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10.0&&&&&&&&&NEW&CONCEPTS&UNDERLYING&RF&LENSES&!
10.1&&&&&&&&&New&Feature&Unique&to&RF&Lenses&
The! new! RF! lens es ! represe n t! a! quite! radical! step! f or w a rd ! in! le n s! design s ! that! anticipa te ! the! future!
imaging !n e ed s !of!an!increasingly!sophisticated!end!user.!
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10.1.1&&&&&&Control&Ring&
A!significant!new!innovation! is!incorporated! into!the!design!of!these!lenses!—!a! special!knurled!control!
ring,!which!in!the!initial!RF!lens!embodimen ts !is!positioned!at!the!very!front!of!the!lens!—!before!the!
focusing!co n trol!rin g,!as!sho wn!in!Figure!11.!!It!capitalizes!on !the!augm e n te d !electronic!co mmunicatio n !
between! lens!and! camera!that!is!central! to!the!new! lens!design.! !!The! pu rpose!of! the!ring! is!to! facilitate!
intuitive! an d! flex ible ! acc es s ! to! adju st m e n t! of! Ap e rtu re ! valu e ! /! Shut te r! spe ed ! /! ISO ! and! Exposure!
Compensation.! !The!particular!function!selection! is!performed!in-camera!in!the!Custom!Function!menu.!!
In!the!new!lens e s!de sc rib e d !in!this!paper,!as!the!ring!is!rotated!it!clicks!(different!number!of!clicks!per!
revolution! for! different! RF! lense s )! which! serv es! to! provide ! a! sensory! cue! while ! the! photog rap he r! is!
looking!through!the! viewfinder.! ! The ! direction! of! rotation! can! b e! set! to! suit! user! preference.!!!And,!users!
have!a!choice! of!whether!control!ring !rotation!a ctu a lly !changes!e xp o s ur e!only!wh en !the!shutt er !button!
is!pres se d !half-way! (to!minimize!risk! of!inadvertent!changes),!or! to!h av e!any!moveme nt!directly!impact!
exposure!(with!no!need!to!first!hold!the!shutter!button!half-way!down).!!
! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !
Figure&11!! Showing$the$new$Control$Ring$that$extends$operational$flexibilities$for$the$photographer!
A! new! microprocessor! within!the! lens!has! improved! processing!capability! together!with!lower!power!
consumption! and! high-speed! com mu nication.!!The! increased! capacity! of! the! built-in! memo ry ! allows!
more!data!to!be!stored,!enabling!highly!accurate!lens!control! and!image!correction.!!This!is!especially!
importa n t!f or !th e !D igit a l!Le n s!Optimizer!feature!o f!the! RF!system .!
10.1.2&&&&&Aperture&Blade&Control&
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The! new ! family! of! RF! lenses ! inco rp o ra te s ! an! important! new! feature! that! automatically! closes! the!
aperture!blades!one!or!two!steps!wider! than! the!sm allest!position!upon! power! close! down.! ! ! !This!helps!
protect!the!camera!image!sensor!and!shutter!blades!from!damaging!high!intensity!light!sources.!
12!
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