !Figure!40.!!!!
!
Figure&40! A$simplistic$rendition$of$the$path$of$the$light$ray$tha t$enter$the$lens$and$are$u ltimately$
projected$on$to$the$camera$image$sensor$
A! point! light! source! that! travels! through! a! lens! system! encounters! numerous! aberrations! ! both!
monochromatic!and!chromatic!!that!tends!to!spre ad ! tha t! light.! ! !The!optical!scientists!speak!of!a!Point!
Spread!Function.!!!!However,!the!cumulative!effect!of!the!aberrations!is!to!create!a!range!of!shapes!in!
that!sprea d! fu nc tion !a nd ! th ey! a re! affe cte d! b y! the ! im age ! he ight! a nd ! by ! the !o p eration al! settin gs! o f! zoo m ,!
focus,!and!iris.!!!!!
There! are!two !basic!limitations! to!image! resolution!within!all!lenses! !th e!first!is!the !cumulative!effect!
of! the! six! m onochromatic! and! chromatic! aberrations! (termed! the! defocusing! distortions! and! which!
worsen!as!the!lens!aperture!approaches! maximum),!and! the!second!is!diffraction!(which!worsens!as!the!
lens!ape rtu re !is !st o pp e d !d o w n )!!see!Figure!41.!!!
!
Figure&41! Cumulative$ optical$ aberrations$ place$ limits$ on$ lens$ resolution$ near$ wide$ aperture$
settings$and$diffraction$places$other$limits$as$the$lens$aperture$is$stopped$down$
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